A reaction of methyl (4R,5R)-4,5-epoxy-2(E)-hexenoate 1 with N-benzylmethylamine gave a diastereomerically pure methyl (4R,5R)-4,5-epoxy-(3S)-N-benzylmethylamino hexanoate 6 and methyl (4S,5R)-4-N-benzyl-methylamino-5-hydroxy-2(E)-hexenoate 7. The former was chemoenzymatically converted to (-)-osmundalactone 11, which is an aglycone of osmundalin. On the other hand, the directly conjugated addi...

A series of water-bridged dinickel complexes of the general formula [Ni2(μ2-OH2)(μ2-O2C(t)Bu)2(O2C(t)Bu)2(L)(L')] (L = HO2C(t)Bu, L' = HO2C(t)Bu (1), pyridine (2), 3-methylpyridine (4); L = L' = pyridine (3), 3-methylpyridine (5)) has been synthesized and structurally characterized by X-ray crystallography. The magnetic properties have been probed by magnetometry and EPR spectroscopy, and detai...

We report on the synthesis of tridentate-nitrogen pyrazole-pyridine-tetrazole (L(1)H) and pyrazole-pyridine-triazole (L(2)H) ligands and their complexation with lanthanides (Ln = Gd(iii), Eu(iii) and Tb(iii)) resulting in stable, charge-neutral complexes Ln(L(1))3 and Ln(L(2))3, respectively. X-ray crystallographic analysis of the complexes with L(1) ligands revealed tricapped trigonal coordina...

Dehydrogenation of Me(2)NH·BH(3) (1) by group 4 metallocene alkyne complexes of the type Cp(2)M(L)(η(2)-Me(3)SiC(2)SiMe(3)) [Cp = η(5)-cyclopentadienyl; M = Ti, no L (2Ti); M = Zr, L = pyridine (2Zr)] and group 4 metal amido complexes of the type M(NMe(2))(4) [M = Ti (8Ti), Zr (8Zr)] is presented.

Abstract New iron(II) coordination compounds with 2,6-bis(4,5-dimethyl-1 H -imidazol-2-yl)pyridine (L) and closo -borate(2–) anions [FeL 2 ]B 10 ⋅2H O 12 ⋅H have been synthesized. The identified studied by CHN analysis, electron spectroscopy (diffuse reflection spectroscopy), IR, Mössbauer, EXAFS spectroscopies, X-ray powder diffraction, static magnetic susceptibility. structures of the knots c...