作者:Nigam M. Mishra、Vsevolod A. Peshkov、Olga P. Pereshivko、Sachin G. Modha、Erik V. Van der Eycken
DOI:10.1016/j.tetlet.2012.06.080
日期:2012.8
3-alkylation of 3,5-dichloro-2(1H)-pyrazinones with various malonate esters is described. The method constitutes a simple example of a C–C bond forming process at the 3-position of the pyrazinone core allowing to attain 3-substituted pyrazinones in good to high yields. 3-Alkylation of 3,5-dichloro-2(1H)-pyrazinones with acetoacetic ester was accompanied by further retro-Claisen fragmentation.
描述了有效的碱促进的3,5-二氯-2(1 H)-吡嗪酮与各种丙二酸酯的3-烷基化。该方法构成了吡嗪酮核心3位上C–C键形成过程的简单示例,可实现以高产率或高产率获得3-取代的吡嗪酮。3,5-二氯-2(1 H)-吡嗪酮与乙酰乙酸酯的3-烷基化反应伴随着进一步的克莱森反裂解。