Abstract
The high diastereoselective synthesis of chiral difluoro-β-lactams (3) was attained by treatment of ethyl bromodifluoroacetate (1), 2-hydroxy-l-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.
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