Methylation of α,β,γ,δ-unsaturated-β-substituted enol phosphates with lithium dimethyl cuprate gave a mixture of (2E,4E)- and (2Z,4E) alkyl 3-methylalka-2,4-dienoates and unsubstituted alkyl alka-2,4-dienoates. An improved synthesis is described for ethyl β-safranate and the insect growth regulator hydroprene.
α,β,γ,δ-不饱和-β-取代的烯醇
磷酸盐与二甲基
铜酸
锂的甲基化得到(2 E,4 E)-和(2 Z,4 E)烷基3-甲基烷基-2,4-的混合物二烯酸酯和未取代的烷基2,4-二烯酸酯。描述了β-
氨基磺酸乙酯和昆虫生长调节剂
丁二烯的改进的合成方法。