反应详情

In Step 1, a halogenated silane, such as 3-chloropropyldimethylchlorosilane, is reacted with a Grinard reagent, such as vinyl magnesium chloride, to form 3-chloropropyldimethylvinylsilane. When 3-chloropropylmethyldichlorosilane or 3-chloropropyltrichlorosilane is used as the halogenated silane instead of 3-chloropropyldimethylchlorosilane, 3-chloropropylmethyldivinylsilane or 3-chloropropyltrivinylsilane is obtained, respectively. The reaction is generally carried out by dropwise adding the halogenated silane to a solution of vinyl magnesium chloride in THF. The reaction temperature may be in a range of from 20 to 75 degrees C. The reaction is exothermic. Therefore, if the temperature rises too high, the reaction mixture may be cooled. After the completion of the addition, the reaction mixture is stirred for further 30 minutes to 10 hours. Then, the salt is dissolved in diluted hydrochloric acid and the organic phase is recovered and purified to obtain an intermediate product.