Showing papers in "Phosphorus Sulfur and Silicon and The Related Elements in 2011"
TL;DR: In this paper, the hydrolysis kinetics of 14 alkoxy silane coupling agents were carried out in an ethanol:water 80:20 (w/w) solution under acidic conditions and were monitored by 1H, 13C, and 29Si NMR spectroscopy.
Abstract: The hydrolysis kinetics of 14 alkoxy silane coupling agents were carried out in an ethanol:water 80:20 (w/w) solution under acidic conditions and were monitored by 1H, 13C, and 29Si NMR spectroscopy. Acidic conditions were selected in order to enhance the silanol formation and to slow down the self-condensation between the resulting hydrolysed silanol groups. In situ 29Si NMR spectroscopy allowed the determination of the intermediate species as a function of the reaction time. Thus, the following silane coupling agents were studied: 3-methacryloxypropyl trimethoxy silane (MPMS), 3-mercaptopropyl trimethoxy silane (MRPMS), 3-cyanopropyl triethoxy silane (CPES), triethoxy vinyl silane (VES), trimethoxy (2-phenylethyl) silane (PEMS), octyl triethoxy silane (OES), trimethoxy (7-octen-1-yl) silane (OEMS), 3-aminopropyl triethoxy silane (APES), 3-aminopropyl trimethoxy silane (APMS), 3-(2-aminoethylamino)propyl trimethoxy silane, (DAMS), 3-[2-(2-aminoethylamino)-ethylamino]propyl trimethoxy silane (TAM...
83 citations
TL;DR: A triazole compound, C46H46N10O2S2, has been synthesized, and the crystal structure was determined by a single crystal X-ray diffraction study as mentioned in this paper.
Abstract: A new triazole compound, C46H46N10O2S2, has been synthesized, and the crystal structure was determined by a single crystal X-ray diffraction study. The fungicidal activity of the title compound was determined, and the results showed that it displays moderate fungicidal activity. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
76 citations
TL;DR: In this article, the influence of different heteroaryl and functionalized aryl substituents on the electron-donating ability and basicity of the phosphorus atoms in hetero-aryl phosphines and diphosphines has been determined by the use of the direct 1JPSe coupling constants of the corresponding selenides.
Abstract: The influence of different heteroaryl and functionalized aryl substituents on the electron-donating ability and basicity of the phosphorus atoms in heteroaryl phosphines and diphosphines has been determined by the use of the direct 1JPSe coupling constants of the corresponding selenides. The generality of the use of 31P–77Se spin–spin coupling constants as probe for the basicity of phosphines is discussed as well as the scope and limits of this concept. GRAPHICAL ABSTRACT
60 citations
TL;DR: In this paper, a series of acyl thiourea derivatives were synthesized in one-pot using PEG-600 as the phase transfer catalyst (PTC), and the structures of title compounds were characterized by 1H NMR, IR, MS, and elemental analysis.
Abstract: A new series of acyl thiourea derivatives were synthesized in one-pot using PEG-600 as the phase transfer catalyst (PTC). The structures of title compounds were characterized by 1H NMR, IR, MS, and elemental analysis. In addition, the fungicidal activity of the acyl thiourea derivatives were tested, which showed that most of them exhibit moderate activity. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
58 citations
TL;DR: In this article, stable derivatives of oxaphospholes were obtained from the reaction between electron-deficient acetylenic compounds and phenacyl bromide or its derivatives in the presence of triphenylphosphine in acetonitrile as the solvent in excellent yields.
Abstract: Stable derivatives of oxaphospholes were obtained from the reaction between electron-deficient acetylenic compounds and phenacyl bromide or its derivatives in the presence of triphenylphosphine in acetonitrile as the solvent in excellent yields. GRAPHICAL ABSTRACT
49 citations
TL;DR: Succinimide-N-sulfonic acid (SuSA) is easily prepared by the reaction of succinimides with chlorosulfonic acids as discussed by the authors, which is able to efficiently catalyze the chemoselective trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS).
