乙酸酐 、
(4S,4aS,8S,8aR)-7-Benzyloxy-8-((1S,2R)-1,3-bis-benzyloxy-2-methoxy-propyl)-4-hydroxy-1-oxo-1,3,4,5,8,8a-hexahydro-2H-naphthalene-4a-carboxylic acid methyl ester 在
吡啶 作用下,
生成 (4S,4aS,8S,8aR)-4-Acetoxy-7-benzyloxy-8-((1S,2R)-1,3-bis-benzyloxy-2-methoxy-propyl)-1-oxo-1,3,4,5,8,8a-hexahydro-2H-naphthalene-4a-carboxylic acid methyl ester