作者:Lijian Chen、Young Mi Kim、David J. Kucera、Katheryn E. Harrison、Sogole Bahmanyar、Jill M. Scott、Daniel Yazbeck
DOI:10.1021/jo060057p
日期:2006.7.1
A Claisen rearrangement/ iodolactamization sequence starting from commercially available trifluoroacetaldehyde methyl hemiacetal, followed by a classical chemical resolution, provided enantiomerically pure 4,4-difluoro-3,3-dimethylproline (S)-1. No hazardous fluorination reagents were used, and the overall yield over 12 steps was greater than 28%.