Synthesis of (Z)-fluoroalkene dipeptide isosteres utilizing organocopper-mediated reduction of γ,γ-difluoro-α,β-enoates
摘要:
gamma,gamma -Difluoro-alpha,beta -enoates are reduced with organocopper reagents to afford the corresponding gamma -fluoro-beta,gamma -enoates. This organocopper-mediated reduction was applied to the synthesis of (Z)-fluoroalkene dipeptide isosteres. (C) 2000 Elsevier Science Ltd. All rights reserved.
developed a new methodology for the asymmetric Reformatsky-type reaction of (−)-menthyl bromodifluoroacetate (2) with imine in the presence of RhCl(PPh3)3. Ester 2 with the cost-effective chiralauxiliary gave (S)-difluoro-β-lactams in moderate to good yields and high diastereoselectivities through spontaneous removal of the auxiliary.