Preparation of chiral 4-benzyloxymethyldihydrofuran-2-one using lipase-catalyzed kinetic resolution: synthesis of (−)-Virginiae Butanolide C (VB C)
作者:Kunihiko Takabe、Nobuyuki Mase、Hidetoshi Matsumura、Takehiro Hasegawa、Yasuhiro Iida、Hisashi Kuribayashi、Kenji Adachi、Hidemi Yoda、Masato Ao
DOI:10.1016/s0960-894x(02)00458-4
日期:2002.9
Lipase-catalyzed kinetic resolution of the N,N-dialkyl-3-benzyloxymethyl-4-hydroxybutanamide 10a,b afforded the acetate 11a,b with (R) configuration, whereas the N-monoalkyl-3-benzyloxymethyl-4-hydroxybutanamide 10c-e gave the acetate 11c-e with (S) configuration. The butanamide 10 smoothly cyclized to give chiral 4-benzyloxymethyldihydrofuran-2-one 9 without racemization, which was effectively transformed
N,N-二烷基-3-苄氧基甲基-4-羟基丁酰胺10a,b的脂肪酶催化动力学拆分得到具有(R)构型的乙酸酯11a,b,而N-单烷基-3-苄氧基甲基-4-羟基丁酰胺10c-。 e得到具有(S)构型的乙酸酯11c-e。丁酰胺10平稳环化,得到手性4-苄氧基甲基二氢呋喃-2-酮9,而没有消旋作用,将其有效转化为高度立体控制的弗吉尼亚丁醇化物C(VB C)。