Optically active phosphorous compounds
US5516944A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1994 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Sep 30, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65683
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is concerned with novel optically active phosphorus compounds of the general formula ##STR1## wherein R and R.sup.1 each independently signify hydroxy, a protected hydroxy group, lower alkyl or lower alkoxy and PA0 R.sup.2 to R.sup.5 each independently signify alkyl with 3 to 7 carbon atoms, cycloalkyl or aryl or R.sup.2 and R.sup.3 or R.sup.4 and R.sup.5 together with the phosphorus form a group of the formula ##STR2## wherein R2 and R3 are different when R4 and R5 are the same, and R4 and R5 are different when R2 and R3 are the same, the manufacture of such compounds, their use for enantioselective reactions, such as, e.g., asymmetric hydrogenations, enantioselective hydrogen displacements in prochiral allylic systems and the like, as well as complexes of the compounds of formula I with Group VIII metals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.