An Efficient Synthesis of Unsymmetrical Dithioacetals from Sulfoxides and Thiols by the Magnesium Amide-Induced Pummerer-Type Reaction
作者:Kazuhiro Kobayashi、Masataka Kawakita、Hideki Akamatsu、Osamu Morikawa、Hisatoshi Konishi
DOI:10.1246/bcsj.69.2645
日期:1996.9
It has been found that the reactions of sulfoxides bearing hydrogen(s) at the α-position (R1SOCHR2R3: R1 = alkyl or Ph; R2 = H, alkyl, or Ph; R3 = H or Me) with thiols (R4SH: R4 = alkyl or aryl) in the presence of the (diisopropylamino)magnesium reagent, generated in situ from the reaction of ethylmagnesium bromide and diisopropylamine, in diethyl ether gave unsymmetrical dithioacetals (R1SCR2R3SR4)
已经发现,在 α 位带有氢的亚砜(R1SOCHR2R3:R1 = 烷基或 Ph;R2 = H、烷基或 Ph;R3 = H 或 Me)与硫醇(R4SH:R4 =烷基或芳基)在(二异丙基氨基)镁试剂存在下,由溴化乙基镁和二异丙胺反应原位生成,在乙醚中得到不对称的二硫代缩醛(R1SCR2R3SR4),分离产率为 44% 至 91%。