The stereostructure of (+)-roemecarine, a new 1-benzyl-1, 2, 3, 4-tetrahydroisoquinoline having a hydroxyl group at the 4-position, was confirmed to be 1, 4-trans by synthesis of (±)-epiroemecarine (1) and (±)-roemecarine (5) via o-quinol acetates of isocodamine (4). Furthermore, (+)- and (-)-roemecarine (5) were synthesized in good chemical and optical yields by kinetic resolution of (±)-4-O-acetyl- (3) or (±)-4, 6-O, O-diacetylroemecarine (7) by the use of immobilized lipase OF-360 (Candida cylindracea) in organic solvents. (+)-Roemecarine (5) was proved to have 1S, 4S-configuration.
(+)-罗美
卡因是一种新的 1-苄基-1,2,3,4-
四氢异喹啉,在 4-位上有一个羟基,通过异可达明(4)的邻喹醇
乙酸酯合成(±)-表罗美
卡因(1)和(±)-罗美
卡因(5),证实了(+)-罗美
卡因的立体结构是 1,4-反式。此外,利用固定化
脂肪酶 OF-360(圆柱形念珠菌)在有机溶剂中对(±)-4-O-乙酰基-(3)或(±)-4, 6-O, O-
二乙酰基罗汉松(7)进行动力学解析,以良好的
化学和光学产率合成了(+)-和(-)-罗汉松(5)。(+)-Roemecarine (5) 被证明具有 1S、4S 构型。