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1引言毕富春等曾报道二氯菊酸－1－氰基－2－甲基－2－戊烯醇酯的气相色谱分离，但使用的样品是二氯菊酸－1－氰基－2－甲基－2－成烯醇酯的各个异构体的混合物，而且未加详细讨论。年文在合成光学活性二氯菊酯－（±）－1－氰基2－甲基－2－戊烯酸酯和（－）－1－氰基－2－甲
1 Introduction Bi Fuchun et al. Reported the gas chromatographic separation of 1-cyano-2-methyl-2-pentenol bisulfate, except that the sample used was 1-cyano-2- The mixtures of the individual isomers of 2-enol esters are not discussed in detail. In the synthesis of optically active permethrin - (±) -1-cyano 2-methyl-2-pentenoate and (-) - 1-cyano-