Abstract
Three novel series of core-functionalized dendrimeric phosphine ligands were synthesized and their rhodium complexes were studied as catalysts in both hydroformylation and hydrogenation of alkenes. Generally similar activities were obtained for the dendrimeric systems and the parent compounds except in the hydroformylation of a bulky substrate, 4,4,4-triphenylbut-1-ene, which gave a significant decrease in activity when the larger dendrimers were used. The rhodium complexes of the dppf-type dendrimeric ligands were studied in the hydrogenation of dimethyl itaconate in a continuous-flow membrane reactor showing a reasonable constant formation of the product compared to the non-dendrimeric catalyst.
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