作者:Luís M. T. Frija、Igor Reva、Amin Ismael、Daniela V. Coelho、Rui Fausto、M. Lurdes S. Cristiano
DOI:10.1039/c1ob05460k
日期:——
that the imidates rearrange exclusively through a [3,3′]-sigmatropic migration of the allylic system from O to N, with inversion. Mechanistic proposals are based on product analysis and extensive quantum chemical calculations at the DFT(B3LYP) and MP2 levels, on O-allyl and N-allyl isomers and on putative transition state structures for [1,3′]- and [3,3′]-sigmatropic migrations. The experimental observations
碳环烯丙基醇衍生的烯丙基四唑基醚的热异构化机理 环己-2-烯醇 和 3-甲基环己-2-烯醇并从天然萜烯醇神经醇中进行了研究。在三个1-芳基-5-烯丙氧基四唑的合成过程中,它们迅速异构化为相应的1-芳基-4-烯丙基四唑-5-酮。实验表明,酰亚胺化仅通过烯丙基系统从O到N的[3,3']-σ迁移进行重排,并具有反型。机理建议基于在O-烯丙基和N上DFT(B3LYP)和MP2级别的产物分析和广泛的量子化学计算-烯丙基异构体和[1,3']-和[3,3']-σ迁移的推定过渡态结构。只能基于有利于[3,3']-σ迁移的MP2 / 6-31G(d,p)计算来解释实验观察结果,从而为过渡态和最终异构化产物产生较低的能量。