Production of keto acids

Details Production of keto acids Production of keto acids

1998-01-09

1999-07-20

Burn, Brian M.

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

Organic compounds

Carboxylic acids and salts thereof

C07C22952

Patent

active

059257873

ABSTRACT:
A method for the production of a keto acid having the general formula ##STR1## wherein R1 and R2 independently represent a straight or branched chain alkyl of 1-18 carbon atoms, a cycloalkyl of 4-8 carbon atoms or a phenyl, each of which may be substituted by at least one substituent selected from the group consisting of halogen atoms and alkyls having 1-4 carbon atoms, an aralkyl of 7-10 carbon atoms, alkoxyalkyl having 2-20 carbon atoms, tetrahydrofuryl alkyl, alkylcarboxy alkyl, alkylcarboxy benzyl, or R1 and R2 together with the adjacent nitrogen atom may form a heterocyclic ring, or one of R.sub.1 and R.sub.2 is hydrogen, but R1 and R2 may not simultaneously be methyl or ethyl or benzyl which comprises reacting a m-amino phenol having the general formula ##STR2## wherein R1 and R2 are the same as above, with phthalic anhydride, in an organic solvent in an amount of less than 0.5 parts by weight per part of m-amino phenol.

REFERENCES:
patent: 5371285 (1994-12-01), Kondo et al.
Derwent Abstract 75-00537W.
Derwent Abstract 91-181444.
Derwent Abstract 91-122582.
Derwent Abstract 91-112648.
Derwent Abstract 91-358425.
Derwent Abstract 84-130440.
Derwent Abstract 86-221316.

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