【摘要】 用具有不同烷硫基的2－双烷硫基亚甲基－5，5－二甲基－1，3－环已二酮与烯丙基、2－甲基烯丙基、苯基卤化镁等Grignard试剂反应，对加成反应取向进行了初步考察．2－双烷流基亚甲基－5，5－二甲基－1，3－环已二酮与烯丙基和2－甲基烯丙基的加成均得到1，2－加成产物；2－二甲硫基亚甲基－5，5－二甲基－1，3－环已二酮与苯基溴化镁反应可得1，4－加成产物．更多还原

【Abstract】 The orientation on the addition reaction of 2 - dialkythiomethylene - 5, 5 -dimethyl - 1, 3 - cyclohexadione - which with the different dialkylthio group enclonding dimethylthio, 1, 2 - ethylenedithio and 1, 3 - propylidenedithio - with Grignard reagents was studied preliminarily. The results for the addition showd that the orientation is similar as the common α - oxo ketene dithioacetals. 1, 2 - addition preducts were obtained with allyl and methyllyl Grignard reqents to the different dialkylthio groups. An 1,4 - addition product was prepared when 2 - dimethylthio methylene - 5, 5 - dimethy 1 - 1, 3- cyclohexadione reacts with phenyl Grignard reagent.更多还原