Synthesis of optically active β-hydroxy-β-polyfluoromethyl GABAs
作者:Elena N. Shaitanova、Igor I. Gerus、Michael Yu. Belik、Valery P. Kukhar
DOI:10.1016/j.tetasy.2007.01.005
日期:2007.2
A general synthetic route to polyfluoromethyl containing analogues of GABA-beta-hydroxy-beta-tri- and difluoromethyl GABAs 9a and 9b was developed, using the corresponding beta-alkoxyvinyl polyfluoromethyl ketones-enones 1a and 1b as starting materials. Both enantiomers of the potential biologically active compound 9a were obtained by chiral resolution with (R)- or (S)-phenylethylamine: (c) 2007 Elsevier Ltd. All rights reserved.
New derivatives of trifluoroacetyl acetaldehyde and trifluoroaldol
作者:Ivan S. Kondratov、Igor I. Gerus、Aleksey D. Kacharov、Marina G. Gorbunova、Valery P. Kukhar、Roland Fröhlich
DOI:10.1016/j.jfluchem.2004.12.006
日期:2005.4
β-ethoxyvinyl trifluoromethyl ketone 1 with O-nucleophiles such as alcohols and diols leads to various derivatives of trifluoroacetyl acetaldehyde, such as β-alkoxyvinyl trifluoromethyl ketones 3 and cyclic keto acetals 4. Several derivatives synthesized contain chiral auxiliaries. Reduction of the compounds 1, 3, 4 under various reaction conditions leads to the trifluoroaldol derivatives 6, 7, 9, 10