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
4-取代吡啶并[2,3- d ]嘧啶-4(1 ħ) -酮4A - Ç由4-取代的二氢吡啶并[2,3-的氧化合成d ]嘧啶-4(1 ħ) -酮3a - c依次由芳基丙二腈1a - c和6-氨基硫尿嘧啶2制备。研究了化合物4a – c对某些试剂(如甲酰胺,二硫化碳,尿素,硫脲,甲酸和乙酸)的反应性。通过光谱手段和元素分析对所有合成的化合物进行表征。化合物4c表现出64%和72%的镇痛活性。而且,化合物4b显示出50%和65%的抗炎活性。有趣的是,这些化合物显示出参比阿司匹林和双氯芬酸的溃疡指数的三分之一。