Stereoselective Ring Expansion of Vinyl Oxiranes: Mechanistic Insights and Natural Product Total Synthesis
作者:Matthew Brichacek、Lindsay A. Batory、Jon T. Njardarson
DOI:10.1002/anie.200906830
日期:2010.2.22
applicable, catalytic, and stereoselective vinyl oxirane ring expansion is described (see scheme; hfacac=hexafluoroacetylacetonate). The stereoselectivity was influenced by several reaction parameters, and kinetic studies support a mechanistic proposal involving the in situ formation of a more reactive catalytic species. This ring‐expansion reaction has been employed in the asymmetric total synthesis
真是(紧张)的解脱!描述了第一个广泛适用的,催化的和立体选择性的乙烯基环氧乙烷环扩环(参见方案; hfacac =六氟乙酰丙酮酸酯)。立体选择性受几个反应参数的影响,动力学研究支持了一种机制性的提议,涉及原位形成更具反应性的催化物质。该扩环反应已用于(+)-邻苯二酚二醇的不对称全合成中。