Patent · US Expired

Optically active chiral diphosphine ligands

US6794525B2 · kind B2 · utility

1Cited by

0References

21Claims

0Family size

Assignee

PPG-SIPSY · FR

Inventors

Michel Bulliard · Angers, FR
Blandine Laboue · Ancenis, FR
Sonia Roussiasse · Écouflant, FR

Key dates

Filing date	Jan 31, 2003
Grant date	Sep 21, 2004
Priority date	—
Expiry date	Jan 31, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07B2200/07
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

An (R) or (S) chiral diphosphine of formula (I): wherein R and R1, which can be identical or different, represent an optionally saturated C1-10 alkyl group, an optionally saturated C3-9 cycloalkyl group, a C5-10 aryl group, the groups being optionally substituted by a halogen, a hydroxy, a C1-5 alkoxy, an amino, a sulfino, a sulonfyl, with R4 representing an alkyl, an alkoxy or an alkylcarbonyl, the alkyl, cycloalkyl, aryl groups optionally including one or more heteroatoms, or R and R1 together represent an optionally saturated C2-6 substituted alkyl group, an optionally saturated C3-9 cycloalkyl group, a C5-10 aryl group, the cycloalkyl or aryl groups being optionally substituted by a C1-5 alkyl, a halogen, a hydroxy, a C1-5 alkoxy, an amino, a sulfino, a sulonfyl, with R4 representing an alkyl, an alkoxy or an alkylcarbonyl, the alkyl, cycloalkyl, aryl groups optionally including one or more heteroatoms, R2 and R3, which can be identical or different, represent an optionally saturated C3-8 cycloalkyl group, a C6-10 aryl group, the groups being optionally substituted by a halogen, a hydroxy, a C1-5 alkoxy, an amino, a sulfino, a sulonfyl, with R4 representing an alkyl, an alkoxy …

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.