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General Information
Category: advanced materials
BSA 02-27: Catalysts for Hydrogenation and Hydrosilylation of Carbonyl Compounds
BNL Reference Number: BSA 02-27
Patent Status: U.S. Patent Number 6,737,531 was issued on May 18, 2004
Summary
Catalytic activity for hydrogenation of O═CEt2 (10−12 equiv) by [Cp(CO)2(PR3)M(η1-O═CEt2)]+ BAr4′- (30 mM) at 23 °C and <4 atm H2 in CD2Cl2
Homogeneous catalysts are usually more selective than heterogeneous catalysts, but they are often difficult to recycle. This organometallic complex containing molybdenum or tungsten and not containing a precious metal can be used to catalyze the hydrogenation and/or hydrosilylation of an organic compound. At the end of the reaction, the molybdenum or tungsten precipitates and can be recovered. Mild process conditions can be used to generate the catalyst, in line with the objectives of “green chemistry.”
Description
Heterogeneous catalysts or catalyst precursors for the hydrosilylation of ketones, aldehydes, and esters and for the hydrogenation of ketones and aldehydes are made from organometallic complexes of tungsten and molybdenum.
Benefits
These catalysts have a significantly higher lifetime and show increased thermal stability when compared to others in current use. In addition, they use organometallic Mo and W complexes that are considerably less expensive than the catalysts that use Pt.
Applications and Industries
The catalysts can be used in hydrogenation and hydrosilylation of carbonyl compounds in general.
Journal Publication
Have Questions?
For more information about this technology, contact Kimberley Elcess, (631) 344-4151.
