Synthesis of the 1,2,4-Triazolo[4,3-<i>a</i>]quinazolin-5-ones and Related Compounds
作者:H. A. El-Sherief、A. E. Abdel-Rahman、G. M. El-Naggar、A. M. Mahmoud
DOI:10.1246/bcsj.56.1227
日期:1983.4
2-Hydrazino-3-phenyl-4(3H)-quinazolinone (1) underwent ring closure with aliphatic acid, aldehydes, and carbon disulfide to 1-alkyl-, 1-aryl-, and 1-mercapto-4-phenyl-1,2,4-triazolo[4,3-a]quinazolin-5(4H)-ones (7) for instance. The 1-alkylthio-3-phenyl-1,2,4-triazolo[4,3-a]quinazolin-5(4H)-ones were readily obtained from 7 and alkyl halides. Reaction of 1 with ethyl acetoacetate gave the corresponding
2-肼基-3-苯基-4(3H)-喹唑啉酮 (1) 与脂肪酸、醛和二硫化碳发生闭环,生成 1-烷基-、1-芳基-和 1-巯基-4-苯基-1例如,,2,4-三唑并[4,3-a]quinazolin-5(4H)-ones (7)。1-烷硫基-3-苯基-1,2,4-triazolo[4,3-a]quinazolin-5(4H)-ones 很容易从 7 和烷基卤化物中获得。1与乙酰乙酸乙酯反应得到相应的腙,其容易转化为2-(3-甲基-5-氧代-2-吡唑啉-1-基)-3-苯基-4(3H)-喹唑啉酮。