Preparation of New Cyclic Quaterbenzoxazole and -Imidazole Derivatives

Preparation of New Cyclic Quaterbenzoxazole and -Imidazole Derivatives
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新型环状季苯并恶唑及咪唑衍生物的制备

DOI:
10.1055/s-2002-25771
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
E. Tauer
E. Tauer
中科院分区:
--
文献类型:
--
作者:
E. Tauer

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分别通过3-氨基-2-羟基苯甲酰胺(4)和2,3-二氨基苯甲酸铵盐(7)与多磷酸环化合成了新的环状四苯并恶唑5和咪唑8。这两种化合物代表了一种新的杂环九环系统,它可以由四个相同(或不同)的苯并-x-唑以环状排列构成。
The new cyclic quaterbenzoxazole 5 and -imidazole 8 have been synthesized by cyclization of 3-amino-2-hydroxybenzamide (4) and the ammonium salt of 2,3-diaminobenzoic acid (7), respectively, with polyphosphoric acid. Bothcompounds represent a new heterocyclic nine ring system, which can be built up from four identical (or different) benzo-x-azoles in a cyclic arrangement.