Efficient synthesis of heterocyclic compounds using ethenetricarboxylic acid diesters
作者:Shoko Yamazaki、Yuko Iwata、Yugo Fukushima
DOI:10.1039/b818878e
日期:——
Ethenetricarboxylic acid diester 1a is a useful compound bearing two reactive sites, a CO2H group and a Michael acceptor. Reactions of 1a and reagents with oxygen and nitrogen nucleophilic moieties have been examined. The reaction of 1a with 2-aminoalcohols in the presence of EDCI and HOBt in one pot gave N,O-containing heterocyclic compounds, regioselectively. The stepwise method has also been carried
乙三羧酸二酯1a是有用的化合物,带有两个反应位,一个CO 2 H基团和一个迈克尔受体。的反应1A和试剂与氧和氮亲核部分已被检查。在EDCI存在下1a与2-氨基醇的反应霍比特 一锅给 ñ,Ô区域选择性地含有杂环化合物。还已经执行了逐步方法。脱保护ñ -Boc 保护的氨基酯,然后进行碱性水后处理,得到各种 1,4-恶嗪衍生品。O- TBS保护的酰胺的脱保护也会导致自发环化并提供1,4-恶嗪衍生品。它们具有与一锅法反应相反的区域化学。因此,可以制备酯或酰胺的区域异构体。这些合成方法代表了构建多种杂环系统(例如吗啉衍生的杂环)的新通用策略。