Synthesis of difluorinated β- and γ-amino acids: Investigation of a challenging deoxyfluorination reaction
摘要:
Backbone-homologated amino acids containing the vicinal difluoride motif have been synthesised in a highly stereoselective manner. The key synthetic transformation is the DeoxoFluor (R)-mediated fluorination of a vicinal fluorohydrin. The synthetic route is amenable to the production of all possible stereoisomers of alpha,beta-difluoro-gamma-aminobutyric acid. In addition, a novel difluoromethyl-substituted beta-amino acid is accessed via an unexpected rearrangement process. (C) 2012 Elsevier B.V. All rights reserved.