Cycloaddition behavior of unsymmetric cyclopentadienone. Peri- and regio-selectivities
作者:Tamaki Jikyo、Masashi Eto、Kazunobu Harano
DOI:10.1039/a804671i
日期:——
An asymmetrically substituted cyclopentadienone, 2-methoxycarbonyl-5-methyl-3,4-diphenylcyclopentadienone 1a, was synthesized and cycloadditions of compound 1a with various unsaturated compounds involving conjugated medium-ring polyenes were investigated. The cycloaddition behavior was analyzed by frontier molecular orbital (FMO) theory, indicating that the reactivity, stereo- and regio-selectivities observed are entirely consistent with the FMO predictions.
合成了一种不对称取代的环戊二烯酮,即 2-甲氧基羰基-5-甲基-3,4-二苯基环戊二烯酮 1a,并研究了化合物 1a 与涉及共轭中环多烯的各种不饱和化合物的环加成反应。通过前沿分子轨道(FMO)理论对环化行为进行了分析,结果表明所观察到的反应活性、立体选择性和区域选择性与 FMO 的预测完全一致。