The Diastereoselective Synthesis of Difluoro-b-lactam Using Reformatsky-Honda Reaction
摘要:
The high diastereoselective synthesis of chiral difluoro-beta-lactams (3) was attained by treatment of ethyl bromodifluoroacetate (1), 2-hydroxy-1-phenylethyl group substituted imines (2) and diethylzinc in the presence of rhodium-catalyst. The absolute configuration of 3 was determined by X-ray analysis of 3,5-dinitrobenzoate (6) derived from 3.
The high diastereoselective synthesis of chiral difluoro-beta-lactams (3) was attained by treatment of ethyl bromodifluoroacetate (1), 2-hydroxy-1-phenylethyl group substituted imines (2) and diethylzinc in the presence of rhodium-catalyst. The absolute configuration of 3 was determined by X-ray analysis of 3,5-dinitrobenzoate (6) derived from 3.