Decarboxylation of fluorosulfones for the preparation fluoroalkylidene precursors
摘要:
The synthesis of fluorosulfones by alkylation of fluoroacetate derivatives is reported. Their decarboxylation reaction under Krapcho conditions is a convenient process to prepare fluorosulfones as reagents for fluoroalkene synthesis. (C) 2011 Elsevier B.V. All rights reserved.
The study of the Julia–Kocienski reaction between fluorinated arylsulfone and ketones is described. The corresponding fluoroalkenes were isolated in moderate to good yields from β- and δ-substituted cyclic ketones. From acyclic ketones and α-substituted cyclic ketones a decarbethoxylation reaction of the sulfonylesters occurred. This decarbethoxylation reaction opened a new route for the preparation
Convenientaccess to homochiral fluoroalkenes is described via a Julia–Kocienski olefination reaction. The required homochiral fluorosulfone is synthesized by a Mitsunobu reaction from readily available enantiopure secondary alcohols.
The synthesis of fluorosulfones by alkylation of fluoroacetate derivatives is reported. Their decarboxylation reaction under Krapcho conditions is a convenient process to prepare fluorosulfones as reagents for fluoroalkene synthesis. (C) 2011 Elsevier B.V. All rights reserved.