Website: https://oct.bme.hu/oct/hu/keglevich Keywords: ring enlargement of five-membered P-heterocycles; bridged P-heterocycles, precursors of low-coordinated fragments; aromatic phospholes; Diels-Alder reactions; low-coordinated P-fragments; phosphine-transition metal complexes; phosphine-boranes; azacrown ethers with phosphonoalkyl side-chains; ionic liquids; development of new catalysts and monitoring reactions by in situ methods; synthesis of pharmaceutical intermediates and products