Phosphinic acids and their sulfur derivatives and methods for their preparation
US8764880B2 · kind B2 · utility
1Cited by
8References
10Claims
0Family size
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Key dates
| Filing date | Jun 12, 2007 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Nov 22, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/5059
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides phosphinic acids and their sulfur derivatives, in accordance with the following formula (I): wherein R1 and R2 are different and each of R1 and R2 is independently selected from an organic radical that branches at the alpha carbon and an organic radical that branches at the beta carbon, and each of X and Y is independently O or S, and wherein said compound is a liquid at room temperature. Compounds of formula (I) find utility for example as metal extractants. Also provided are methods for making compounds of formula (I) and their corresponding phosphine intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.