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Application filed by Institutul De Cercetari Chimico-FarmaceuticefiledCriticalInstitutul De Cercetari Chimico-Farmaceutice
Priority to RO105100ApriorityCriticalpatent/RO83188B1/ro
Publication of RO83188A2publicationCriticalpatent/RO83188A2/ro
Publication of RO83188B1publicationCriticalpatent/RO83188B1/ro
Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur
(AREA)
Abstract
Prezenta inventie se refera la un procedeu de obtinere a xentonei din acid o-clorbenzoic si fenol si anume reactia de condensare a acidului 0-clorbenzoic cu fenol are loc în prezenta hidroxidului de potasiu la temperaturi de 140.....150 degree C, dupa carese realizeaza extractia acidului o-fenoxibenzoic cu benzen diclormetan cloroform sau clorbenzen iar ciclizarea are loc cu acid sulfuric concentrat în acesti solventi fara izolarea si purificarea acidului o-fenoxibenzoic obtinut ca intermediar.
RO105100A1981-08-141981-08-14Procedeu de obtinere a xantonei
RO83188B1
(ro)