N-(2-propenyl)-N-[[[(2-butenyloxy)carbonyl]-N'-(4-methoxybenzyl)-amino]sulfonyl]-(S)-phenylalanine methyl ester 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 作用下,
以
1,2-二氯乙烷 为溶剂,
以87%的产率得到(2S)-2-[3-(4-methoxy)benzyl-2,4,4-trioxo-3,4,9,10-tetrahydro-2H,6H-4λ
6-[1,4,3,5]oxathiadiazecin-5-yl]-3-phenyl-propionic acid methyl ester