Abstract: Succinimide-N-sulfonic acid (SuSA) is easily prepared by the reaction of succinimide with chlorosulfonic acid. This reagent is able to efficiently catalyze the chemoselective trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS). All reactions were performed under mild reaction conditions, giving excellent yields. GRAPHICAL ABSTRACT
39 citations
TL;DR: In this paper, a new class of α-aminophosphonates 2−16 has been synthesized by the reaction of equimolar quantities of Schiff's bases with diethyl/dimethyl/diphenyl phosphite in dry toluene under reflux conditions using tetramethylguanidine (TMG) as a catalyst via Pudovik reaction in high yields.
Abstract: A new class of α-aminophosphonates 2–16 has been synthesized by the reaction of equimolar quantities of Schiff's bases with diethyl/dimethyl/diphenyl phosphite in dry toluene under reflux conditions using tetramethylguanidine (TMG) as a catalyst via Pudovik reaction in high yields (78–89%). The structures of the title compounds have been established by elemental; infrared (IR); 1H-, 13C-, and 31P-NMR; and mass spectral data analyses. They were found to possess significant antimicrobial and antioxidant activity. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
37 citations
TL;DR: The residual fate of 14C-ethion labeled at the ethyl group in chamomile flowers and oil was studied in this article, where the results showed that the percentage of removal was 18% to 47%.
Abstract: The residual fate of 14C-ethion labeled at the ethyl group in chamomile flowers and oil was studied. 14C-ethion and some of its degradation products have been prepared for the present investigation. 14C-residues in its flowers and oil were determined at different time intervals. Chromatographic analysis of chamomile oil extracts revealed the presence of the parent compound together with four metabolites, which were identified as ethion monooxon, ethion dioxon, O,O-diethyl phosphorothioate, and O-ethyl phosphorothioate. Effect of drying on ethion residues in chamomile flowers was investigated. Ethion residues were decreased by sun drying of chamomile flowers. The percentage of removal was 18%–47%. Effect of using low cost adsorbents for removal of ethion residues from chamomile oil was investigated. The removal percentage due to adsorption was 100% for CaO and saw dust adsorbers and for watermelon peels, bagass, and rice bran adsorbers were 36%, 41%, and 90%, respectively. Our results proved that ...
27 citations
TL;DR: A series of dialkoxyphosphoryl aryl methyl 2-(4,6-dimethoxy-pyrimidin-2-yloxy) benzoate derivatives was designed and synthesized as discussed by the authors.
Abstract: A series of dialkoxyphosphoryl aryl methyl 2-(4,6-dimethoxy-pyrimidin-2-yloxy) benzoate derivatives was designed and synthesized All new compounds were identified by elemental analysis, infrared (IR), 1H-NMR, and mass spectrometry (MS) Their herbicidal activity against a set of weed species was examined Some of the compounds showed potential herbicidal activity, which provided some indications for further studies on structure modification Supplemental materials are available for this article Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file GRAPHICAL ABSTRACT
24 citations
TL;DR: In this paper, two synthetic methods leading to β-iminophosphonates, phosphineoxides, and sulfides 2 are reported, one involves the reaction of imines with chlorophosphines and phosphites followed by oxidation or sulfurization.
Abstract: Two synthetic methods leading to β-iminophosphonates, phosphineoxides, and sulfides 2 are reported. The first method involves the reaction of imines with chlorophosphines and phosphites followed by oxidation or sulfurization. The second one utilizes the reaction of imines with diethylchlorophosphate and thiophosphate. The stereochemistry of the obtained products is discussed, and their structure is confirmed by NMR (1H, 31P, 13C) and IR spectroscopies, and by mass spectrometry. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
22 citations
TL;DR: In this article, the compounds {4-(3-methyl-3-aryl(mesityl-phenyl-tetralino)cyclobutyl)-1,3-thiazol-2-yl]amino}(aryl)methyl-phosphinic acids 2a-l were prepared by condensation of 2-amino-4-( 3-aryl,mesity-l-phenyl-to-tralino)-3-methanol) thiazoles 1a-c with various aromatic aldehydes and hyp
Abstract: The compounds {[4-(3-methyl-3-aryl(mesityl-phenyl-tetralino)cyclobutyl)-1,3-thiazol-2-yl]amino}(aryl)methyl-phosphinic acids 2a–l were prepared by condensation of 2-amino-4-(3-aryl(mesityl-phenyl-tetralino)-3-methylcyclobutyl) thiazoles 1a–c with various aromatic aldehydes and hypophosphorous acid through a one-pot reaction. The characterizations of these compounds were obtained by elemental analyses, infrared (IR) spectra, and 1H, 13C, and 31P NMR (nuclear magnetic resonance) techniques. The synthesized compounds were tested in vitro against one Gram-positive and two Gram-negative bacterial strains, one mycobacterial strain, and a fungus Candida albicans. Compound 2f showed significant activity against Staphylococcus aureus, whereas the others had no remarkable activity on this strain. Compound 2g was found to be more active than the others against Mycobacterium fortuitum at an MIC (minimum inhibitory concentration) value of 32 μg/mL. The antibacterial and antifungal activities of 2a–l were also...
