Process for the manufacture of aromatic phosphonates
US4104270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Mar 15, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/4021
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the manufacture of aromatic phosphorus derivatives of the formula: EQU Ar.PO(OR).sub.2 (1) where R is an optionally substituted alkyl, alkenyl, aralkyl, cycloalkyl or aryl radical, and Ar is an aromatic radical linked to the phosphorus atom through a carbon atom of the aromatic radical which comprises contacting a phosphorous acid diester of the formula: EQU HO.P(OR).sub.2 (2) with an aromatic halide of the formula Ar--X in the presence of copper or a copper compound, the symbols R and Ar having the meanings stated above and X representing a halogen atom. The aromatic radical preferably contains an atom or group activating the halogen atom. The process provides an improved method for manufacture of the phosphonic acid diesters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.