Robert Salchner

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B12 antivitamins are important and robust tools for investigating the biological roles of vitamin B12 . Here, the potential antivitamin B12 2,4-difluorophenylethynylcobalamin (F2PhEtyCbl) was prepared, and its 3D structure was studied in solution and in the crystal. Chemically inert F2PhEtyCbl resisted thermolysis of its Co-C bond at 100 °C, was stable in(More)
Don't take this antivitamin! 2-Phenylethynylcobalamin was prepared in a newly developed radical reaction using cob(II)alamin and 1-iodo-2-phenylethyne. It has an exceptionally short organometallic bond and is a remarkably light-stable and heat-resistant organometallic cobalamin. It is bound well by two important proteins of the human B12 transport system(More)
The crystal structures of three salts of anionic 5-aminotetrazole are described. The tetramethylammonium salt (P[Formula: see text]) forms hydrogen-bonded ribbons of anions which accept weak C-H⋯N contacts from the cations. The cystamine salt (C2/c) shows wave-shaped ribbons of anions linked by hydrogen bonds to screw-shaped dications. The(More)
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