2-acetyl-10,11-diacetoxy-3,4-(isopropylidenedioxy)-12-(3'-acetoxy-2',2'-dimethylpropan-1'-yloxy)-3(S*),4(R*),4a(S*),5-tetrahydronaphthacene 在
camphor-10-sulfonic acid 作用下,
以
水 、
丙酮 为溶剂,
反应 18.0h,
以63%的产率得到Acetic acid (9R,10S,10aR)-4-acetoxy-6-(3-acetoxy-2,2-dimethyl-propoxy)-8-acetyl-9,10-dihydroxy-9,10,10a,11-tetrahydro-naphthacen-5-yl ester