Process for the synthesis of...

Details Process for the synthesis of... Process for the synthesis of...

2007-11-13

2007-11-13

Witherspoon, Sikarl A. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S411000, C562S434000

Reexamination Certificate

active

11804509

ABSTRACT:
The invention claimed herein provides a process to oxidize N-(5-alkoxy-2-methyl-4-nitrophenyl)acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.

REFERENCES:
patent: 6002008 (1999-12-01), Wissner et al.
patent: 7227037 (2007-06-01), Duncan et al.
patent: WO 01/68186 (2001-09-01), None
Ona, a., Chem. Ind. (London), 4, 130, 1982.
Lee, C. et al., Journal Org. Chem., 1989, 54, pp. 3744-3747.
Larock, R.,Comprehensive Organic Transformations, A Guide to Functional Group Preparations, VCH Publishers, New York, 1989, p. 823.

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