MANUFACTURE OF RIBOFLAVIN

Title:

MANUFACTURE OF RIBOFLAVIN

Document Type and Number:

Japanese Patent JPS60252456

Kind Code:

A

Abstract:

An improved process for the preparation of riboflavin by condensation of a 4,5-dimethyl-N-(D)-ribityl-2-phenylazoaniline derivative with barbituric acid in the presence of an acidic condensing agent in an organic solvent, wherein a 4,5-dimethyl-N-(D)-ribityl-2-(o-alkoxyphenylazo)-aniline of the formula IIa where R is alkyl of 1 to 4 carbon atoms, in particular methyl, is reacted with barbituric acid, as well as the novel intermediates of the formula IIa.

Inventors:

HANSU GEORUKU ERUNSUTO
HAINTSU ETSUKUHARUTO
YOAHIMU PAUSUTO

Application Number:

JP10164885A

Publication Date:

December 13, 1985

Filing Date:

May 15, 1985

Export Citation:

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Assignee:

BASF AG

International Classes:

C07C67/00; C07C241/00; C07C245/08; C07D475/14; (IPC1-7): C07C107/06; C07D475/14

Attorney, Agent or Firm:

Toshio Yano (2 outside)

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