异丁醛 、
(5aR,6S,9aS)-6,9a-Dimethyl-2-trimethylsilanyloxy-4,5,5a,6,7,8,9,9a-octahydro-naphtho[2,1-b]furan-6-carboxylic acid methyl ester 在
zinc(II) chloride 作用下,
以
甲苯 为溶剂,
反应 7.0h,
以4%的产率得到(5aR,6S,9aS)-methyl 6,9a-dimethyl-2-oxo-1,2,4,5,5a,6,7,8,9,9adecahydronaphtho[2,1-b]furan-6-carboxylate