Stereoselective Synthesis of α-fluoro-β-trifluoromethyl-α,β-unsaturated Esters by Horner-Wadsworth-Emmons Coupling
作者:Shainaz Landge、Bela Torok
DOI:10.2174/1570178611666140124001052
日期:2014.4
α-Fluoro-β-trifluoromethyl-α,β-unsaturated esters were synthesized via the reaction of diethyl (1-fluoro-1-
carbethoxymethyl) phosphonate with a variety of aromatic/heterocyclic trifluoromethyl ketones and trifluoroacetaldehyde
ethyl hemiacetal by the Horner-Wadsworth-Emmons (HWE) coupling. The effect of base, solvent, as well as reactant ratio
has been investigated. The present method is highly stereoselective, attractive and convenient for the synthesis of the
target compounds due to the availability of the reagents, simplicity of the approach and good yields of the products.
Preparation of trifluoromethylated allylic alcohols from trifluoroacetaldehyde and organometallic compounds
作者:Nobuo Ishikawa、Gyu Koh Moon、Tomoya Kitazume、Kwon Choi Sam
DOI:10.1016/s0022-1139(00)83162-0
日期:1984.4
A number of allylic alcohols bearing a trifluoromethyl group at the α- or γ-position, and α-trifluoromethylated γ-enols and -ynols were prepared by the reaction of trifluoroacetaldehyde with a variety of organometalliccompounds. Most of the Reformatsky- or Grignard-type reactions required promotion by ultrasonic irradiation.