Process for the preparation of allyl quinone derivatives, and intermediates.

摘要

A process for the industrial preparation of the quinone derivative represented by the following general formula: <CHEM> which is a preparation intermediate for chroman derivatives useful as a blood suger lowering agent, and novel intermediates, are provided. A preparation process for preparing the above quinone derivative encompasses the following: (1) Oxidation of the corresponding hydroquinone derivative, and (2) Hydrolysis of the corresponding acyl hydroquinone derivative with a Claisen alkali, followed by the oxidation of resulting hydrolyzate.