Syntheses of Heterocycles by Intramolecular Acylation of Nitrile‐Hydrogen Halide Adducts

Abstract
Five‐membered, six‐membered, and seven‐membered aza‐, diaza‐, and thiazaheterocycles can be prepared by cyclization of. ω‐cyano carboxylic acid halides in the presence of hydrogen halides in aprotic solvents. Nitrile‐hydrogen halide adducts occur as intermediates in this novel heterocycle synthesis of wide application. The acylating cyclizations of nitriles in protonic media, which proceed via imidic esters or amides, are not discussed.

This publication has 32 references indexed in Scilit: