US 7,098,261 B2Granted

Polymer-supported phosphorus ligands for catalysis

AssigneeE. I. Du Pont de Nemours and Company

InventorsPaul J. Fagan, George Yanwu Li

Life of this patent

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Abstract

Novel phosphine and phosphine oxide ligands are prepared using polymeric supports. These compounds can be easily cleaved from the support, and along with the corresponding supported compounds, used as ligands in the preparation of novel, metal-complexed catalysts.

Claims3

Dependent claims

A process to prepare coumarin comprising contacting salicylaldehyde with an acrylate of the formula

wherein R10 is an alkyl group of 1–6 carbons.

Dependencies are inferred from the claim text.

Facts

Application: 10/187,706Filed 1 Jul 2002 · division
Priority: 13 Oct 1998
Published: US 2003/0104476 A15 Jun 2003
Granted: 29 Aug 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification30 codes

B01J 31/1658
Polymer immobilised coordination complexes, e.g. organometallic complexes: immobilised by covalent linkages, i.e. pendant complexes with optional…
B01J 31/1875
The ligands containing phosphorus: phosphinites
B01J 31/2409
Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring: with more…
B01J 31/2495
Phosphines , i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus…

Family

Application60/103,945Us provisional application · filed 13 Oct 1998
Application09/415,347Parent of this division · filed 8 Oct 1999
US 2003/0104476 A1Pre-grant publication · published 5 Jun 2003
US 7,098,261 B2This patent

From the US filing history. Foreign family members aren’t listed.

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