Synthesis of 4-substituted pyrido[2,3-d]pyrimidin-4(1H)-one as analgesic and anti-inflammatory agents
作者:Abdel-Rahman B.A. El-Gazzar、Hend N. Hafez
DOI:10.1016/j.bmcl.2009.05.044
日期:2009.7
4-Substituted-pyrido[2,3-d]pyrimidin-4(1H)-ones 4a–c were synthesized by oxidation of 4-substituted-dihydropyrido[2,3-d]pyrimidin-4(1H)-ones 3a–c which were in turn prepared from arylidenemalononitriles 1a–c and 6-aminothiouracil 2. The reactivity of compounds 4a–c towards some reagents such as formamide, carbon disulfide, urea, thiourea, formic and acetic acids were studied. All the synthesized compounds