69767-96-0Relevant articles and documents
Specific intramolecular C-H...O interactions in 1-vinyl-2-formylimidazole and 1-vinyl-2-formylbenzimidazole studied by 1H and 13C NMR spectral data
Afonin,Baikalova,Domnina
, p. 1137 - 1141 (1996)
According to the 1H and 13C NMR spectral data, the vinyl group in 1-vinyl-2-formylimidazole and 1-vinyl-2-formylbenzimidazole is trans-oriented with respect to the formyl fragment, while the carbonyl group occupies the anti-position with respect to the N atom of pyridine cycle. A specific intramolecular C-H...O interaction of a weak hydrogen bond type is realized between the α-H atom of the vinyl group and O atom of the carbonyl group.
Enhanced hydrolytic activity of Cu(II) and Zn(II) complexes in highly cross-linked polymers
Schiller, Alexander,Scopelliti, Rosario,Severin, Kay
, p. 3858 - 3867 (2007/10/03)
The chelate ligand tris[(1-vinylimidazol-2-yl)methyl]amine (5) was synthesized in five steps from commercially available starting materials. Upon reaction with ZnCl2 or CuCl2 in the presence of NH 4PF6, the complexes [Zn(5)Cl]PF6 (6) and [Cu(5)Cl]PF6 (7) were obtained. The structure of both complexes was determined by single-crystal X-ray crystallography. Immobilization of 6 and 7 was achieved by co-polymerization with ethylene glycol dimethacrylate. The supported complexes P6-Zn and P7-Cu were found to be efficient catalysts for the hydrolysis of bis(p-nitrophenyl)phosphate (BNPP) at 50 °C. At pH 9.5, the heterogeneous catalyst P7-Cu was 56 times more active than the homogeneous catalyst 7. Partitioning effects, which increase the local concentration of BNPP in the polymer, are shown to contribute to the enhanced activity of the immobilized catalyst. The Royal Society of Chemistry 2006.
6-beta(substituted)-(S)-hydroxymethylpenicillanic acids and derivatives thereof
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, (2008/06/13)
Antibacterial penicillins of the formula STR1 or a pharmaceutically acceptable salt thereof wherein R1 is a heterocyclic group and R is hydrogen, the residue of certian carboxy protecting groups or the residue of an ester group readily hydrolyzable in vivo having activity against resistant organisms.