PROCESS FOR PRODUCING 2,2-DIMETHYL-5-(2,5-DIMETHYLPHENOXY)- PENTANOIC ACID, INTERMEDIATE FOR ITS PRODUCTION AND PROCESS FOR PRODUCING SAID INTERMEDIATE

PROCESS FOR PRODUCING 2,2-DIMETHYL-5-(2,5-DIMETHYLPHENOXY)- PENTANOIC ACID, INTERMEDIATE FOR ITS PRODUCTION AND PROCESS FOR PRODUCING SAID INTERMEDIATE

The invention relates to an improved process for the preparation of 2,2-dimethyl-5-(2,5-dimethylphenoxy)-pentanoic acid of Formula (I) which comprises reacting an ester of the general Formula (X) (X) wherein X represents halogen and Z stands for a straight or branched chain C1-8 alkylene group optio...

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Hauptverfasser: GAABORU FUEHEERU, JIIOERUJII KURASUNAI, ANTARU SHIMAI, EEBUA KOBUAACHIYU NEEE BOZOO, JIIOERUJII BUERETSUKEI NEEE DONAATO, RAYOSU TORUDEI, KAARUMAAN NAJII, GAABORU KOBUAACHIYU, FUERENKU SEDERUKEENIYUI, ZORUTAAN ZUBOBUICHIYU, IMURE MORABUCHIITSUKU
Format: Patent
Sprache:eng
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
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Zusammenfassung:The invention relates to an improved process for the preparation of 2,2-dimethyl-5-(2,5-dimethylphenoxy)-pentanoic acid of Formula (I) which comprises reacting an ester of the general Formula (X) (X) wherein X represents halogen and Z stands for a straight or branched chain C1-8 alkylene group optionally substituted by one or two 2,2-dimethyl-5-halopentanoyloxy group(s), wherein halo represents chlorine or bromine, and in which alkylene group one or two methylene group(s) may be optionally replaced either by hetero atom(s) or by a bivalent heterocyclic group-with an alkali salt of 2,5-dimethylphenol of Formula (II) (II) or with an ester of the latter formed with a lower alkanoic acid, and hydrolizing the aryloxy-substituted ester of the general Formula (XI) thus obtained. (XI) Furthermore the invention relates to intermediate compounds of the general Formula (X), wherein X and Z are as stated above, and to a process for the preparation thereof.