Further studies on the reaction of ethyl benzoylacetate with malononitrile: synthesis of some novel pyridine and pyridazine derivatives
作者:Fathy M Abdelrazek、Abdellatif M Salah El-Din、Ahmed E Mekky
DOI:10.1016/s0040-4020(01)00613-5
日期:2001.7
dynamically controlled product, which undergoes cyclization in acid medium to afford 2,6-dihydroxy-4-phenylnicotinonitrile. Some azo derivatives of nicotinonitriles and of 2-aminopyran are described. 5-Arylazo-2-aminopyrans are transformed by acid treatment into pyridazine derivatives, whereas without the arylazo substituent pyridines are obtained.
对2-氰基-5-苯基-3,5-二氧戊腈进行醇解,然后进行Knoevenagel缩合,得到4,4-二氰基-3-苯基-3-丁烯酸乙酯,一种动态动态控制的产物,在酸性介质中进行环化,得到2,6-二羟基-4-苯基烟腈。描述了烟腈和2-氨基吡喃的一些偶氮衍生物。通过酸处理将5-芳基偶氮-2-氨基吡喃转化成哒嗪衍生物,而没有芳基偶氮取代基,得到吡啶。