Title:
METHOD FOR PREPARING KETONE COMPOUND
Document Type and Number:
Japanese Patent JP2005289949
Kind Code:
A
Abstract:
To provide a method for simply preparing a ketone compound in high yield at high purity.
In preparing a ketone compound such as 2-(10,11-dihydro-10-oxydibenzo[b,f]thiepin-2-yl)propionic acid by the Friedel-Crafts reaction type intramolecular cyclization of a dicarboxylic acid compound such as 5-(1-carboxyethyl)-2-phenylthiophenylacetic acid, a polyphosphoric acid which is prepared by mixing phosphoric acid with diphosphorus pentoxide and has a phosphoric acid concentration of 110-130 mass% and a viscosity at 25°C of 700-1,000 mPa s is used as a condensing agent.
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Inventors:
TANAKA KENJI
YAMAMOTO HIROMASA
YAMAMOTO HIROMASA
Application Number:
JP2004111746A
Publication Date:
October 20, 2005
Filing Date:
April 06, 2004
Export Citation:
Assignee:
TOKUYAMA CORP
International Classes:
C07D337/14; C07B61/00; C07C51/353; C07C59/86; (IPC1-7): C07D337/14
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