An efficient method for the synthesis of various substituted 4-methoxy-1H-quinolin-2-ones from various substituted aniline with malonic acid, phosphorous oxychloride, sodium methoxide and glacial acetic acid under different conditions is described. The title compounds were synthesized from three steps; the first step involved the synthesis of substituted 2, 4-dichloro quinoline from aniline (substituted), with malonic acid and phosphorous-oxychloride. In the second step, the substituted 2, 4 dichloro compounds was heated with freshly prepared methanolic sodium methoxide solution to give 2, 4-dimethoxy quinoline compounds, it was then refluxed with glacial acetic acid and hydrochloric acid to give the titled compounds in the final step. The purity of the synthesized compounds was confirmed by their C, H and N analysis and the structure was analyzed on the basics of Mass, FT-IR and1H NMR.
一种高效的方法用于从各种取代苯胺与丙二酸、氯化亚磷、甲氧基钠和冰醋酸在不同条件下合成各种取代的4-甲氧基-1H-喹啉-2-酮。这些标题化合物经过三个步骤合成;第一步涉及从苯胺(取代的)与丙二酸和氯化亚磷合成取代的2,4-二氯喹啉。在第二步中,取代的2,4-二氯化合物与新鲜制备的甲醇钠甲醇溶液加热,得到2,4-二甲氧基喹啉化合物,然后与冰醋酸和盐酸回流,最终得到标题化合物。通过它们的C、H和N分析确认了合成化合物的纯度,并且通过质谱、傅立叶变换红外光谱和1H核磁共振对结构进行了分析。