Selective removal of chlorine from chlorophthalic compounds
US4981999A · kind A · utility
3Cited by
2References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/377
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method of selectively removing chlorine atoms in the order of fifth position first, fourth position second, and third position third from a chlorophthalic compound having at least two ring chlorine atoms such as a chlorophthalic acid or a chlorophthalic anhydride. The chlorophthalic compound is reacted in solution with a hydrodechlorinating metal in the presence of a base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.