(2S,4S,5R)-5-[(R)-((2R,3R)-1-Allyl-3-methoxy-4-oxo-azetidin-2-yl)-(tert-butyl-dimethyl-silanyloxy)-methyl]-pyrrolidine-2,4-dicarboxylic acid dimethyl ester 在
sodium methylate 作用下,
以
甲醇 为溶剂,
以55%的产率得到(1S,3S,6R,7R,8S,8aR)-7-Allylamino-8-(tert-butyl-dimethyl-silanyloxy)-6-methoxy-5-oxo-octahydro-indolizine-1,3-dicarboxylic acid dimethyl ester