Fluorine-containing organozinc reagents - VI. The preparation of α-Trifluoromethyl-α,β-unsaturated carboxylic acid esters
摘要:
The Reformatzky reaction of the readily available methyl 2,2-dichloro-3,3,3-trifluoropropionate with aldehydes followed by acylation and reductive elimination in situ constitutes a general synthetic scheme for the preparation of methyl alpha-trifluoromethyl-alpha, beta-unsaturated carboxylates, useful as fluorine-containing building blocks.
The electrophilic thionation and chlorination of polyfluorinated α-Keto esters
作者:Kazimir I. Pashkevich、Victor I. Saloutin、Maksim B. Bobrov
DOI:10.1016/s0022-1139(00)81042-8
日期:1988.12
The methyl ester of trifluoropyruvic acid reacts with phosphoruspentachloride at the keto carbonyl as well as at the ester carbonyl group. The reaction of polyfluorinated α-keto esters with Davy's reagent occurs regioselectively at the keto carbonyl and is accompanied by reduction and thiomethylation.