Etude du comportement d'organometalliques (M = Zn, Mg, Li) vis a vis d'enynes conjuges
作者:D. Mesnard、L. Miginiac
DOI:10.1016/s0022-328x(00)87262-9
日期:1976.9
organometallic compounds such as allyl-zinc, -magnesium, -lithium and saturated lithium compounds are shown to readily undergo addition reactions with conjugated enynes: HCCC(R)C(R)(R), but the reactivity is reduced when the steric hindrance around the double bond is increased. With each organometallic compound used, this reaction is regioselective: 3,4 addition with organozinc compounds, 1,2 addition
活性有机金属化合物(例如烯丙基锌,-镁,-锂和饱和锂化合物)易于与共轭炔烃进行加成反应:HCCC(R)C(R)(R),但反应活性为当双键周围的位阻增加时,位阻降低。对于使用的每种有机金属化合物,该反应是区域选择性的:与有机锌化合物进行3,4加成,与有机锂化合物(烯丙基,丁基)进行1,2加成,并与有机镁化合物进行1,2和1,4加成。