Back to results
US 6,043,396 AGranted
Preparation of optically active phospholanes, their metal complexes and use in asymmetric synthesis
AssigneeBASF SE
InventorsRainer Sturmer, Armin Borner, Jens Holz, Gudrun Voss
Life of this patent
Estimating the term…
Abstract
Phospholanes and diphospholanes of the formula I ##STR1## where: R.sup.1 and R.sup.2 are, independently of one another, C.sub.1 -C.sub.6 -alkyl, aryl, alkylaryl, R.sup.1 is also hydrogen, A is either R.sup.1 or ##STR2## B is a linker having 1-5 carbon atoms between the two phosphorus atoms, and their use as catalyst in asymmetric synthesis.
Claims10
A phospholane or diphospholane of the formula I ##STR22## where R.sup.1 is H, C.sub.1 -C.sub.6 -alkyl, aryl, or alkylaryl,
- R.sup.2 is C.sub.1 -C.sub.6 -Alkyl, aryl, or alkylaryl,
- A is either R.sup.1 or ##STR23## B is a linker having 1-5 carbon atoms between the two phosphorous atoms.
Dependencies are inferred from the claim text.