Optically active diphosphine ligands

US5990320A · kind A · utility

Assignee

• BASF SE

Inventors

• Gunther Helmchen · Heidelberg, DE
• Christoph Murmann · Reinheim, DE

Key dates

• Filing date: Jun 16, 1998
• Grant date: Nov 23, 1999
• Expiry date: Jun 16, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/847
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Optically active diphosphine ligands of the formula I, ##STR1## where: R.sup.1 is hydrogen, C.sub.1 -C.sub.10 -acyl, C.sub.1 -C.sub.10 -alkyl, C.sub.2 -C.sub.10 -alkenyl, each of which may be linear or branched, aryl, arylalkyl, in which the ring systems may be substituted in each case, ##STR2## R.sup.2, R.sup.3 independently of one another are C.sub.1 -C.sub.10 -alkyl, which may be linear or branched, aryl, arylalkyl, in which the ring systems may be substituted in each case, PA1 R.sup.4, R.sup.5, R.sup.6 independently of one another are C.sub.1 -C.sub.10 -alkyl, which may be linear or branched, aryl, arylalkyl, in which the ring systems may be substituted in each case.