The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2005
Filed:
Mar. 19, 2002
Ralf Jackstell, Wittenberg, DE;
Holger Klein, Rockstock, DE;
Matthias Beller, Rostock, DE;
Klaus-diether Wiese, Haltern, DE;
Cornelia Borgmann, Recklinghausen, DE;
Ralf Jackstell, Wittenberg, DE;
Holger Klein, Rockstock, DE;
Matthias Beller, Rostock, DE;
Klaus-Diether Wiese, Haltern, DE;
Cornelia Borgmann, Recklinghausen, DE;
Oxeno Olefinchemie GmbH, Marl, DE;
Abstract
Diphosphine of formula IRRP—HC—Ar—CHPRR  (I)are prepared by a process that comprises a) reacting a dimethyl compound of formula IIHC—Ar—CH  (II)with a base and an N-substituted aminophosphorous halide to form bis(aminophosphinomethyl) compound of the formula IIIRRP—HC—Ar—CH—PRR  (III)b) reacting the compound of formula III with HCl to form bis(dichlorophosphinomethyl) compound of formula IVClP—HC—Ar—CH—PCl  (IV)and c) reacting the compound of formula IV with an organometallic reagent to give the product compound of formula I, wherein groups Rand Rare each, independently of one another, a substituted or unsubstituted aromatic, heteroaromatic or aliphatic hydrocarbon group and may have a covalent bond connecting them and Ar is a substituted or unsubstituted aromatic or heteroaromatic hydrocarbon group an Rand Rare each, independently of one another, an N-substituted alkylamino or arylamino group.