Oxidation of enamino-ketones. Formation of a new ring system, furo[2,3-b; 5,4-b′]dipyridine
Abstract
The oxidation of 3-acetyl-, 3-carboxamido-, and 3-ethoxycarbonyl-1,4,5,6-tetrahydropyridines occurs readily, resulting in the formation of dimeric products based on the furo[2,3-b;5,4-b′]dipyridine ring system.