作者:Eiji Kawahara、Mikio Fujii、Yoshiteru Ida、Hiroyuki Akita
DOI:10.1248/cpb.54.387
日期:——
Direct β-glucosidation between (−)-myrtenol and nerol and D-glucose (3) using the immobilized β-glucosidase from almonds with the synthetic prepolymer ENTP-4000 gave myrtenyl O-β-D-glucoside (4) and neryl O-β-D-glucoside (10), respectively. The coupling of the myrtenyl or neryl O-β-D-glucopyranoside congeners (7 or 13) and 2,3,4-tri-O-benzoyl-β-L-arabinopyranosyl bromide (8) afforded the coupled products (9 or 14), respectively. Deprotection of the coupled products (9 or 14) afforded the synthetic myrtenyl 6-O-α-L-arabinopyranosyl-β-D-glucopyranoside (Sacranoside A, 1) or neryl 6-O-α-L-arabinopyranosyl-β-D-glucopyranoside (Sacranoside B, 2), respectively.
使用来自杏仁的固定化 β-葡萄糖苷酶和合成预聚物 ENTP-4000,在 (−)-桃金娘醇和橙花醇以及 D-葡萄糖 (3) 之间进行直接 β-葡萄糖苷化,得到桃金娘烯基 O-β-分别为 D-葡萄糖苷 (4) 和橙花基 O-β-D-葡萄糖苷 (10)。桃金娘基或橙花基 O-β-D-吡喃葡萄糖苷同系物(7 或 13)与 2,3,4-三-O-苯甲酰基-β-L 的偶联-阿拉伯吡喃糖基溴(8)分别提供偶联产物(9或14)。偶联产物 (9 或 14) 的脱保护得到合成的桃金娘基 6-O-α-L-arabinopyranosyl-β-D-glucopyranoside (Sacranoside A, 1) 或分别为橙花基 6-O-α-<小>L小>-阿拉伯吡喃糖基-β-<小>D小>-吡喃葡萄糖苷(Sacranoside B,2)。