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:
--
通讯作者:
E. Tauer
中科院分区:
文献类型:
--
作者:
E. Tauer
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.