第 37 卷第 5 期Vol. 37 No. 5
2007 年 10 月Oct 2007

所属栏目:医药及中间体

无催化剂条件下微波合成2-羟基苯并咪唑
常 慧1,宁满侠1,刘传生1,赵鸿斌1,2 (1. 东莞理工学院 化学生物工程系,广东 东莞 523808;2. 湘潭大学 化学学院,湖南 湘潭 411105)
摘 要:在无催化剂条件下,利用邻苯二胺与尿素的熔融缩合反应,微波辐射合成了2-羟基苯并咪唑,即苯并咪唑酮。合成无需溶剂和催化剂,反应速度快,操作简便、安全,过程节能、环保。对影响合成收率的条件因素进行了考察。结果表明:微波输出功率为638 W、间歇辐射时间9 min、n(邻苯二胺) ∶ n(尿素)=1 ∶ 1时,收率可达88.4%,产品经红外光谱确认。
关键词:微波辐射;2-羟基苯并咪唑(苯并咪唑酮);合成
中图分类号:O626.23  文献标识码:A  文章编号:1009-9212(2007)05- 0029-02
Synthesis of 2-Hydroxybenzimidazole under Microwave Irradiation without Catalysis
CHANG Hui1,NING Man-xia1,LIU Chuan-Sheng1,ZHAO Hong-bin1,2 (1.Faculty of Chemical Biotechnology,Dongguan University of Technology,Dongguan 523808,China;2.College of Chemistry,Xiangtan University,Xiangtan 411105,China)
Abstract:2-Hydrxybenzimidazole was synthesized via the condensation reaction of o-phenylenediamine and urea under microwave irradiation without catalysis condition. The methods had a characteristic of fast reaction,simple operation,safety,low energy consumptions and environmental protection. The optimum conditions were as follow:microwave power 638 W,microwave irradiation time 9 min,the mole ratio of o-phenylendiamin and urea 1∶1.1. Under the above conditions,the yield was 88.4%. The product was identified by IR.
Key words:microwave irradiation ;2-hydroxybenzimidazole(benzimidazolone );synthesis
作者简介:常 慧(1958-),女,辽宁铁岭人,副教授,从事有机合成及有机分析的研究工作。
收稿日期:2007-07-09