(3S,4aR,10aR)-5,7-Dimethoxy-1,2,3,4a,9,10a-hexahydro-10-oxa-4-aza-phenanthrene-3,4-dicarboxylic acid 4-benzyl ester 3-methyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
反应 1.5h,
以100%的产率得到(3S,4aR,10aR)-5,7-dimethoxy-1,3,4,4a,9,19a-hexahydro-2h-10-oxa-4-aza-phenanthrene-3-carboxylic acid methyl ester