is easily accessible by cyclocondensation of δ-oxoester 1 with (R)-phenylglycinol, a three-step synthetic route to enantiopure 1-substituted tetrahydroisoquinolines, including 1-alkyl-, 1-aryl-, and 1-benzyltetrahydroisoquinoline alkaloids, as well as the tricyclic alkaloid (–)-crispine A, has been developed. The key step is a stereoselective α-amidoalkylation reaction using the appropriate Grignard
从
三环内酰胺 2 开始,通过 δ-氧代酯 1 与 (R)-苯基甘
氨醇的环缩合很容易获得,这是一种三步合成路线,可合成对映纯的 1-取代
四氢异喹啉,包括 1-烷基-、1-芳基-和 1 -苄基
四氢异喹啉生物碱,以及
三环生物碱 (-)-crispine A,已被开发出来。关键步骤是使用合适的
格氏试剂进行立体选择性 α-酰胺烷基化反应。