The substitution reaction of pyrazine-2,3-dicarbonitrile derivatives with ammonia, amines, water and alcohols
作者:Hideki Hirano、Rachel Lee、Masaru Tada
DOI:10.1002/jhet.5570190631
日期:1982.11
es 4 and 6 by the substitution reaction with amines but give only 3-aminopyrazine-2-carbonitrile derivative on the reaction with ammonia. The reaction of 5-arylpyrazine-2,3-dicarbonitriles (1 and 2) with alcohols in the presence of a base gives 2-alkoxypyrazine-3-carbonitrile derivatives 9 and 13 and 3-alkoxypyrazine-2-carbonitrile derivatives 10 and 14. The reaction of water gives two pyrazinonecarbonitrile
5-芳基吡嗪-2,3-二腈1和2得到2-氨基-5-芳基吡嗪-3-腈3和5和3- alkylamiono -5-芳基吡嗪-2-甲腈4和6通过与胺,但给所述取代反应只有3-氨基吡嗪-2-腈衍生物与氨反应。5-芳基吡嗪-2,3-二腈(1和2)与醇在碱的存在下反应,生成2-烷氧基吡嗪-3-腈衍生物9和13和3-烷氧基吡嗪-2-腈衍生物10和14。水的反应产生了两种吡嗪酮腈衍生物11和12。在这些反应中,吡嗪环上的芳基是3,4-二甲氧基苯基和苯并-15-冠-5。