Asymmetric Synthesis and Enantioselectivity of Binding of 1-Aryl-1,2,3,4-tetrahydroisoquinolines at thePCP Site of theNMDA Receptor Complex
作者:Klaus Th. Wanner、Herbert Beer、Georg Höfner、Matthias Ludwig
DOI:10.1002/(sici)1099-0690(199809)1998:9<2019::aid-ejoc2019>3.0.co;2-t
日期:1998.9
A new method for the asymmetric synthesis of 1-substituted tetrahydroisoquinolines is presented. It is based on stereoselective addition reactions of organometallic compounds to the intermediate N-acyliminium ion 6, which is provided with an N-acyl group as a chiral auxiliary. In addition reactions with organomagnesium and organozinc reagents diastereoselectivities from 70:30 to 95:5 (for 7/8) were
提出了一种不对称合成 1-取代四氢异喹啉的新方法。它基于有机金属化合物与中间体 N-acyliminium 离子 6 的立体选择性加成反应,该中间体具有 N-酰基作为手性助剂。此外,观察到与有机镁和有机锌试剂的非对映选择性为 70:30 至 95:5(对于 7/8)的反应,通常使用锌试剂导致立体选择性显着提高。通过7和8的催化加氢并在去除手性助剂后得到目标化合物11和12。对映体纯的 11c-g 和 12c-g(ee > 99%),1-芳基-四氢异喹啉,评估了它们对 NMDA(N-甲基D-天冬氨酸)受体。在每种情况下,对映异构体 11 表现出比 12 更高的亲和力,对映异构体的效力相差 4 (11/12g) 至 27 (11/12c)。更有效的对映异构体 11 的绝对构型符合为 FR115427 (3) 发现的立体化学要求,它是一个接近的类似物。