Process for the production of nuclear substituted cinnamoylanthr

Details Process for the production of nuclear substituted cinnamoylanthr Process for the production of nuclear substituted cinnamoylanthr

1984-09-25

1986-05-06

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562453, 26050111, 544107, 546192, 548400, 548579, 514567, 514555, C07C 9900

Patent

active

045873569

ABSTRACT:
The present invention provides an improved method for producing a nuclear substituted cinnamoylanthranilic acid compound.
Illustrative of the process is the reaction of 3-hydroxy-4-methoxybenzaldehyde with 2-carboxymalonanilic acid in an inert solvent medium in the presence of a molar excess of piperidine to provide a high purity intermediate salt precipitate, and the salt is treated with an acidic reagent to yeild N-(3-hydroxy-4-methoxycinnamoyl)anthranilic acid product.

REFERENCES:
patent: 4026896 (1977-05-01), Harita et al.
patent: 4070484 (1978-01-01), Harita et al.
patent: 4337270 (1982-06-01), Noda et al.
patent: 4455295 (1984-06-01), Hopp et al.

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