(1R,5R,6R)-(5-isopropyl-2-methyl-6-vinylcyclohex-2-enyl)acetic acid 、 (+/-)-(3aS,4R,6S,6aR)-(6-methoxy-2,2,4-trimethyl-6-vinyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methanol 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
以
二氯甲烷 为溶剂,
反应 5.0h,
生成 (1R,3'aR,4'S,5R,6R,6'R,6'aS)-(5-isopropyl-2-methyl-6-vinylcyclohex-2-enyl)acetic acid 6'-methoxy-2',2',4'-trimethyl-6'-vinyltetrahydrofuro[3,4-d][1,3]dioxol-4-ylmethyl ester 、 (1R,3'aS,4'R,5R,6R,6'S,6'aR)-(5-isopropyl-2-methyl-6-vinylcyclohex-2-enyl)acetic acid 6'-methoxy-2',2',4'-trimethyl-6'-vinyltetrahydrofuro[3,4-d][1,3]dioxol-4-ylmethyl ester