methyl (2R)-4'-chloro-3'-methoxy-4,5'-dioxospiro[1,3-benzodioxine-2,6'-cyclohexa-1,3-diene]-1'-carboxylate 、 以
二氯甲烷 为溶剂,
反应 96.0h,
以70%的产率得到methyl (1'S,2R,3'S,6'R,7'S)-7'-chloro-3'-hydroxy-4'-[(6S)-6-hydroxycyclohexen-1-yl]-8'-methoxy-6'-methyl-4-oxospiro[1,3-benzodioxine-2,2'-tricyclo[4.3.1.03,7]deca-4,8-diene]-1'-carboxylate