Synthesis of 5-amino-4(3H)-pyrimidinones. II. Synthesis of 5-acyl- and 5-alkylamino-3-phenyl-6-methyl-4(3H)-pyrimidinones and determination of their analgesic and antiinflammatory activities.
作者:TAISEI UEDA、JINSAKU SAKAKIBARA、JOZI NAKAGAMI
DOI:10.1248/cpb.31.4263
日期:——
N-Acylation and N-alkylation of 5-amino-6-methyl-3-phenyl-4 (3H)-pyrimidinone (I) were carried out and the products were examined for analgesic and antiinflammatory activities. The reaction of I with α-bromopropionyl bromide or chloroacetyl chloride followed by treatment with 40% aqueous dimethylamine gave 5-(α-dimethylaminopropionamido)- or 5-(N, N-dimethylglycyl) amino-6-methyl-3-phenyl-4 (3H)-pyrimidinone (IIc or IIe). The reaction of 3, 4-dihydro-1, 6-dimethyl-5-dimethylamino-4-oxo-3-phenylpyrimidinium iodide (IV) with several alkylamines such as propylamine, isobutylamine, sec-butylamine, and allylamine in acetonitrile gave 5-alkylamino-3, 4-dihydro-1, 6-dimethyl-4-oxo-3-phenylpyrimidinium iodides (IVa-d), whose reduction with sodium borohydride in methanol gave 5-alkylamino-1, 2-dihydro-1, 6-dimethyl-3-phenyl-4 (3H)-pyrimidinones (VIIa-d). The reaction of I with benzaldehyde or p-methoxybenzaldehyde gave 5-benzylidene (or p-methoxybenzylidene) amino-6-methyl-3-phenyl-4 (3H)-pyrimidinones (VIIIa, b). Compounds I and VIIIa showed analgesic and antiinflammatory activities in mice and rats.
对5-氨基-6-甲基-3-苯基-4(3H)-嘧啶酮(I)进行N-酰化和N-烷基化,并检测产物的镇痛和抗炎活性。 I与α-溴丙酰溴或氯乙酰氯反应,然后用40%二甲胺水溶液处理,得到5-(α-二甲基氨基丙酰胺基)-或5-(N,N-二甲基甘氨酰)氨基-6-甲基-3-苯基-4 (3H)-嘧啶酮(IIc 或 IIe)。 3, 4-二氢-1, 6-二甲基-5-二甲基氨基-4-氧代-3-苯基吡啶鎓碘化物 (IV) 与几种烷基胺如丙胺、异丁胺、仲丁胺和烯丙胺在乙腈中反应,得到 5-烷基氨基-3, 4-二氢-1, 6-二甲基-4-氧代-3-苯基吡啶鎓碘化物 (IVa-d),用硼氢化钠在甲醇中还原,得到 5-烷基氨基-1, 2-二氢-1, 6-二甲基-3-苯基-4(3H)-嘧啶酮(VIIa-d)。 I与苯甲醛或对甲氧基苯甲醛的反应得到5-苯亚甲基(或对甲氧基苯亚甲基)氨基-6-甲基-3-苯基-4(3H)-嘧啶酮(VIIIa,b)。化合物 I 和 VIIIa 在小鼠和大鼠中显示出镇痛和抗炎活性。