(4R,5S,6R)-5-(tert-Butyl-dimethyl-silanyloxy)-2-diazo-4-methoxy-6-methyl-3-oxo-non-8-enoic acid ethyl ester 在
dirhodium tetraacetate 作用下,
以
二氯甲烷 为溶剂,
以62%的产率得到(3R,4S,5R)-5-Allyl-4-(tert-butyl-dimethyl-silanyloxy)-2-hydroxy-3-methoxy-5-methyl-cyclopent-1-enecarboxylic acid ethyl ester