Flow catalysis by thin metals films in capillaries promoted by microwave irradiation

ORGN 196

Michael G. Organ, organ@yorku.ca1, Stacy Bremner, sbremner@yorku.ca2, Gjergji Shore, gjergji@yorku.ca2, and Sylvie Morin, smorin@yorku.ca2. (1) Department of Chemistry, Toronto Total Synthesis, 291 Northshore Boulevard West, Burlington, ON L7T1A6, Canada, (2) Department of Chemistry, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
A process has been developed for the deposition of Pd black onto the inner surface of micro-capillaries and these films have been examined by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) analysis to confirm their structure and elemental composition. These films have been shown to be highly catalytically active in metal-catalyzed transformations including the Suzuki-Miyama and Heck couplings where the reactions are flowed through these miniature capillaries while being microwaved where conversion times are in the order of seconds. Further, the role of metal films in transformations that are not specifically metal catalyzed (e.g., pericyclic reactions) has also been investigated. Here once again dramatic rate enhancements have been observed. Efforts have also been expended into differentiating ‘catalytic' effects from simple ‘heating' effects for the metal film.

 

New Reactions and Methodology
8:00 AM-12:00 PM, Monday, 27 March 2006 Georgia World Congress Center -- C301, Oral

Division of Organic Chemistry

The 231st ACS National Meeting, Atlanta, GA, March 26-30, 2006