The reaction of 1,3-dibromocyclobutane (5) and of 1,3-dibromocyclopentane (6) with magnesium in diethyl ether has been investigated. The corresponding 1,3-di-Grignard reagents 7 (<9%) and 12 (〉〉45%), respectively, were obtained. Compound 12 decomposes to (2-cyclopentenyl)magnesium bromide (13) with a half-life of 5 h. The yields and stabilities of 7 and 12 are briefly discussed.
研究了1,3-二
溴环丁烷(5)和
1,3-二溴环戊烷(6)与
镁在
乙醚中的反应。分别获得了相应的1,3-二格里雅试剂7(<9%)和12(>>> 45%)。化合物12分解为(2-
环戊烯基)
溴化镁(13),半衰期为5小时。简要讨论了7和12的产量和稳定性。