Synthesis of 1,3-Diynes via Cadiot–Chodkiewicz Coupling of Volatile, in Situ Generated Bromoalkynes
作者:Phil C. Knutson、Haleigh E. Fredericks、Eric M. Ferreira
DOI:10.1021/acs.orglett.8b02975
日期:2018.11.2
A convenient Cadiot–Chodkiewicz protocol that facilitates the use of low molecular weight alkyne coupling partners is described. The method entails an in situ elimination from a dibromoolefin precursor and immediate subjection to copper-catalyzed conditions, circumventing the hazards of volatile brominated alkynes. The scope of this method is described, and the internal 1,3-diyne products are preliminarily
描述了一种方便的 Cadiot–Chodkiewicz 方案,该方案有利于使用低分子量炔烃偶联伙伴。该方法需要从二溴烯烃前体中原位消除并立即置于铜催化条件下,从而避免了挥发性溴化炔烃的危害。描述了该方法的范围,并对钌催化的叠氮化物-炔环加成反应中的内部1,3-二炔产物进行了初步评估。