丁酸酐 、 (3S,3aR,4S,6S,6aR,7S,8S,9bS)-6-(butyryloxy)-3,3a,4-trihydroxy-3,6,9-trimethyl-8-(((Z)-2-methylbut-2-enoyl)oxy)-2-oxo-2,3,3a,4,5,6,6a,7,8,9b-decahydroazuleno[4,5-b]furan-7-yl octanoate 在
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以90%的产率得到[(3S,3aR,4S,6S,6aR,7S,8S,9bS)-4,6-di(butanoyloxy)-3,3a-dihydroxy-3,6,9-trimethyl-8-[(Z)-2-methylbut-2-enoyl]oxy-2-oxo-4,5,6a,7,8,9b-hexahydroazuleno[4,5-b]furan-7-yl] octanoate