TL;DR: In this paper, the role of radicals in the flame retardant mechanism of 9,10,dihydro-9,10-oxa-10,phosphaphenanthrene-10-sulfide (DOPS) and DAPO were discussed.
Abstract: 9,10-Dihydro-9,10-oxa-10-phosphaphenanthrene-10-oxide (DOPO) has been commercialized as a gas phase active flame retardant. Its P‒H bond allows its reactive incorporation into epoxy resins and formation of new additives via Michael-like addition. To better understand of the role of radicals in the flame retardant mechanism, 9,10-dihydro-9-aza-10-phosphaphenanthrene-10-oxide (DAPO) and 9,10-dihydro-9,10-oxa-10-phosphaphenanthrene-10-sulfide (DOPS) were synthesized. DAPO was found to undergo unprecedented tautomerism for a P(V) cycle. The detailed synthetic approach and spectroscopic characterization of DAPO and the flame retardant behavior of DAPO and DOPS will be discussed.
TL;DR: In this article, a real-time mass spectrometer was used to identify reactive sulfur-containing compounds formed from cutting seven different genus Allium species, garlic, onion, elephant garlic, leek, Chinese chives, and the ornamental species, Allium siculum and A. stipitatum.
Abstract: Direct analysis in real-time mass spectrometry (DART-MS) under both positive-ion (PI) and negative-ion (NI) high-resolution (HR) conditions has been used to identify reactive sulfur-containing compounds formed from cutting seven different genus Allium species, garlic, onion, elephant garlic, leek, Chinese chives, and the ornamental species, Allium siculum and A. stipitatum. From cut garlic, PI-DART-MS shows allicin, allyl/methyl and dimethyl thiosulfinates, diallyl trisulfane S-oxide, allyl alcohol, and propene, whereas NI-DART-MS shows 2-propenesulfenic acid, 2-propenesulfinic acid, SO2, and pyruvate. From cut onion, PI-DART-MS shows mainly the lachrymatory factor (LF), along with much lower amounts of thiosulfinates, zwiebelanes, and a bis-sulfine. From cut elephant garlic, both allicin and LF are found, along with thiosulfinates and bis-sulfine. From cut leek, using PI-DART-MS, mixed methyl-1-propenyl-n-propyl thiosulfinates are found, whereas cut Chinese chive shows predominantly methyl with ...
TL;DR: The carbanion stabilizing effect induced by the arylsulfonyl group has dominated and typified the chemistry of this functional entity for a long time and a plethora of exciting synthetic applications have been found as mentioned in this paper.
Abstract: The carbanion stabilizing effect induced by the arylsulfonyl group has dominated and typified the chemistry of this functional entity for a long time. In addition to this important feature, the activity of the arylsulfonyl moiety as a leaving group has been exploited and a plethora of exciting synthetic applications have been found. The base- or acid-promoted elimination of the sulfonyl group from of α-amido sulfones and sulfonyl indoles is able to produce the in situ generation of reactive N-acylimino and alkylideneindolenine intermediates that can be used in the diastereo and enantioselective synthesis of various amino and heterocyclic compounds.
TL;DR: In this paper, the scope and limitation of the reaction between sulfonyl chlorides and cyclic iminium ions were investigated, and the results indicate that alkanesulfonyl chains react with cyclical imines to generate N-alkanesulfoneyl cyclic IMINium ions, which are attacked by nucleophiles, such as water and chloride anion, in the reaction systems, affording addition products.
