Process for the preparation of 3,4-methylenedioxymandelic acid
AssigneeUbe Industries, Ltd.
InventorsKatsumasa Harada, Masashi Shirai, Koji Shiba
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Abstract
A process for preparing 3,4-methylenedioxymandelic acid by reacting 1,2-methylenedioxybenzene with glyoxylic acid in the presence of a strong acid and of at least one substance selected from the group consisting of an aprotic organic solvent and 100 to 1200 ml of an organic acid per kg of 1,2-methylenedioxybenzene.
Claims25
A process for preparing 3,4-methylenedioxymandelic acid comprising reacting 1,2-methylenedioxybenzene with glyoxylic acid in the presence of a strong acid and in the presence of at least one aprotic organic solvent selected from the group consisting of an ether, a ketone, a carboxylic acid ester, an amide, a urea and a carbonic acid ester.
Dependencies are inferred from the claim text.