Metal-Free Reductive Cleavage of C−O σ-bonds in Acyloin Derivatives by an Organic Neutral Super-Electron-Donor
作者:Sylvain P. Y. Cutulic、Neil J. Findlay、Sheng-Ze Zhou、Ewan J. T. Chrystal、John A. Murphy
DOI:10.1021/jo901815t
日期:2009.11.20
Neutral organic electron-donor 7, formally a pyridinylidene carbene dimer, effects reductive cleavage of C−O σ-bonds in acyloin derivatives Ar(CO)CRR′OX (X = OAc, OPiv, OBz, OMs) and this represents the first cleavage of C−O σ-bonds by a neutral organic electron-donor. The methodology is applicable to a large array of substrates and the reduced counterparts were isolated in good to excellent yields
中性有机电子给体7(通常为吡啶基亚苄基卡宾二聚体)实现酰氯衍生物Ar(CO)CRR'OX(X = OAc,OPiv,OBz,OMs)中CO键的还原裂解,这是首次裂解中性有机电子给体对C-Oσ键的影响。该方法学适用于大量的底物,并且还原的对应物以良好至极好的产率被分离出来。对于某些底物,供体7起碱的作用,与酰基辅酶的一些乙酸酯衍生物进行缩合反应,生成丁烯内酯。不同底物之间反应性的变化是合理的。