Synthetic applications and mechanistic studies of metal-catalyzed dehydrocoupling reactions of amine-borane adducts.
Published: 2006
Language: eng
Number of pages: 87
ISBN-13: 9780494163207
Description: The scope and selectivity of Rh(0)-catalyzed tandem dehydrocoupling-hydrogenation reactions have been investigated utilizing Me2NH&bull;BH3  as a stoichiometric H2 source. The influence of the presence of amine-borane adducts on the distinctive selectivity of hydrogenation of organic substrate is demonstrated. Previous studies in our group have shown that the catalytic dehydrocoupling of the amine-borane adduct Me2NH&bull;BH 3 using Rh(I) precatalyst such as using [Rh(1,5-cod)Cl]2 involves the formation of Rh(0) colloids during the lengthy induction period followed by a heterogeneous process (cod = cyclooctadiene). Recently another group, Autrey and co-workers, has studied the same reaction under slightly different experimental procedure and reported very different results (virtually no induction period, and homogeneous catalysis involving a Rh6  species). A preliminary investigation aims to explain these different observations. The results suggest that the presence of air in the reaction mixture may explain the results of Autrey and co-workers.
Notes: Source: Masters Abstracts International, Volume: 44-06, page: 2806.

Thesis (M.Sc.)--University of Toronto, 2006.

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