Preparation of tri-iodo benzene compounds

Details Preparation of tri-iodo benzene compounds Preparation of tri-iodo benzene compounds

1999-11-09

2000-10-24

Siegel, Alan

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

Organic compounds

Amino nitrogen containing

564163, 570206, C07C23300, C07C 2200

Patent

active

061370061

ABSTRACT:
The invention provides a process by which ultra low salt content triiodinated aromatic compounds may be isolated from a highly acidic hot triiodination raction medium in a straightforward fashion. The process involves increasing the pH to above 5 with sodium hydroxide, addition of sodium bisulphite and/or sodium dithionite, addition of seed crystals, cooling slowly, and washing the collected precipitate with water.

REFERENCES:
Haavaldsen J. et al., "X-Ray Contrast Agents. I. Synthesis of Some Deriviatives of 5-Amino-2, 4, 6-Triiodoisophthlamide", ACTA Pharmaceutica Suecica, 20:3, 1983, XP002052827.

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