One-pot synthesis of novel ether-linked diisoxazole derivatives via sequential O-propargylation and 1,3-dipolar cycloaddition from 2-bromohomoallylic alcohols

Abstract

A simple and efficient, one-pot approach for the synthesis of ether-linked diisoxazole derivatives has been developed through sequential reactions, which includes O-propargylation of 2-bromohomoallylic alcohols with propargyl bromide in the presence of sodium hydride in THF, and 1,3-dipolar cycloaddition by the addition of hydroximinoyl chlorides and triethylamine. This protocol provides some advantages such as high regioselectivity, easy operation and good product yields with a wide scope of substrates under mild conditions.