Acetic acid (3R,4R,4aR,5R,6R,8aR)-6-acetoxy-4-acetylamino-8-hydroxy-3-methyl-1-oxo-octahydro-isochromen-5-yl ester 在
对甲苯磺酸 作用下,
以
苯 为溶剂,
反应 3.0h,
以74%的产率得到Acetic acid (3R,4R,4aR,5R,6R)-6-acetoxy-4-acetylamino-3-methyl-1-oxo-3,4,4a,5,6,7-hexahydro-1H-isochromen-5-yl ester