The intramoleculae Diels-Alder reaction of cyclohexenone having an unsaturated ester side chain afforded tricyclo[4.3.1.0(3,7)]decanone in both a regio- and stereoselective manner under TMSCl-NEt(3)-ZnBr(2) conditions. Unexpectedly, the regiochemical control was against the conventional orbital requirement.
具有不饱和酯侧链的
环己烯酮的分子内Diels-Alder反应在TMSC1-NEt(3)-ZnBr(2)条件下以区域和立体选择性方式提供了
三环[4.3.1.0(3,7)]
癸酮。出乎意料的是,区域
化学控制违反了常规的轨道要求。