A convenient method for the selective conversion of alkyl halides (R’X) to the olefins, R’CH=C(R)CH3, was established by α alkylation of the lithium salts of allylic dithiocarbamates (CH2=C(R)CH2SCSNMe2;R=H or Me) followed by reductive desulfurization of the α-coupled products with the specific Raney Ni. Dependence of regioselectivity in the reductive fission of the dithiocarbamate group upon both
通过烯丙基二
硫代
氨基甲酸锂盐 (
CH2=C(R) SCSNMe2) 的 α 烷基化,建立了一种将烷基卤 (R'X) 选择性转化为烯烃 R'CH=C(R)
CH3 的简便方法。 R=H 或 Me),然后用特定的 Raney Ni 对 α-偶联产物进行还原脱
硫。在一些细节中描述了二
硫代
氨基甲酸酯基团的还原裂变中区域选择性对底物和还原剂的依赖性。