Acetic acid (1R,3R,4R,4aR,7R,9aS)-4a-formyl-7-hydroxy-4-isopropyl-1,7-dimethyl-octahydro-5,6-dioxa-benzocyclohepten-3-yl ester 在
三氟乙酸 作用下,
以
正己烷 为溶剂,
反应 4.0h,
以42%的产率得到Acetic acid (1R,2R,3R,5R,6S,9R)-12-hydroxy-2-isopropyl-5,9-dimethyl-10,11,13-trioxa-tricyclo[7.2.2.0
1,6]tridec-3-yl ester