Mixed ligand catalyst for preparing aryl-substituted aliphatic c

Details Mixed ligand catalyst for preparing aryl-substituted aliphatic c Mixed ligand catalyst for preparing aryl-substituted aliphatic c

1994-01-27

1996-01-09

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

560105, C07C 5110

Patent

active

054825962

ABSTRACT:
A new process for preparing aryl substituted aliphatic carboxylic acids and their esters is provided. A 1-aryl substituted olefinic compound is reacted with carbon monoxide in the presence of water (in aqueous conditions) or an alcohol (in anhydrous conditions) at a temperature between about 25.degree. C. and about 200.degree. C. An excess of several moles of water or of anhydrous alcohol is preferred. An acid such as hydrochloric acid may also be added. As catalyst, a mixture of a palladium compound and optionally a copper compound with a ligand mixture comprising a compound of the formula (R').sub.3 ZY and a compound of the formula (R").sub.3 Z where each R' and R" are the same or different and is alkyl, aryl or substituted aryl, and Z is any atom that has a Pauling electronegativity of between 1.9 and 2.5 and Y is a member of Group VIA of the Periodic Table of Elements.

REFERENCES:
Samsel et al., J. Am. Chem. Soc., 107, 7606-7617 (1985).
Irie et al., Synlett, Apr. 1991, 265-266.

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