Reactions of Coordinated cyclic polyolefins. The synthesis and cycloaddition reactions of tricarbonyl[(1,2,3,4-η)-3,7,7-trimethylcycloheptatriene]iron
作者:Zeev Goldschmidt、Shlomo Antebi
DOI:10.1016/0022-328x(83)85162-6
日期:1983.12
regiospecificity of the reactions is considered in terms of frontier molecular orbitals. Complex III reacts with tetracyanoethylene to form a mixture of 1,3- and 1,6-cycloadducts in 4/1 ratio. Diphenylketene (DPK) forms a 2 + 2 adduct with III at room temperature. At 80°C an acylated addition product is obtained. In general, steric hindrance increases the yield of products formed via bipolar reactions at the expense
据报道,通过两个独立的途径合成了三羰基[(1-4-η)-3,7,7-三甲基环庚三烯]铁(III)。根据前沿分子轨道来考虑反应的区域特异性。配合物III与四氰基乙烯反应,以4/1的比例形成1,3-和1,6-环加合物的混合物。在室温下,二苯乙烯酮(DPK)与III形成2 + 2加合物。在80℃下获得酰化的加成产物。通常,位阻增加了通过双极反应形成的产物的产率,但以通过协同途径形成的产物为代价。