methyl 5-methylidene-2-pyrrolidin-1-ylcyclohexene-1-carboxylate 、
2,2-Dimethyl-propionic acid (E)-6-(2,2-dimethyl-propionyloxy)-2-nitro-hex-2-enyl ester 以
二氯甲烷 为溶剂,
以39%的产率得到(1R,3S,4S,5R)-4-[3-(2,2-Dimethyl-propionyloxy)-propyl]-7-methylene-3-nitro-9-oxo-bicyclo[3.3.1]nonane-1-carboxylic acid methyl ester