The Wittig reaction of perfluoro acid derivatives: access to fluorinated enol ethers, enamines, and ketones
摘要:
The preparation of novel perfluoroalkyl-substituted compounds in good yields is described. This preparation involves the Wittig reaction of a phosphonium ylide with perfluoroalkyl acid derivatives. The influence of the structure of the starting alkylidenetriphenylphosphoranes, the perfluoroalkyl reagents, and the reaction conditions has been investigated. Trifluoroacetamides lead to a Z/E mixture of enamines 3. Perfluoroalkyl esters (Rf = CF3, C2F5, C3F7, C7F15, CF2Cl) lead to only the (Z)-enol ethers 8-12 when reactions are performed with NaNH2 as a base and to 1-perfluoroalkyl ketones 13-17 when reactions are performed with BuLi.
Regioselective ring opening of various substituted perfluoroepoxy ethers was achieved with magnesium bromide, leading to new α-bromofluoroalkyl ketones in good yields.
The present invention is directed to tricyclic indole derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders and conditions modulated by endothelial lipase, for example, cardiovascular disorders.
A short, selective and general route to α-amino trifluoromethyl ketones and corresponding alcohols is described via an easy epoxidation of 1-CF3 enol ethers followed by an opening with various secondary amines.
WITTIG OLEFINATION OF PERFLUOROALKYL CARBOXYLIC ESTERS; SYNTHESIS OF 1,1,1-TRIFLUORO-2-ETHOXY-5-PHENYLPENT-2-ENE AND 1-PERFLUOROALKYL EPOXY ETHERS: 1,1,1-TRIFLUORO-2-ETHOXY-2,3-EPOXY-5-PHENYLPENTANE
作者:Bégué, Jean-Pierre、Bonnet-Delpon, Danièle、Kornilov, Andrei、Liu, Yugang、Boeckman, Robert K.
DOI:10.15227/orgsyn.075.0153
日期:——
α-Trifluoromethyl α-Ethoxy β-Vinyl Anions: Stereoselective Route to Hindered β-Ethoxy Allylic Alcohols and Crotonates
作者:Danièle Bonnet-Delpon、Denis Bouvet、Michèle Ourévitch、Michael H. Rock