Synthesis of 4-arylcarbamoyl-5-(2-hydroxynaphthylazo)imidazoles and 1-substituted naphtho[2,1-e]imidazo[5,1-c][1,2,4]triazines
作者:E. V. Sadchikova、V. S. Mokrushin
DOI:10.1007/s11172-006-0408-7
日期:2006.7
The reactions of β-naphthol with 5-diazoimidazoles and imidazolyl-5-diazonium salts containing chemically different carboxamide groups in position 4 were studied. Heterocyclization of 4-arylcarbamoyl-5-(2-hydroxynaphthylazo)imidazoles formed in these reactions was investigated. The presence of the NH fragment in the amide group prevents this process, the reaction giving instead 3-substituted 3,7-dihydroimidazo[4
研究了 β-萘酚与 5-重氮咪唑和咪唑基-5-重氮盐在 4 位含有化学上不同的羧酰胺基团的反应。研究了在这些反应中形成的 4-芳基氨基甲酰基-5-(2-羟基萘偶氮)咪唑的杂环化。酰胺基团中 NH 片段的存在阻止了这一过程,该反应产生了 3-取代的 3,7-二氢咪唑并[4,5-d][1,2,3]triazin-4-ones,这是由于C-偶氮偶联的可逆性。开发了萘并[2,1-e]咪唑并[5,1-c][1,2,4]三嗪体系中1-乙氧基羰基的改性方法,并用于制备其他途径无法获得的取代甲酰胺。