Base-Mediated Regio- and Stereoselective Intermolecular Addition of Alkynes to <i>N</i>-Heterocycles
作者:Akhilesh Kumar Verma、Megha Joshi、Ved Prakash Singh
DOI:10.1021/ol200048z
日期:2011.4.1
The regio- and stereoselective addition of N-heterocycles to alkynes using KOH is reported. Formation of (Z)-isomers and their conversion to (E)-products were found to be dependent upon time as well as the choice of base. Selective attack of N-heterocycles on a more electrophilic alkynyl carbon was supported by DFT calculations, and the stereochemistry of the products was established by X-ray crystallographic
据报道,使用KOH将N-杂环区域和立体选择性地加成到炔烃上。发现(Z)-异构体的形成及其向(E)-产物的转化取决于时间以及碱基的选择。DFT计算支持了N杂环对更具亲电性的炔碳的选择性攻击,并通过X射线晶体学研究和邻卤代炔烃在吲哚-[2,1- a ]异喹啉中的分子内环化作用建立了产物的立体化学。。