Regioselective Synthesis of 6-Vinyl-3,6-dihydropyridine-2(1<i>H</i>)-ones through Simple Addition of a Vinylmagnesium “Ate” Complex to 2-Pyridones
作者:Jacek G. Sośnicki、Przemysław Dzitkowski、Łukasz Struk
DOI:10.1002/ejoc.201500605
日期:2015.8
vinyldimethylmagnesate (vinylMe2MgLi), is obtained by mixing vinylmagnesium chloride (1 equiv.) and MeLi (in diethoxymethane; 2 equiv.). The application of this new reagent in the completely regioselective synthesis of 6-vinyl-3,6-dihydro-1H-pyridin-2(1H)-ones by simple 1,6-additions to 2-pyridones is described. Examination of the scope and limitations of the addition revealed the influence on the efficiency of the
一种高度亲核的乙烯基化试剂,乙烯基二甲基镁酸锂(vinylMe2MgLi),是通过混合乙烯基氯化镁(1 当量)和 MeLi(在二乙氧基甲烷中;2 当量)获得的。描述了这种新试剂在 6-vinyl-3,6-dihydro-1H-pyridin-2(1H)-ones 的完全区域选择性合成中的应用,通过简单的 1,6-加成到 2-pyridones 进行了描述。对加成范围和限制的检查揭示了对氮原子和 2-吡啶酮环上的取代基的 6-乙烯基化反应效率的影响。