Methods for preparing of 8-nitro- and 8-aminomackinazolinones were improved. 8-Acetyl(benzoyl)aminomackinazolinones reacted smoothly with aromatic aldehydes and furfurol in glacial acetic acid to give the corresponding 4-arylidene-substituted derivatives. Reaction of 8-aminomackinazolinone with aromatic aldehydes in glacial acetic acid was accompanied by acetylation of the amine and gave 8-acetylamino-4-arylidenemackinazolinones. Reaction of 8-aminomackinazolinone and p-nitrobenzaldehyde in propionic acid produced 8-[(4′ -nitrobenzylidene)amino]-4-(4″-nitrobenzylidene)mackinazolinone. In contrast, the reaction in Py occurred selectively at the amine to form the corresponding Schiff base 8-[(4′-nitrobenzylidene)amino]mackinazolinone.
8-硝基-和8-
氨基马
金纳唑啉酮的制备方法得到了改进。8-乙酰基(苯甲酰基)
氨基马
金纳唑啉酮在
冰乙酸中与芳香醛和
糠醛顺利反应,得到相应的4-芳基取代衍
生物。8-
氨基马
金纳唑啉酮在
冰乙酸中与芳香醛反应时,伴随着胺的乙酰化,得到8-乙酰
氨基-4-芳基马
金纳唑啉酮。8-
氨基马
金纳唑啉酮和
对硝基苯甲醛在
丙酸中反应,生成8-[(4′-硝基苄亚基)
氨基]-4-(4″-硝基苄亚基)马
金纳唑啉酮。相比之下,在
吡啶中的反应选择性地发生在胺上,形成相应的希夫碱8-[(4′-硝基苄亚基)
氨基]马
金纳唑啉酮。