Lewis Acid Mediated Intramolecular C–C Bond Formation of Alkyne-Epoxide Leading to Six-Membered Nitrogen and Oxygen Heterocycles
作者:Priya Ghosh、Pipas Saha、Somasekhar Bondalapati、Kiran Indukuri、Anil K. Saikia
DOI:10.1021/jo402550e
日期:2014.5.2
Intramolecular C–C bond formation of oxygen- and nitrogen-tethered alkynes and epoxide mediated by Lewis acid under ambient conditions is described. A simple procedure for the synthesis of 3,6- and 5,6-dihydropyrans and 3,4-dehydropiperidines from acyclic building blocks in good yields without using any transition metal is shown.
描述了在环境条件下由路易斯酸介导的氧和氮拴链炔烃和环氧化物的分子内C–C键形成。显示了一种从无环结构单元以高收率合成3,6-和5,6-二氢吡喃和3,4-脱氢哌啶的简单方法,无需使用任何过渡金属。