Preparation of aromatic and heteroaromatic carboxylic acids...

Details Preparation of aromatic and heteroaromatic carboxylic acids... Preparation of aromatic and heteroaromatic carboxylic acids...

2008-05-13

2008-05-13

O'Sullivan, Peter (Department: 1621)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S327000, C562S412000, C562S413000, C562S414000, C562S415000, C562S416000, C562S417000

Reexamination Certificate

active

07371866

ABSTRACT:
A process for catalytically oxidizing alkylaromatic compounds of the formula (I)in-line-formulae description="In-line Formulae" end="lead"?Ar—CH2—Rin-line-formulae description="In-line Formulae" end="tail"?where Ar is an optionally substituted, aromatic or heteroaromatic 5-membered or 6-membered ring or a ring system having up to 20 carbon atoms where Ar may optionally be fused to a C1-C6-alkyl group in which up to 2 carbon atoms may be replaced by a heteroatom, and R is hydrogen, phenyl, benzyl or heteroaryl, where the phenyl, benzyl or heteroaryl radicals may also be joined to Ar by a bridge, or R together with Ar forms an optionally substituted ring system which may contain one or more optionally substituted heteroatoms, to the corresponding aromatic or heteroaromatic carboxylic acids in a solvent with ozone in the presence of a transition metal catalyst and optionally in the presence of an acid at a temperature between −70° C. and 110° C. to the corresponding carboxylic acid.

REFERENCES:
patent: 3969405 (1976-07-01), d'Ostrowick et al.
patent: 11343283 (1999-12-01), None
N.F. Tyupalo, Chemical Abstracts Online, CA Accession No. 95: 24981; abstract of N.F. Tyupalo, Zhurnal Prikladnoi Khimii, 54(2), 450-2 (1981).
Hay et al., J. Org. Chem, 25, 616-617 (1960).

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