第 38 卷第 6 期 | | Vol. 38 No. 6 | 2008 年 12 月 | Dec 2008 |
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所属栏目:功能材料
5-氨基-2-(4-氨基苯)苯并噁唑合成研究 |
姜佳一,庞立营
(大连化工研究设计院,辽宁 大连 116023) |
摘 要:以邻氨基对硝基苯酚和对硝基苯甲酰氯为原料进行酰胺化反应,再用多聚磷酸进行环化反应,得到中间体5-硝基-2-(4-硝基苯)苯并噁唑(NNB);中间体在77~80℃,压力为2.0~2.5 MPa,Raney-Ni作催化剂条件下高压催化加氢合成了5-氨基-2-(4-氨基苯)苯并噁唑,纯度为99.8%,总收率为81.1%。通过熔点、MS、元素分析对产品进行了结构表征。 |
关键词:聚合物;苯并噁唑;酰胺化;催化加氢 |
中图分类号:O622.6 文献标识码:A 文章编号:1009-9212(2008)06- 0052-03 |
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Syntheses of 5-Amino-2-(4-aminophenyl)benzoxazole |
JIANG Jia-yi,PANG Li-ying
(Dalian Research & Design Institute of Chemical Industry,Dalian 116023,China) |
Abstract:The intermediate 5-nitro-2-(4-nitrophenyl)benzoxazole(NNB)was synthesized from 2-amino-4-nitrophenol and 4-nitrobenzoyl chloride through amidation reaction and cyclization using polyphosphoric acid(PPA),and was hydrogenated to give the intermediate 5-amino-2-(4-aminophenyl)benzoxazole(ABO)at 77~80℃ under 2.0~2.5 MPa in the presence of catalyst Raney-Ni. The total yield of ABO was 81.10%,the purity was 99.75%.Structures of the target product was characterized with m.p. determination,MS and elementary analysis. |
Key words:polymer;benzoxazole;amidation reaction;catalytic hydrogenation |
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作者简介:姜佳一(1981-),女,辽宁锦州人,工程师,从事精细化学品的制备与应用研究(E-mail:dlchem@msn.com)。
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收稿日期:2008-12-08
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