Showing papers in "Chinese Chemical Letters in 2007"

TL;DR: In this article, a modified pectin cross-linked with adipic acid, was synthesized and used for heavy metal removal from wastewater, which had a rough, porous phase covered with carboxy groups, resulting a high adsorption capacity.

TL;DR: In this article, polyaniline sensitized nanocrystalline TiO2 composites (TiO2/PAn) were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue (MB).

TL;DR: In this article, 2,3-Dihydro-2,aryl-4(1 H )-quinazolinones were prepared in good yields via condensation of o -aminobenzamide with aldehydes promoted by a catalytic amount of Sc(OTf) 3 under mild conditions.

TL;DR: In this article, 2, 2, 3-dihydro-4(1H)-quinazolinones were obtained in high yields by condensation of anthranilamide with aryl, alkyl or hetero-aryl aldehydes or ketones without any catalyst.

TL;DR: Heteropoly acid H3PW12O40 (PW) has been used as an effective catalyst for the synthesis of thieno[2,3-d]pyrimidin-4(3H)-one derivatives as mentioned in this paper.

TL;DR: In this paper, an efficient synthesis of 3, 4-dihydropyrimidin-2(1H)-one derivatives using formic acid as catalyst, from aldehydes, β-ketoester and urea (thiourea) without solvent under the irradiation of microwave is described.

TL;DR: By using acetonitrile as the sole nitrogen source, a microbial strain with high nitrilase activity was newly isolated from soil, which could enantioselectively transform racemic mandelonitrile into (R)-(-)-mandelic acid, with an enantiomeric excess of ＞99.9%.

TL;DR: In this article, a one-pot oxidative heterocyclization of 2-aminobenzamide with aldehydes in the presence of potassium permanganate in dimethylacetamide under microwave irradiation was performed.

TL;DR: Cultivation of an endophytic fungus Aspergillus niger EN-13 that was isolated from the inner tissue of the marine brown alga Colpomenia sinuosa resulted in the characterization of a new naphthoquinoneimine derivative, namely, 5,7-dihydroxy-2-[1-methoxy-6-oxo-6H-pyran-2-yl)-2-phenylethylaniino]-

TL;DR: In this article, a new method for the determination of antithrombotic activity of egg white protein hydrolysate (EWPH) was developed using a microplate reader.

TL;DR: In this paper, a novel phthalonitrile derivative containing an amino group, 3,5-bis(3,4-dicyanophenoxy)aniline (CPA), was synthesized via a nucleophilic displacement of 4-nitrophthaloniitrile and 5-aminoresorcinol hydrochloride.

TL;DR: In this paper, a polycarbosilane bearing allyl groups has been prepared by a one-pot synthesis with chloromethyltrichlorosilanes, allyl chloride and allyl methyl chloride as the starting materials.

TL;DR: Chloromethylated poly(phthalazinone ether sulfone ketone) (CMPPESK) was prepared from poly(phylazinonesinone e sulfone (PET) (PPESK), which was quaternized by quaternization as discussed by the authors.

TL;DR: In this paper, a double metal cyanide (DMC) catalysts were successfully prepared by modifying the central metal (M) and one of cyanide ion (CN−) in Zna[M(CN)b]c complex.

TL;DR: In this paper, photo-assisted chemical oxidative polymerization of aniline in the presence of different dopant acids, and the radical scavenging ability of the produced PANI nanofibers was determined by the DPPH assay.

TL;DR: In this article, the reaction of 4-amino-1, 2, 4-triazole with sodium dichloroisocyanurate (SDCI) has been studied.

TL;DR: In this paper, the ability of various soy protein hydrolysates (SPHs) in binding calcium was investigated, and it was demonstrated that the amount of Ca-bound depended greatly on the SPHs obtained using different proteases, which included: neutrase, flavourzyme, protease M and pepsin.

TL;DR: A series of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles was synthesized expeditiously in good yields from o -phenylene- diamines and aldehydes in the presence of Fe(ClO 4 ) 3 without solvent at room temperature as mentioned in this paper.

TL;DR: In this article, an ion exchange method with aqueous potassium chloride solution was used for the dehydration of methyl lactate to methyl acrylate, and an improved yield of 37.9 mol% was achieved.

TL;DR: A triterpene glycoside, leucospilotaside A, along with a known saponin, isolated from sea cucumber Holothuria leucaspilota, and its structure was elucidated as 3β- O −[4- O -sodiumsulfate-β- d -quinovopyranosyl-(1 −→ −2)-β − d -xylopyranoyl]-holosta-22-ketone-9-en-17α,25α-diol (1 ) by extensive spectrosc

TL;DR: In this paper, a wide range of aromatic aldehydes easily undergo condensations with ethyl cyanoacetate and malononitrile in the commercial 95% ethanol in refluxing using PVC-TEPA as catalyst to afford the desired products of good purity in moderate to excellent yields.

TL;DR: In this article, a crosslinked chitosan-based nanofibers were successfully prepared via electrospinning technique with heat mediated chemical crosslinking followed, and the structure, morphology and mechanical property of nanofiber were characterized by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), Instron machine, respectively.

TL;DR: A new isochroman-4-one, 7, 8-dihydroxy-3-methylisochroman 4-one was isolated from water soluble fraction of Musa sapientum L. as discussed by the authors.

TL;DR: In this paper, two cyclic diarylheptanoids juglanin A (1) and Juglanin B (2) were isolated from the pericarps of Juglans regia L and their structures were elucidated by various spectroscopic methods including 2D NMR techniques.

TL;DR: A new antifungal antibiotic, fusarielin E, was isolated from the marine-derived fungus Fusarium sp.

TL;DR: Zhao et al. as discussed by the authors isolated two new flavone glycosides, isoetin-7-O-beta-D-glucopyranosyl-2'-O-alpha-L-arabinopyranoide (1) and isoetIN-7 O-beta -D-GLUCOPRANE (2'), from the aerial part of Taraxacum mongolicum and elucidated their structures mainly by spectral analyses.

TL;DR: In this paper, a facile one-pot synthesis of new 3-arylthieno[2,3d]pyrimidine-2,4(1H,3H)-diones via base-catalyzed cyclocondensation of ethyl 2-amino-4, 5-dimethylthiophene-3-carboxylate with aryl isocyanates is described.

TL;DR: In this article, a Nafion-H catalyzed, single step and environmentally friendly process for synthesis of dihydropyrimidinones is described, which has the advantages of reusability of the catalyst, high yields and ease of separation of pure products.

TL;DR: In this article, a highly efficient synthesis of 2-amino-N-substituted-benzamides was performed by the condensation of isatoic anhydride with several amines in solvent-free conditions under microwave irradiation.

TL;DR: A triterpenoid saponin named 16-oxoplatycodin D was isolated from the roots of Platycodon grandiflorum as mentioned in this paper.