Polymer-supported metallic catalysts have lots of advantages such as higher catalytic activity

stereoselectivity

better stability

reusability and easier to handle

compared with homogeneous catalysts. After the completion of the reaction

the catalyst could separate from the reaction mixture and the catalyst could be recovered and reused by simple filtration for the next run. The cost and pollution could be reduced efficiently to some extent. The application of polymer supported precious metallic reagents in organic synthesis in recent five years are reviewed

the review has been divided into Ruthenium

Palladium

Silver and Gold according to the metal used and further sub-divided according to their application in organic reactions. This report is limited to the use of non-soluble polymeric supports

organometallics attached to silica

soluble polymers and dendrimers are excluded

although many interesting new supported catalysts have appeared using such materials also. Palladium-containing catalysts are introduced particularly because of their extensive use

we also ignored the Rhodium-containing catalysts due to the insufficient of literature.