Process for production of ioversol
US4997983A · kind A · utility
6Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1990 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Jan 31, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of N,N'-bis(2,3-dihydroxypropyl)-5-N-(2-hydroxyethyl)glycolamido-2,4,6-triiod oisopht alamide wherein a mixture of 1,1,2-trichloroethane and 5-[(N-(2-acetoxyethyl)acetoxyacetamido]N,N'-bis(2,3-diacetoxypropyl)-2,4,6 -triiodoisophthalamide (hexaacetate) is distilled to remove 1,1,2-trichloroethane, at least a part of which is distilled as an azeotrope with water, so that a solvent exchange is effected to produce a mixture of hexaacetate in water. Hydrolysis of hexaacetate produces the desired product.
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