Abstract: Although alkanesulfonyl chlorides react with linear imines to give rise to β-sultam derivatives, in this study, they were reacted with various cyclic imines, including 1-pyrroline, oxazoline, 5,6-dihydro-4H-oxazines and thiazines, 4,5-dihydro-3H-benzo[c]azepine, and 3,4-dihydroisoquinoline, to produce diverse products instead of β-sultam derivatives. The results indicate that alkanesulfonyl chlorides react with cyclic imines to generate N-alkanesulfonyl cyclic iminium ions, which are attacked by nucleophiles, such as water and chloride anion, in the reaction systems, affording addition products. The iminium intermediates cannot undergo a ring closure to form β-sultam derivatives. Arenesulfonyl chlorides showed similar behavior when they reacted with cyclic imines. The scope and limitation of the reaction between sulfonyl chlorides and imines were investigated. GRAPHICAL ABSTRACT
TL;DR: In this paper, the effect of microwave and solvents including ionic liquids on the Diels-Alder reaction of 1,2-dihydrophosphinine oxides and fragmentation-related phosphorylation of phenols with 2-phosphabicyclo[2.2] octadiene oxides was studied.
Abstract: The effect of the use of microwave (MW) and solvents including ionic liquids on the Diels–Alder reaction of 1,2-dihydrophosphinine oxides (1) and fragmentation-related phosphorylation of phenols with 2-phosphabicyclo[2.2.2]octadiene oxides (4) was studied. The MW-assisted Diels–Alder reaction of dihydrophosphinine oxides (1) with N-phenylmaleimide may be advantageous to carry out in [bmim][BF4] due to shorter reaction times, but the dimerization of the double-bond isomers (A and B) of the dihydrophosphinine oxides (1) may be best accomplished under MW in the absence of any solvent. The fragmentation-related phosphorylations may also be carried out under MW, which with the P-phenyl precursor (4a) became more efficient in [bmim][BF4]. GRAPHICAL ABSTRACT
TL;DR: In this paper, two cyclotetraphosphazene derivatives were synthesized by the reaction of octachlorocyclotetraprapazene with the potassium salt of 4-hydroxybenzaldehyde, and subsequent reduction of aldehyde groups to alcohol groups using sodium borohydride.
Abstract: Two novel cyclotetraphosphazene derivatives were synthesized by the reaction of octachlorocyclotetraphosphazene with the potassium salt of 4-hydroxybenzaldehyde, and subsequent reduction of aldehyde groups to alcohol groups using sodium borohydride. The bromination reaction was carried out using PBr3 to give N4P4(OC6H4-p-CH2Br)8 (4). This compound was employed in reaction with imidazole or morpholine to produce eight-armed, star-branched title compounds. The target compounds were characterized by 1H, 31P, and 13C NMR as well as IR and ESI-MS. The Cu complex of 5a was effective in oxidative cleavage reactions. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
TL;DR: In this paper, the first α-aminophosphonates were obtained by a simple and efficient one-pot method from the reaction between aldehyde, aniline, and triphenyl phosphite in the presence of acetic acid as a catalyst and solvent at room temperature.
Abstract: For the first time, α-aminophosphonates were obtained by a simple and efficient one-pot method from the reaction between aldehyde, aniline, and triphenyl phosphite in the presence of acetic acid as a catalyst and solvent at room temperature. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
TL;DR: In this paper, a tripartite coordination was demonstrated for antifungal and antibacterial activities of the tin compounds of the type R2SnL(I-III).
Abstract: Dichlorodiorganotin (IV) R2SnCl2 (where R = Me, Bu, or Ph) on reaction with substituted hydrazones (H2L) derived from the condensation of pyridoxal hydrochloride with substituted acid hydrazides, H2pydx-inh (LI), H2pydx-th (LII), or H2pydx-nh (LIII) (pydx = pyridoxal, inh = isonicotinoyl hydrazone, th = 2-thiophene carboxyl hydrazone, nh = 1-naphthoyl hydrazone), dry benzene give pentacoordinated complexes of the type R2SnL(I-III). In the solution of isolated complexes the ligand acted in a tridentate manner (O,O,N), coordinating through a phenolic oxygen, oxygen of keto group after enolization, and nitrogen of azomethine group. The synthesized complexes were characterized by elemental analyses, molar conductance, molecular weight determination, and infrared (IR) and nuclear magnetic resonance (NMR; 1H, 13C, and 119Sn) spectral data. The ligands and their tin complexes were evaluated for antifungal and antibacterial activities, and the results indicate that they exhibit significant antimicrobial ...
