generation of 3-phenylcyclopropenes is described. Reaction of these compounds with a range of dienophiles and dipolarophiles led to the stereoselective formation of [4+2]- and [3+2]-cycloadducts, which were exclusively exo-3-phenyl-cis-1,2-disubstituted cyclopropanes. Efficient trapping of 1-lithio-3-phenylcyclopropene with different electrophiles is also discussed. Ab initio calculations suggest that
描述了一种方便且廉价的生成3-
苯基环
丙烯的方法。这些化合物与一系列亲
双烯体和亲双亲体的反应导致立体选择性地形成[4 + 2]-和[3 + 2]-环加合物,它们仅是外-3-
苯基顺式-1,2-二取代的
环丙烷。还讨论了用不同的亲电子试剂有效捕集1-
硫代-3-
苯基环
丙烯的方法。从头算计算表明,最低能量构象的3-
苯基环
丙烯具有垂直于环
丙烯π键的
苯环平面,但旋转势垒较低。