An efficient synthetic route to 3-aroyl-5-formyl-4-halo pyridin-2(1H)-ones has been developed via Vilsmeier cyclization of 2-(ethylthio(arylamino)methylene)-1-alkylbutane-1,3-dione.
已开发出一种高效的合成路线,通过对2-(乙硫(芳基氨基)亚甲基)-1-烷基丁酮-1,3-二酮进行Vilsmeier环化反应,制备3-芳酰基-5-甲醛基-4-卤代吡啶-2(1H)-酮。