A supported tetra(4-pyridyl)porphyrinato manganese(Ill) was prepared very easily in one step by a quaternerization reaction and is found to be an efficient catalyst for alkene epoxidation and alkane hydroxylation by sodium periodate. This catalyst showed high selectivity in epoxidation of stilbenes and R-(+)-limonene and exhibits a particular ability to epoxidize linear alkenes. Very inert saturated hydrocarbons as well as alkylbenzene derivatives can be oxidized in the presence of this supported catalyst. The new heterogenized metalloporphyrin catalyst is of high stability and reusability. (C) 2004 Elsevier B.V. All rights reserved.