Autor:	Erich Tauer
Rok vydání:	2010
Předmět:	chemistry.chemical_classification chemistry.chemical_compound chemistry Polymer chemistry Imidazole Salt (chemistry) Ammonium General Medicine Ring (chemistry)
Zdroj:	ChemInform. 33
ISSN:	1522-2667 0931-7597
DOI:	10.1002/chin.200234142
Popis:	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.
Databáze:	OpenAIRE
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