Nanopalladium catalyst

Scheme 2.17 Heck coupling of aryl chlorides with a nanopalladium catalyst.

Choudary, B.M., Madhi, S., Chowdari, N.S., Kantam, M.L. and Sreedhar, B., Layered double hydroxide supported nanopalladium catalyst for Heck-, Suzuki-, Sonogashira-, and Stille-type coupling reactions of chloroarenes, J. Am. Chem. Soc., 2002, 124, 14127-14136. 

Uozumi Y, Nakao R (2003) Catalytic oxidation of alcohols in water under atmospheric oxygen by use of an amphiphilic resin-dispersion of a nanopalladium catalyst. Angew Chem Int Ed 42(2) 194-197... 

A number of researchers have ttied to tackle catalyst removal/recovery/recycling issues by using systems in which the palladium has been embedded on a solid support. Perhaps the most encouraging example in terms of activation of aryl chlorides is Choudary s heterogeneous layered double hydroxide supported nanopalladium catalyst. This material promotes the coupling of aryl chlorides to phenylacetylene in yields ranging from 60 to 95%. 

Boronate Microparticle-Supported Nanogold and Nanopalladium Catalysts... 

Yamada YM, Uozumi Y (2006) A solid-phase self-organized catalyst of nanopalladium with main-chain viologen polymers a-alkylation of ketones with primary alcohols. Org Lett 8(7) 1375-1378 Yamada YM, Uozumi Y (2007) Development of a convoluted polymeric nanopalladium catalyst oi-alkylation of ketones and ring-opening alkylation of cyclic 1, 3-diketones with primary alcohols. Tetrahedron 63(35) 8492-8498... 

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