The hydro-thermal reaction of CoCO(3) and 4-fluoro-benzoic acid afforded the title Co(II) complex, [Co(C(7)H(4)FO(2))(2)(H(2)O)(2)](n). The Co(II) atom is located on an inversion center and is coordinated by six O atoms from two water mol-ecules and four μ(2)-carboxyl-ate groups of 4-fluoro-benzoate anions, forming a distorted CoO(6) octa-hedron, with Co-O bond lengths in the range 2.071 (2)-2....

increased exposure to estrogen has been associated with the risk of breast cancer. substituted benzofuran derivatives with inhibitory effects on estrogen synthesis could be considered as a potential approach to reduce the risk of breast cancer. the study of cytotoxic effects of these compounds has suggested involvement of other mechanisms such as dna damage. in the current study we have investi...

UNLABELLED The (18)F-labeled aromatic amino acid 6-fluoro-3,4-dihydroxy-L-phenylalanine (6-(18)F-fluoro-L-DOPA) is widely used as a radiopharmaceutical in neurologic and oncologic PET. In this study, a novel approach to the preparation of carrier-added (CA) 6-(18)F-fluoro-L-DOPA in 3 radiosynthesis steps was developed and evaluated; in this approach, direct nucleophilic (18)F fluorination of a ...

les diagrammes debye - scherrer mettent tres nettement en evidence l'iso morphisme etroit qui existe entre les sulfates et les fluoroberillates • la consideration des structures-s-comparees de quelques sulfates et fluoro - .'i.ii_ berillates peut nous apporter une explication de ces deux phenomenes qui sont attri, buables aux liaisons hydrogene f ---- h - 0 plus fortes que celle des s...

The title compound, C(6)H(8)FN(3)O(2), an analog of histidine, shows a reduced side-chain pK(a) (ca 1). The title structure exhibits a shortening of the bond between the proximal ring N atom and the F-substituted ring C atom, indicating an increase in π-bond character due to an inductive effect of fluorine.

The title compound, C(8)H(7)FO(2), crystallizes as discrete mol-ecules, the conformation of which may be influenced by an intra-molecular hydr-oxy-carbonyl O-H⋯O hydrogen bond.

In the crystal structure of the title compound, C(22)H(19)FN(4), the quinoxaline system makes dihedral angles of 32.07 (13) and 69.64 (13)° with the 4-fluoro-phenyl and pyridine rings, respectively. The 4-fluoro-phenyl ring makes a dihedral angle of 71.77 (16)° with the pyridine ring. The crystal structure is stabilized by inter-molecular N-H⋯N hydrogen bonding.

In the crystal structure of the title compound, C(21)H(18)FN(5), the pyridopyrazine ring system forms dihedral angles of 33.27 (7) and 48.69 (9)° with the 4-fluoro-phenyl and pyridine ring, respectively. The dihedral angle of the 4-fluoro-phenyl and pyridine rings is 57.45 (8)°. The crystal packing is characterized by an inter-molecular N-H⋯N hydrogen bond.

[reaction: see text] Radical-mediated silyl- and germyldesulfonylations of various vinyl and (alpha-fluoro)vinyl sulfones with tris(trimethylsilyl)silane and germanium hydrides provide access to vinyl and (alpha-fluoro)vinyl silanes and germanes. Upon oxidative treatment with hydrogen peroxide in basic aqueous solution, the vinyl tris(trimethylsilyl)silanes and -germanes undergo Pd-catalyzed cr...

1-Fluoro-2,5-dimethoxy-4-nitrobenzene was synthesized in 90% yield by the reaction of commercial 2-fluoro-1,4-dimethoxybenzene with nitric acid. The structure was confirmed by X-ray crystallography. The new title compound was characterized by 1H and 13C-NMR, elemental analysis, EI-MS and FT-IR.