Stereoselective Synthesis of 3-Substituted Tetrahydropyrazinoisoquinolines via Intramolecular Cyclization of Enantiomerically Enriched Dihydro-2<i>H</i>-pyrazines
作者:Gianna Reginato、Maria Pia Catalani、Bernardo Pezzati、Romano Di Fabio、Andrea Bernardelli、Ornella Curcuruto、Elisa Moro、Alfonso Pozzan、Alessandro Mordini
DOI:10.1021/ol503431f
日期:2015.2.6
The preparation of 3-substituted tetrahydropyrazinoisoquinolines using the tributyltin hydride mediated intramolecular radical cyclization of suitably protected 2-substituted 3,4-dihydropyrazines is reported. The compounds are obtained as single enantiomers, as the relative configuration of the new generated stereogenic center is driven by the stereochemistry of the 2-substituted carbon in the starting
据报道,使用氢化三丁基锡介导的分子内自由基基团适当保护的2-取代的3,4-二氢吡嗪类化合物,可以制备3-取代的四氢吡嗪并异喹啉。这些化合物以单一对映体的形式获得,因为新生成的立体异构中心的相对构型是由原料中2-取代的碳的立体化学驱动的,而该原料又是天然存在的氨基酸。