2-dihydronaphthalenes. Our data suggests that this transformation occurs via a gold-stabilized cyclopropyl carbinyl cation, which triggers either a [1,2] carboxylate shift or a less favorable [1,2] aryl shift. The relative rates of these migrations can be controlled by the identity of the ligand or by stabilizing the mesomeric cation.
少至2摩尔%的(XPhos)AuNTf 2催化多种邻
乙炔基取代的
苯乙烯转变为
1,2-二氢萘。我们的数据表明,这种转变是通过
金稳定的环丙基羧甲基阳离子发生的,它会触发[1,2]
羧酸酯移位或不太有利的[1,2]芳基移位。这些迁移的相对速率可以通过
配体的身份或通过稳定介晶阳离子来控制。