苯甲酰乙酸乙酯与丙二腈进行克莱森缩合反应,得到2-氰基-5-苯基-3,5-二氧杂戊腈,可以将其环化成2-氨基吡喃,并与重氮盐偶联,得到偶氮衍生物。这些偶氮衍生物和苯甲酰乙酸乙酯的那些可以分别环化成4-氧代,6-氧代和6-亚氨基哒嗪和哒嗪并[2,3- a ]喹唑啉。可以将6-亚氨基哒嗪转化为6-氧代哒嗪。亚氨基和氧并哒嗪可转化为吡咯衍生物。
The reaction of ethyl benzoylacetate with malononitrile: a novel synthesis of some pyridazine, pyridazino[2,3- a ]quinazoline and pyrrole derivatives
作者:Fathy M Abdelrazek、Abdellatif M Salah El-Din、Ahmed E Mekky
DOI:10.1016/s0040-4020(00)01153-4
日期:2001.2
and coupled with diazonium salts to afford azo derivatives. These azo derivatives and those of ethyl benzoylacetate could be cyclized into 4-oxo-, 6-oxo- and 6-iminopyridazines and pyridazino[2,3-a]quinazolines, respectively. The 6-iminopyridazines could be transformed into the 6-oxopyridazines. The imino- and oxopyridazines could be transformed into pyrrole derivatives.
苯甲酰乙酸乙酯与丙二腈进行克莱森缩合反应,得到2-氰基-5-苯基-3,5-二氧杂戊腈,可以将其环化成2-氨基吡喃,并与重氮盐偶联,得到偶氮衍生物。这些偶氮衍生物和苯甲酰乙酸乙酯的那些可以分别环化成4-氧代,6-氧代和6-亚氨基哒嗪和哒嗪并[2,3- a ]喹唑啉。可以将6-亚氨基哒嗪转化为6-氧代哒嗪。亚氨基和氧并哒嗪可转化为吡咯衍生物。
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 pyridazinederivatives, whereas without the arylazo substituent pyridines are obtained.