作者:Vladislav Yu. Shuvalov、Sergei А. Chernenko、Anton L. Shatsauskas、Anna L. Samsonenko、Maksim V. Dmitriev、Alexander S. Fisyuk
DOI:10.1007/s10593-021-02980-w
日期:2021.8
The reaction of 4-arylidene-2-phenyloxazol-5(4H)-ones with enamines of ethyl acetoacetate gave 4-aryl-2-methyl-6-oxo-5-[(phenylcarbonyl)amino]-1,4,5,6-tetrahydropyridine-3-carboxylic acid esters, which, when heated with phosphorus oxychloride, were converted into esters of 7-aryl-5-methyl-2-phenyloxazolo[5,4-b]pyridine-6-carboxylic acids. Alkaline hydrolysis of these compounds gave 4-aryl-2-methyl
4-亚芳基-2-苯基恶唑-5(4 H )-酮与乙酰乙酸乙酯的烯胺反应得到4-芳基-2-甲基-6-氧代-5-[(苯基羰基)氨基]-1,4,5 ,6-四氢吡啶-3-羧酸酯,当与三氯氧磷一起加热时,转化为7-芳基-5-甲基-2-苯基恶唑并[5,4- b ]吡啶-6-羧酸的酯。这些化合物的碱性水解得到4-芳基-2-甲基-6-氧代-5-[(苯基羰基)氨基]-1,6-二氢吡啶-3-羧酸酯。