吡唑嘌呤席夫碱的合成  被引量:2

SYNTHESIS OF PYRAZOLE PURINE SCHIFF BASE

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作  者:温辉梁[1] 熊志强[1] 胡晓波[1] 丁靓[1] 易绣光[1] 刘崇波[2] 

机构地区:[1]南昌大学食品科学与技术国家重点实验室,江西南昌330047 [2]南昌航空大学环境与化学工程学院,江西南昌330063

出  处:《精细石油化工》2008年第4期7-10,共4页Speciality Petrochemicals

摘  要:以苯肼、盐酸氨基脲为起始物,经缩合、Vilsmeier-Haak 试剂(DMF/POCl_3)环化、再缩合消除合成了2种吡唑嘌呤席夫碱:1,2-二甲基-2-{2-{6-氯-2[(3-苯基-1H-吡唑-4基)亚甲氨基]-9H-嘌呤-9-基}乙基}丙二酸和二甲基-2-{2-{6-氯-2[(5-氯-3甲基-1-苯基-1H-吡唑-4基)亚甲氨基]-9H-嘌呤-9-基}乙基}丙二酸。其中吡唑酮环化反应的最佳反应条件为:反应温度70℃,反应时间5 h,收率在80%以上。目标产物总收率分别为79.7%和71.8%,通过熔点测定、红外光谱、核磁共振光谱对目标物化学结构进行了表征。Two kinds of pyrazole purine shiff base, (E)-dimethyl 2-(2-(6-chloro-2-((3-phenyl -1H- pyrazol-4-yl) methyleneamino) -9 H-purin-9-yl) ethyl) malonate and (E) -dimethyl 2- ( 2- ( 6-chloro-2- ( ( 5- chloro-3-methyl-1-phenyl-1H-pyrazol-4-yl) methyleneamino)-9 H-purin-9-yl) ethyl) malonate were synthesized for the first time by condensation, cyclization with Vilsmeier-Haak reagent, and then condensed elimination using phenyl hydrazine with semicarbazide hydrochloride as raw materials. The optimum cyclization reaction conditions of the pyrazolone are: reaction temperature 70 ℃ and reaction time 5 h. The yield of each step is much higher than 80 % , and the total yields for the first and second steps are 79. 7% and 71. 8%, respectively. In this article we provided a convenient and high yield method to synthesize the pyrazole purine shiff base. Through melting point test, IR and ^1H NMR, the structures and formula of the target compounds were characterized

关 键 词:吡唑醛 嘌呤 席夫碱 苯肼 盐酸氨基脲 缩合 

分 类 号:TQ226.35[化学工程—有机化工]

 

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