Showing papers in "Journal of Fluorine Chemistry in 1988"

TL;DR: In this article, a new solid-liquid phase-transfer technique was used to synthesize aryl difluoromethyl ethers and thioethers in the presence of tris-(3,6-dioxaheptyl)amine.

TL;DR: Fluorination of pyrazole-4-carboxylates with poly(hydrogen fluoride)-pyridine-triethylamine complex under electrolytic anodic oxidation yielded new ethyl 1-methyl-5-fluoropyrazole 4 carboxylate and its 3-chloro analogue.

TL;DR: The reaction of zinc amalgam with ethyl bromodifluoroacetate in triglyme provides a useful route to a stable α, α-difluor zinc reagent.

TL;DR: In this paper, the effect of fluoride, F -, on the formation and stability of the apatites, with and without the simultaneous presence of some cations M* (M* = Al 3+, Mg 2+, Sr 2+ or Zn 2+ ) in the solution were investigated.

TL;DR: In this paper, the authors examined the reaction of Iodo-and bromodifluoromethane with cadmium powder in DMF at room temperature, and showed that the resulting mixture exhibits excellent thermal stability to temperatures of 65-75 °C and rapid decomposition does not occur until 105 °C.

TL;DR: In this paper, the electronic effect of trifluoromethyl group on the stability of isoxazolines and -aziridines is discussed on the basis of their electronic properties.

TL;DR: Fluoropyridines were prepared in high yields by the diazotization of aminopyridine in HF or HF-pyridine solutions, followed by dediazoniation in situ at 20 - 60 °C as mentioned in this paper.

TL;DR: In this paper, the catalytic activity of enzymes, lipasePL 266 and lipaseAL 865, from Achromobacter and Alcaligenes sp, in organic media has been found.

TL;DR: In this paper, the authors used SbF 5 for dehydrofluorination in synthesis of fluorinated mono-enes and di-enes, and gave information relating to mechanism of cross-linking of the polymer and indications of factors that limit its working life.

TL;DR: In this article, a new method for the preparation of trifluoromethylketones, as an alternative to the use of organometallics, was reported, based on the condensation of phosphonium ylides with trimethylsilyl triffluoroacetate.

TL;DR: In the presence of tetrakis(triphenylphosphine)nickel, fluoroalkylation reactions of aniline and its derivatives occur under mild conditions, giving good yields of the corresponding o- and p-fluoroalkylaniline.

TL;DR: A simple and economical domestic defluoridation process has been evolved in this article, which consists of mixing raw water with required quantity of saturated filter alum solution, adding some coagulant aids is found to hasten sedimentation of floccules.

TL;DR: In this paper, a radical chain-reaction mechanism induced by single electron transfer (SET) was proposed, which can be suppressed with p-dinitrobenzene (p-DNB) or di-t-butylnitroxide.

TL;DR: In this article, the authors showed that F -alkyl iodides readily reacted with a variety of alkenes in methanol at room temperature under the influence of metallic tin(0)-silver(I) acetate and metallic tin (0)-copper (I) chloride to afford the corresponding addition products, F - alkylated iodides, in good to excellent yields.

TL;DR: In this article, the fluorination reactions of (C 6 F 5 ) 3 E (E = As, Sb) with elemental flourine yield fluorine compounds with high yields.

TL;DR: In this article, the 19F and 31P-n.m.r. spectra of aryldifluorophosphines are presented and discussed, and the fragmentation pathway of the platinum(II) complexes in their mass spectra has been deduced.

TL;DR: Fluoride ion as the tetrabutylammonium salt displaces bromide in para-substituted benzyl bromides in acetonitrile or dimethylformamide using p-bromomethyl benzoyl group coupled to amino groups, including peptide amino groups via its N-hydroxysuccinimide ester.

TL;DR: An S RN 1 reaction, initiated by single electron transfer from magnesium, provides an efficient method for the regioselective synthesis of 2-fluoroalkylpyrroles from pyrrole and the corresponding fluoro-alkyl iodides as discussed by the authors.

TL;DR: Aryl F -alkyl ketones smoothly reacted with a variety of dialkyl phosphites in the presence (or absence) of a tertiary amine to give the corresponding dialkyyl aryl(F-alkyl)methyl phosphates in high yields.

TL;DR: In this article, a computer of the butane over cobalt trifluoride was only partially successful, perhaps because the fluorination proceeded in part by simple F for H replacement and in part via alkenes: the model only allowed for the former.

TL;DR: In this article, a trifluoromethanesulphonate (triflate) triflate was used as an electrophilic fluorinating agent for quinuclidine.

TL;DR: In this paper, the 19 F nmr pulsed field gradient technique is applied to study molecular self-diffusion of fluorine containing molecules adsorbed on zeolites.

TL;DR: In this article, the reaction of N-polyfluorophenylcarbonimidoyl dichlorides with primary and secondary aliphatic and aromatic amines has been studied.

TL;DR: In this article, an intermediate product of the disproportionation of Ph 2 P-PF 2 Ph 2 has been identified by means of 19 F-and 31 P-NMR spectroscopy.

TL;DR: In this article, the optimum change in the properties is considered to be achieved by inserting 1-3 fluorine atoms into the molecule, which is known to lead to compounds with a markedly higher activity.

TL;DR: A method for the synthesis of mixed fluorinated and hydrogenated derivatives: the bicyclo [2· 2· 1] hept-2-enes with long chains C n F 2n+1 (n = 4,6,8 and 10) is described in this article.

TL;DR: In this article, the structure of Me 2 NSF 3 was determined by electron diffraction and the mechanism of its reaction with SO 2 was discussed, and the structure was shown to be stable.

TL;DR: Fluorine is found not only in all kinds of rocks, igneous and sedimentary, and in water in various amounts, but also in many organisms as discussed by the authors, but in some cases weathering of volcanic rocks, specially volcanic rocks increases its amount.

TL;DR: In this paper, new fluorinated monomers and polymers containing the fluorosulfonyl group have been prepared and characterized via the reaction of β-fluorosultones with polyvinyl and allyl alcohols.