Results 51 to 60 of about 273,185 (175)

Organocatalytic asymmetric fluorination of α-chloroaldehydes involving kinetic resolution

Beilstein Journal of Organic Chemistry, 2014
In a previous study it was shown that the enantioselective α-fluorination of racemic α-chloroaldehydes with a chiral organocatalyst yielded the corresponding α-chloro-α-fluoroaldehydes with high enantioselectivity.
Kazutaka Shibatomi, Takuya Okimi, Yoshiyuki Abe, Akira Narayama, Nami Nakamura, Seiji Iwasa   +5 more
doaj   +1 more source

Introduction of Fluorine and Fluorine-Containing Functional Groups [PDF]

, 2013
Over the past decade, the most significant, conceptual advances in the field of fluorination were enabled most prominently by organo- and transition-metal catalysis.
Neumann, C., Ritter, T., Liang, Theresa, Liang, T., Ritter, Tobias, Neumann, Constanze N.   +5 more
core   +2 more sources

Deoxygenative gem-difluoroolefination of carbonyl compounds with (chlorodifluoromethyl)trimethylsilane and triphenylphosphine

Beilstein Journal of Organic Chemistry, 2014
Background: 1,1-Difluoroalkenes cannot only be used as valuable precursors for organic synthesis, but also act as bioisosteres for enzyme inhibitors. Among various methods for their preparation, the carbonyl olefination with difluoromethylene phosphonium
Fei Wang, Lingchun Li, Chuanfa Ni, Jinbo Hu   +3 more
doaj   +1 more source

A novel family of (1-aminoalkyl)(trifluoromethyl)- and -(difluoromethyl)phosphinic acids – analogues of α-amino acids

Beilstein Journal of Organic Chemistry, 2014
A series of novel (1-aminoalkyl)(trifluoromethyl)- and -(difluoromethyl)phosphinic acids – analogues of proteinogenic and nonproteinogenic α-amino acids were prepared.
Natalia V. Pavlenko, Tatiana I. Oos, Yurii L. Yagupolskii, Igor I. Gerus, Uwe Doeller, Lothar Willms   +5 more
doaj   +1 more source

1-((Dimethyl(3-((2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctyl)oxy)propyl)silyl)oxy)-3,5,7,9,11,13,15-heptakis((dimethylsilyl)oxy)-octasilsesquioxane

Molbank
The title compound was synthesized using Pt-catalyzed hydrosilylation of octasilane POSS and allyl 1H,1H-perfluorooctyl ether. The purity and structure were determined by NMR (1H, 13C, 19F, 29Si), and MALDI TOF-MS.
Analise C. H. Migliaccio, Andrea R. Kelley, Scott T. Iacono   +2 more
doaj   +1 more source

Aplicações sinteticas de enzimas imobiliadas em organo-gel e gel de agar [PDF]

, 1997
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.As microemulsões água-em-óleo (água + óleo + surfactante) podem ser utilizadas para formar géis elásticos e termoreversíveis pela adição de gelatina.
Queiroz, Neide
core  

Cu-catalyzed trifluoromethylation of aryl iodides with trifluoromethylzinc reagent prepared in situ from trifluoromethyl iodide

Beilstein Journal of Organic Chemistry, 2013
The trifluoromethylation of aryl iodides catalyzed by copper(I) salt with trifluoromethylzinc reagent prepared in situ from trifluoromethyl iodide and Zn dust was accomplished.
Yuzo Nakamura, Motohiro Fujiu, Tatsuya Murase, Yoshimitsu Itoh, Hiroki Serizawa, Kohsuke Aikawa, Koichi Mikami   +6 more
doaj   +1 more source

Oxidative 3,3,3-trifluoropropylation of arylaldehydes

Beilstein Journal of Organic Chemistry, 2013
A reaction between (E)-trimethyl(3,3,3-trifluoroprop-1-en-1-yl)silane (1) and arylaldehydes 2 was triggered by fluoride anions to afford aryl 3,3,3-trifluoropropyl ketones 3 in moderate to good yield.
Akari Ikeda, Masaaki Omote, Shiho Nomura, Miyuu Tanaka, Atsushi Tarui, Kazuyuki Sato, Akira Ando   +6 more
doaj   +1 more source

Prins fluorination cyclisations: Preparation of 4-fluoro-pyran and -piperidine heterocycles

Beilstein Journal of Organic Chemistry, 2010
The Prins reaction was investigated using BF3·OEt2 as a Lewis acid. It has been recently demonstrated, that if BF3·OEt2 is used in stoichiometric amounts then these reactions generate fluorinated products where the BF3·OEt2 contributes fluoride ion to ...
Guillaume G. Launay, Alexandra M. Z. Slawin, David O'Hagan   +2 more
doaj   +1 more source

Reaction of 2,2,4,4-tetrakis(trifluoromethyl)-1,3-dithiethane with N-vinyl compounds

Beilstein Journal of Organic Chemistry, 2013
The reaction of hexafluorothioacetone dimer (2,2,4,4-tetrakis(trifluoromethyl)-1,3-dithiethane, 1) with vinylamides leads to the rapid formation of [2 + 2] cycloadducts: 4-amino-2,2-bis(trifluoromethyl)thietanes.
Viacheslav A. Petrov, Will Marshall
doaj   +1 more source