Synthesis of New Fused and Spiro Heterocyclic Systems from 3,5-Pyrazolidinediones
作者:M. A. Abdel-Rahman、A. Khodairy、A.-B. A. G. Ghattas、S. Younes
DOI:10.1002/jccs.200400017
日期:2004.2
were achieved on refluxing compounds 3, 4 4 or 6, in glacial acetic acid or diphenyl ether. 4,4-Dibromo-1-phenyl-3,5-pyrazolidinedione 12 reacted with the proper bidentates to give the corresponding spiro 3,5-pyrazolidinediones 13-15, respectively. The 4-aralkylidine derivatives 16 a - c , were subjected to Mannich reaction to give Mannich bases 17 a - c -22 a - c , respectively. 4-(p-Methylphenylam
4-溴-1-苯基-3,5-吡唑烷二酮2与不同的亲核试剂反应得到相应的4-取代衍生物3-8。环化的化合物 9-11 在回流的化合物 3、4、4 或 6 上,在冰醋酸或二苯醚中得到。4,4-二溴-1-苯基-3,5-吡唑烷二酮12与适当的二齿反应分别得到相应的螺环3,5-吡唑烷二酮13-15。4-芳烷基亚烷基衍生物16 a - c 进行曼尼希反应,分别得到曼尼希碱17 a - c -22 a - c 。制备了 4-(对甲基苯基氨基亚甲基)-1-苯基-3,5-吡唑烷二酮 23 或 4-(对甲基苯基偶氮)-1-苯基-3,5-吡唑烷二酮 29 并与活性腈、环酮和 N 反应, S-缩醛得到吡喃并[2,3-c]吡唑,吡唑并[4',3':5,6]吡喃并[2,3-c]吡唑,螺吡唑-4,