Bimetallic complexes and the use thereof in producing diaryl carbonate

Patent metadata

Field	Value
Publication number	US-8987446-B2
Application number	US-201013515710-A
Country	US
Kind code	B2
Filing date	Dec 9, 2010
Priority date	Dec 14, 2009
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

The invention relates to bimetallic complexes in which the ligand contains a salophen unit which complexes copper, manganese or cobalt and a phenanthroline unit which complexes palladium and the two systems are linked by a continuous conjugated system. The invention further relates to the use of these bimetallic complexes as catalysts for the oxidative carbonylation of aromatic hydroxy compounds to form diaryl carbonates, a process for preparing diaryl carbonates using the bimetallic complex as catalyst and also diaryl carbonates prepared by oxidative carbonylation of aromatic hydroxy compounds using the bimetallic complexes of the invention as catalysts.

First claim

The invention claimed is:

1. A compound of formula (3)

wherein
R is hydrogen, fluorine, chlorine, a nitro group, a C 1 -C 22 -alkyl radical, or a C 6 -C 22 -aryl radical;
Hal is selected from the group consisting of chloride, bromide, iodide, alkoxide, triflate, tosylate, mesylate, tetrafluoroborate, perchlorate, and hexafluorophosphate; and
M 1 is copper, manganese, or cobalt.

2. A process for preparing the compound of claim 1 comprising (1) hydrogenating the nitro groups of a compound of formula (4a) to form a compound of formula (4b);

(2) subsequently reacting the compound of formula (4b) with the phendione of formula (5)

to form a ligand of formula (6)

and (3) complexing the compound of formula (6) with a compound of formula (7)
PdHal 2 L 2   (7)

wherein
Hal is as defined above; and
L is a ligand which is optionally present.

Assignees

• Gürtler Christoph
• Müller Thomas Ernst
• Ooms Pieter
• Rechner Johann
• Risse Friedhelm
• Prokofieva Angelina
• Doro Franco
• Köhler Burkhard
• Leitner Walter
• Wolf Aurel
• Bayer Ip Gmbh

Inventors

• Gürtler Christoph
• Müller Thomas Ernst
• Ooms Pieter
• Rechner Johann
• Risse Friedhelm
• Prokofieva Angelina
• Doro Franco
• Köhler Burkhard
• Leitner Walter
• Wolf Aurel

Classifications

• C07C68/01

  from carbon monoxide and oxygen · CPC title

• C07F15/0066 Primary

  without a metal-carbon linkage · CPC title

• C07C69/96

  Esters of carbonic or haloformic acids · CPC title

• C07C68/005

  Chemistry & Metallurgy · mapped topic

• C07F15/00

  Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table · CPC title