TL;DR: In this article, the zwitterionic 1:1 intermediates generated from trialkyl phosphites and dialkyl acetylenedicarboxylates are trapped by 2,4-thiazolidinedione and 5-arylidene- 2, 4-thiaolidinediones.
Abstract: The zwitterionic 1:1 intermediates generated from trialkyl phosphites and dialkyl acetylenedicarboxylates are trapped by 2,4-thiazolidinedione and 5-arylidene- 2,4-thiazolidinediones to produce dialkyl 2-(2,4-dioxothiazolidin-3-yl)-3-(dialkoxyphosphoryl) succinates and dialkyl 2-(5-arylidene-2,4-dioxothiazolidin-3-yl)-3-(dialkoxyphosphoryl) succinates in good yields. GRAPHICAL ABSTRACT
TL;DR: In this article, enzymes recognize any type of chirality of the substrate and can be used for the stereoselective transformations of a variety of organosulfur compounds, resulting in the preparation of chiral non-racemic sulfur products.
Abstract: Enzymes, which are very efficient catalysts developed by nature to control chemical transformations in vivo, are also capable of adopting non-natural substrates, among them heteroorganic derivatives, and are also capable of working in non-aqueous media. Being intrinsically chiral, enzymes recognize any type of chirality of the substrates. This feature has been utilized for the stereoselective transformations of a variety of organosulfur compounds, resulting in the preparation of chiral non-racemic sulfur products.
TL;DR: In this paper, a number of organotin complexes with the general formulae R2SnL2, R2snCl)L, and R3SnL have been synthesized where R = CH3, n-C4H6, C6H5, c6H11, and L = 4-(hydroxy methylpiperidine-1-carbodithioic acid).
Abstract: Organotin complexes with the general formulae R2SnL2, R2Sn(Cl)L, and R3SnL have been synthesized where R = CH3, n-C4H6, C6H5, C6H11, and L = 4-(hydroxy methyl)piperidine-1-carbodithioic acid. The newly synthesized complexes have been characterized by elemental analysis, IR, NMR (1H, 13C and 119Sn), and, for one example, a single crystal x-ray structure. The FT-IR data shows the bidentate nature of the ligand. This coordination behavior is also confirmed by semi-empirical study. In the solid state, diorganotin complexes exhibit the penta/hexacoordinated geometry, whereas the triorganotin(IV) complexes show the five coordinated geometry. 119Sn NMR data reveal that triorganotin(IV) complexes exhibit the four coordinated geometry in solution, whereas the diorganotin(IV) compounds show the higher coordination, probably five or six. X-ray diffraction analysis of complex (2) shows a square pyramidal geometry around the tin atom on the basis of τ value. Supplemental materials are available for this artic...
TL;DR: In this paper, the performance of the ab initio and density functional theory (DFT) functional, B3LYP and PBEPBE, in conjunction with selected basis sets for the prediction of 31P shielding constants for small phosphorous-containing molecules is assessed.
Abstract: The performance of the ab initio and density functional theory (DFT) functional, B3LYP and PBEPBE, in conjunction with selected basis sets for the prediction of 31P shielding constants for small phosphorous-containing molecules is assessed. The effects of applied factors are discussed. By including the electron correlation treatment, B3LYP and PBEPBE are the most accurate methods to compute the chemical shielding for a set of small phosphines that was studied. Also, additional improvements of DFT were obtained by empirical scaling of basis sets in calculation of chemical shifts. For molecules containing only phosphorous and carbon atoms with sp3 hybridization, the PBEPBE/6-311G(d,p) level of theory has been shown to provide reliable 31P chemical shifts. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT
TL;DR: In this article, an efficient, chemoselective, and metal-free oxidation of sulfides is described using urea-hydrogen proxide (UHP) adduct as a stable, inexpensive, and easily handled reagent in the presence of uronium hydrogen sulfate (UHS).
