3-Alkoxycarbonyl-2-ethoxy-2-propenylidenetriphenylphosphorane reacts in turn with alkyl halides and aldehydes in the presence of base via a one-pot procedure to give moderate to good yields of conjugated enol ethers. Hydrolysis of the conjugated enol ethers and subsequent decarboxylation provide a novel route to α,β-unsaturated ketones.
在碱存在下,3-烷氧羰基-2-乙氧基-2-亚
丙烯基
三苯基膦通过一锅程序依次与烷基卤化物和醛发生反应,生成中等至高产率的共轭烯醇醚。共轭烯醇醚的
水解和随后的脱羧反应提供了一种获得 α、β-不饱和酮的新途径。