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Hydroformylation of Some Functionalized Olefins Catalyzed by Rhodium(I) Complexes with pydiphos and Its P-Oxide.-In contrast to the chiral optically active catalyst ligand (ppd), its P-oxide (popd) enhances reaction rate and chemoselectivity in hydroformylation of vinyl derivatives, e.g. (I). Enantioselectivity induced by both of the chiral ligands is extremely low (less than 1% in case of styrene (VIIIa)). In the hydroformylation of (I) with (ppd) and of (VIIIc) with (popd) ca. 10% e.e. are obtainable. In the case of diarylethenes (VIIIb) and (VIIIc) concomitant double bond hydrogenation is responsible for low yields of hydroformylation products. -(BASOLI, C.; BOTTEGHI, C.; CABRAS, M. A.; CHELUCCI, G.; MARCHETTI, M.; J.

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