Hydrogenation versus Hydrogenolysis with a Safe, Selective and Reusable Catalyst: Palladium Black on Teflon.

Abstract

Hydrogenation O 0220Hydrogenation versus Hydrogenolysis with a Safe, Selective and Reusable Catalyst: Palladium Black on Teflon. -The palladium-coated teflon magnetic stirring bar is used as a hydrogenation catalyst for a variety of substituted alkenes and alkynes affording saturated products in high yields. No deprotection occurs during the reaction. Disubstituted olefins with polar nucleophilic groups and substrates (XII) and (XIII) are unreactive. The catalyst can be reused for 4 times without any catalytic loss. No trace of palladium is found in the hydrogenation solutions. -(BELOTTI, D.; CANTAGREL*, G.; COMBELLAS, C.; COSSY, J.; KANOUFI, F.; NUNIGE, S.; New J. Chem. 29 (2005) 6, 761-764; Lab. Chim. Org., CNRS, Ec. Super. Phys. Chim. Ind., F-75231 Paris, Fr.; Eng.) -Y. Steudel 44-058