Reactions of furazano[3,4‐<i>b</i>]quinoxalines with phosphorus ylides and an unusual oxidative transformation of the transylidation product

Abstract

Abstract Reactions of furazano[3,4‐ b ]quinoxalines 1 with phosphorus ylides 2 afford the transylidation product 3 and/or 4,9‐dihydrofurazano[3,4‐ b ]quinoxalines 4. Oxidation of 3 with phenyliodide bis‐trifluoroacetate gave the fused furan derivative 13 in high yield.