Rearrangements sigmatropiques [2.3] d'organomagnesiens formes par action de derives de grignard sur des dithioesters S-allyliques diversement substitues; synthese de dithioacetals de cetones β-ethyleniques
作者:Louis Leger、Monique Saquet、Andre Thuillier、Sylvestre Julia
DOI:10.1016/s0022-328x(00)91937-5
日期:1975.9
Dithioacetals of β-unsaturated ketones are obtained, by thiophilic addition of Grignard reagents to S-allylic dithioesters in tetrahydrofuran at low temperatures, followed by [2.3] sigmatropic rearrangement of the intermediate carbanion and methylation.
通过在低温下在四氢呋喃中将Grignard试剂向S-烯丙基二硫酯中进行硫键加成,然后进行[2.3]中间碳负离子的σ重排和甲基化,可得到β-不饱和酮的二硫缩醛。