Novel strategy for the synthesis of fluorinated β-amino acid derivatives from Δ2-oxazolines
摘要:
Racemic and chiral non-racemic beta -fluoroalkyl-beta -amino acid derivatives have been prepared in two steps starting from 2-alkyl-Delta (2)-oxazolines and fluorinated imidoyl chlorides. Subsequent chemoselective reduction of the C-masked beta -enamino acid derivatives initially formed provided the target beta -amino acids. The process takes place with total chemoselectivity, high yields and satisfactory diastereoselectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.