Preparation of carboxylic acids and esters thereof

Details Preparation of carboxylic acids and esters thereof Preparation of carboxylic acids and esters thereof

1983-10-13

1986-09-30

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

2604109R, 260413, 560 1, 560105, 560121, 560123, 560124, 560174, 560177, 562400, 562496, 562504, 562505, 562506, 562577, 562606, C07C 6738, C07C 51353

Patent

active

046148167

ABSTRACT:
A carboxylic acid or an ester thereof having at least two carbon atoms more than formic acid is prepared by reacting at elevated temperature e.g. 100.degree. to 250.degree. C. formic acid or a formate ester with an olefin e.g. ethylene in the presence of, as catalyst, a Group VIII noble metal e.g. iridium, preferably promoted by iodide, to cause addition of the formic acid or ester to the olefin and form the a higher acid e.g. propionic acid or ester thereof.
A strong acid such as a sulphonic acid may be used as a copromoter. The catalyst is employed in solution.

REFERENCES:
patent: 2013338 (1935-09-01), Carpenter
patent: 3816489 (1974-06-01), Craddock
patent: 3849456 (1974-11-01), McMullen
patent: 4414409 (1983-11-01), Waller
Kolomnikov, Kinetics and Catalysis, 13, p. 227 (1972).
Kolomnikov, Tetrahedron Letters, 46, p. 4435 (1971).

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