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.