Thus, treatment of 4 - pentenals with methoxy methylenetriphenylphosphin afforded a mixture of cis - and trans - enol ethers, which were oxidized by PCC to give methyl 5 - hexenates.

• 用甲氧基甲基三苯基膦处理4-戊烯醛类化合物生成烯基醚,PCC氧化所生成的烯醚则得到标题化合物,5-己烯酸甲酯类化合物。