Synthesis of some new pyrimido[2′,1′:2,3]thiazolo[4,5-b]quinoxaline derivatives as anti-inflammatory and analgesic agents
作者:A.A. Abu-Hashem、M.A. Gouda、F.A. Badria
DOI:10.1016/j.ejmech.2010.01.042
日期:2010.5
6-aminothiouracil (1) with 2,3-dichloroquinoxaline (2) in ethanol/TEA afforded 6-amino-2-(3-chloroquinoxalin-2-ylthio)pyrimidin-4(3H)-one (3), which was refluxed in DMF to give 2-aminopyrimido[2′,1′:2,3]thiazolo[4,5-b]quinoxaline-4-one (4). Compound 4 was utilized as a key intermediate for the synthesis of a new pyrimido[2′,1′:2,3]thiazolo[4,5-b]quinoxaline derivatives 5–14 via the reaction with 2-chlorobenzaldehyde
6- aminothiouracil(处理1)与2,3-二氯喹(2在乙醇中)/ TEA,得到6-氨基-2-(3-氯喹喔啉-2-基硫代)嘧啶-4(3 H ^) -酮(3),将其在DMF中回流,得到2-氨基嘧啶基[2',1':2,3]噻唑并[4,5 - b ]喹喔啉-4-酮(4)。化合物4被用作一个新的嘧啶并合成的关键中间体[2',1':2,3]噻唑并[4,5- b ]喹喔啉衍生物5 - 14 经由与2-氯苯甲醛,2- chlorocyclohex反应-1-烯甲醛,2-氯苯甲酸,2,4-二氯苯甲酸,5-氯-3-甲基-1-苯基-1 H-吡唑-4-甲醛,2-氯-4,6-二甲基烟腈,α,β-不饱和酮和异烟醛。通过IR,NMR和质谱分析表征了新合成的化合物的化学结构。还对这些化合物的镇痛和抗炎活性进行了筛选。其中有些化合物(的3,4,9,10和12 - 14)显示出有希望的活性。