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The ytterbium catalyst immobilized on the cross-linked poly(4-vinylpyridine/styrene) copolymer (P/S-Yb) was applied in the Mannich-type, three component one-pot synthesis of β-aminoketones. This catalytic system showed excellent catalytic activity and selectivity which resulted in the exclusive formation of β-aminoketone. The applicability of this immobilized catalyst system was shown by the reusability test and again highlighted by the synthesis of a β-aminoketone library using a broad range of substrates.doi:10.5012/bkcs.2009.30.3.551 fatcat:4yaqpolzlbaopa6qvs7fi46kcy