Cyclic phosphonites
US4952740A · kind A · utility
44Cited by
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14Claims
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Assignee
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Key dates
| Filing date | Sep 12, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Sep 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/657181
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New cyclic phosphonites, in which one of the oxygen atoms of the ring can be replaced by an atom of sulphur or nitrogen; the molecule has an asymmetry due to at least two carbon atoms, one or more nitrogen and/or oxygen atoms or several of these elements together. Preparation of these phosphonites by the reaction of a dihalogeno-phosphine with a compound having two active H atoms, in the presence of a hydracid acceptor. Application of the new phosphonites to the production of the corresponding phosphinates and phosphine oxides.
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