摘要 通过 1 H NMR 和红外光谱研究了苯基丙酮酸甲酯 (MPP) 及其对位取代衍生物的分子结构。光谱数据指出 MPP 在溶液和固态中均采用烯醇形式。进行 ab initio 计算是为了获得有关烯醇形式的构型和构象偏好的信息。计算表明,烯醇OH基团和酯CO基团之间的分子间和分子内氢键对构象异构体的稳定很重要。
Synthesis and Cyclization of 3-Aryl-2-(arylacetoxy)acrylates: A Three-Step Access to Pulvinones
作者:Reinhard Brückner、David Bernier、Frank Moser
DOI:10.1055/s-2007-983800
日期:2007.7
17A- D. Esterification with phenylacetic anhydride or (4-methoxyphenyl)acetic acid/ N, N′-dicyclohexylcarbodiimide stereoselectively furnished 2-(arylacetoxy)-3-(4-methoxyphenyl)acrylates and thioacrylates ( Z)- 18A- D. Treating the latter with potassium TERT-butoxide induced Dieckmann condensations, which led to isomerically pure pulvinones 1G, H in up to 88% yield.