Abstract: An efficient, chemoselective, and metal-free oxidation of sulfides is described using urea-hydrogen proxide (UHP) adduct as a stable, inexpensive, and easily handled reagent in the presence of uronium hydrogen sulfate (UHS). Both UHP and UHS release urea as an environmentally benign byproduct. The advantages of the described method are generality, chemoselectivity, short reaction time, low cost, high atom economy, and green chemistry protocols. GRAPHICAL ABSTRACT
TL;DR: In this article, a methodology for the synthesis of carcass-type (cage-like type) phosphoranes was developed, which allows us to obtain the products of the given structure with a high regio- and stereoselectivity in the result of cascade processes.
Abstract: The methodology for the synthesis of carcass-type (cage-like type) phosphoranes was developed, which allows us to obtain the products of the given structure with a high regio- and stereoselectivity in the result of cascade processes.
TL;DR: A ring expansion reaction based on the interaction between 1,2,3-triarylcyclopropenylphosphonium bromide (1) and sodium polyphosphides gives sodium 3,4,5 -triaryl-1,2-diphosphacyclopentadienides (2) containing various substituents in the para-position of the aryl groups with a high yield as discussed by the authors.
Abstract: A new ring expansion reaction based on the interaction between 1,2,3-triarylcyclopropenylphosphonium bromide (1) and sodium polyphosphides gives sodium 3,4,5-triaryl-1,2-diphosphacyclopentadienides (2) containing various substituents in the para-position of the aryl groups with a high yield. However, this reaction of trialkylcyclopropenylphosphonium bromide (i.e., tri(tert-butyl)- or triisopropylcyclopropenylphosphonium bromide) does not result to the formation of sodium 1,2-diphosphacyclopentadienides. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.
TL;DR: In this paper, a one-pot, multicomponent synthesis of 4-arylidene-3-methyl-1-(4-arylthiazol-2-yl)-1H-pyrazol-5(4H)-ones is described using phenacyl bromides, thiosemicarbazide, ethylacetoacetate, and aryl aldehydes.
Abstract: A novel, one-pot, multicomponent synthesis of 4-arylidene-3-methyl-1-(4-arylthiazol-2-yl)-1H-pyrazol-5(4H)-ones is described using phenacyl bromides, thiosemicarbazide, ethylacetoacetate, and aryl aldehydes. This synthesis involves simultaneous formation of two heterocycles like thiazole and pyrazolone along with condensation of active methylene group by aldehydes via Knoevenagel reaction. The methodology is mild, efficient, and high yielding. GRAPHICAL ABSTRACT
TL;DR: Progress in the synthesis of novel fluorescent conjugates of N-heterocyclic bisphosphonate drugs and related analogues, together with some recent applications of these compounds as imaging probes, are briefly discussed.
Abstract: Progress in the synthesis of novel fluorescent conjugates of N-heterocyclic bisphosphonate drugs and related analogues, together with some recent applications of these compounds as imaging probes, are briefly discussed.
TL;DR: One-pot three-component reactions of secondary or primary phosphines and primary amines with glyoxylic acid provide a wide variety of acyclic or cyclic phosphinoglycines as mentioned in this paper.
Abstract: One-pot three-component reactions of secondary or primary phosphines and primary amines with glyoxylic acid provide a wide variety of acyclic or cyclic phosphinoglycines, in the case of some chiral amines with high diastereoselectivity. The structure, hydrolysis, oxidation, coordination at M(CO)5 (M = Cr, Mo, W), and use in nickel-catalyzed ethylene oligomerization were studied.
TL;DR: In this paper, five novel γ-arylmethylene-aminopropyl-3,7,10-trimethyl-silatrane derivatives were synthesized, and their activities of regulating the plant growth in culture dishes were tested.
Abstract: Five novel γ-arylmethylene-aminopropyl-3,7,10-trimethyl-silatrane derivatives and three novel γ-arylmethylene-aminopropyl-silatrane derivatives were synthesized, and their activities of regulating the plant growth in culture dishes were tested. The compounds showed good activities of regulating the root/stem growth on turnips of amphibrya and corns of dicotyledon at a concentration of 40 ppm. Moreover, the activities of two were stronger than that of brassinolide, the positive control, while those of the remainder were not obvious. The activities of regulating plant growth of derivatives with a methyl group on the ring were stronger than those of derivatives with no methyl substituent. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT