Process for the preparation of 5-amino-2,4,6-Triiodoisophthalic

Details Process for the preparation of 5-amino-2,4,6-Triiodoisophthalic Process for the preparation of 5-amino-2,4,6-Triiodoisophthalic

1996-05-17

1997-09-02

Killos, Paul J.

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

Organic compounds

Carboxylic halides

C07C 6300

Patent

active

056634323

ABSTRACT:
A process for the preparation of 5-amino-2,4,6-triiodoisophthalic acid dichloride by chlorination of 5-amino-2,4,6-triiodoisophthalic acid with thionyl chloride in the presence of a suitable solvent characterized in that the reaction is carried out in the presence of catalytic amounts of a tetraalkylammonium salt of formula

REFERENCES:
patent: 3655752 (1972-04-01), Ackerman et al.
patent: 4250113 (1981-02-01), Nordal et al.
Kenneth A. Burdett, "An Improved Acid Chloride Preparation Via Phase Transfer Catalysis", Syntheses, pp. 441-442, Jun. 1991.

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