Patent · US Active

Process for the preparation of urethanes

US9199924B2 · kind B2 · utility

0Cited by

7References

9Claims

0Family size

Assignee

Bayer Intellectual Property GmbH · DE

Inventors

Felix Gärtner · Marburg, DE
Andreas Jacob · Munich, DE
Jörg Sundermeyer · Marburg, DE
Stephan Klein · Mettmann, DE
Stefan Wershofen · Mönchengladbach, DE

Key dates

Filing date	Aug 9, 2011
Grant date	Dec 1, 2015
Priority date	—
Expiry date	Sep 29, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2531/847
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for producing urethanes or ureas or mixtures of urethanes and ureas by oxidative carbonylation of organic amines in the presence of carbon monoxide, oxygen and a catalyst, where the catalyst used is a transition metal complex containing the structural feature: [Mn+(O˜N˜O)2−](n−2)+(L)m(Z−)n−2 and the method is carried out under halogen-free reaction conditions. The invention further relates to transition metal complexes containing said structural feature and also to the use of such transition metal complexes as catalysts in the production of urethanes or ureas or mixtures of urethanes and ureas.

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