Microwave-Assisted Synthesis of Heterocycles by Rhodium(III)-Catalyzed Annulation of <i>N</i>
-Methoxyamides with α-Chloroaldehydes
作者:Ji-Rong Huang、Carsten Bolm
DOI:10.1002/anie.201710776
日期:2017.12.11
α‐Chloroaldehydes have been used as alkyne equivalents in rhodium‐catalyzed syntheses of isoquinolones and 3,4‐dihydroisoquinolins starting from N‐methoxyamides. Compared to the existing technology, a complementary regioselectivity is achieved. Mechanistic investigations have been performed, and it was found that steric effects of both substrate and additive determine the product selectivity. Various
α-氯醛已被用作铑的异喹诺酮和3,4-二氢异喹啉从N-甲氧基酰胺开始的炔烃等效物。与现有技术相比,实现了互补的区域选择性。已经进行了机理研究,并且发现底物和添加剂两者的空间效应决定了产物的选择性。各种其他杂环,例如异喹啉和内酯,可以通过转化获得的产物来制备。