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Me 5 )Ru or (C 5 H 5 )Ru Are Robust to Molecular Oxygen. -Various ruthenium-catalyzed reactions such [2 + 2 +2] cycloadditions, C-allylations and decarboxylative insertions proceed in the presence of air with good results. In general, however, yields are somewhat lower than those obtained under inert conditions (to be continued). -(SEVERA, L.; VAVRA, J.; KOHOUTOVA, A.; CIZKOVA, M.; SALOVA, T.; HYVL, J.; SAMAN, D.; POHL, R.; ADRIAENSSENS, L.; TEPLY*, F.; Tetrahedron Lett. 50 (2009) 31, 4526-4528; Inst. Org. Chem. Biochem., Czech. Acad. Sci., CZ-166 10 Prague, Czech Republic; Eng.) -Mais 45-043

Bei der katalytischen Hydrierung der Pyridine (I) an Pd/BaSO4 in Äthanol bei ca. 25°C bilden sich Gemische der isomeren Dihydropyridine (II) und (III) in jeweils unterschiedlichem Mengenverhältnis.