Pt-Catalyzed Rearrangement of Oxaspirohexanes to 3-Methylenetetrahydrofurans: Scope and Mechanism
作者:Christian A. Malapit、Sampada M. Chitale、Meena S. Thakur、Rosa Taboada、Amy R. Howell
DOI:10.1021/acs.joc.5b00604
日期:2015.5.15
A novel Pt-catalyzed rearrangement of oxaspirohexanes to 3-methylenetetrahydrofurans is reported. Mechanistic studies by 13C-labeling experiments confirm oxidative addition of Pt(II) regioselectively to the least substituted carbon–carbon bond of the cyclopropane to form a platinacyclobutane intermediate. To our knowledge, this is the first alkoxy-substituted platinacyclobutane that has been observed
报道了新的Pt催化的氧杂螺正己烷重排成3-亚甲基四氢呋喃。通过13 C标记实验进行的机理研究证实,Pt(II)区域选择性地氧化添加到环丙烷的最少取代的碳-碳键上,从而形成铂环丁烷中间体。据我们所知,这是第一个在光谱上观察到的烷氧基取代的铂基环丁烷。描述了这种新的Pt催化转化的范围和提出的机理。