- Design of a Synthetic Foldamer that Modifies the Growth of Calcite Crystals
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An oligopyridine foldamer, whose structure is dictated by bifurcated hydrogen bonds, was designed to recognize the surface of calcite through three carboxylates, projected from one face of the molecule. At low concentrations of the trimer, elongated calcite crystals with angular, teeth-like growths, identified as {↑0l} faces, were exclusively formed. In the presence of a related monomer, only calcite rhombohedra are formed, indicating that it is the ordered array of carboxylates that causes the morphological changes, via a specific interaction between the foldamer and the newly expressed faces of the growing calcite crystals. Copyright
- Estroff, Lara A.,Incarvito, Christopher D.,Hamilton, Andrew D.
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- Synthesis and biological efficacy of novel piperazine analogues bearing quinoline and pyridine moieties
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A series of novel piperazine analogues bearing quinolin-8-yloxy-butan-1-ones/pyridin-2-yloxyethanones were synthesized by a simple and convenient approach based on various substituted piperazine incorporating quinoline and pyridine moieties. The analogues were evaluated for in vitro antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferrous ion radical scavenging activities and anti-inflammatory activity by inhibition of Vipera russelli venom (PLA2) and gastric K+/H+-ATPase activities. Most of the title compounds exhibited promising activity. Best antioxidant and PLA2-inhibiting activities were found for piperazine analogues with phenyl and nitro phenyl groups, whereas methoxy group on phenyl piperazine indicated selectivity for the H+/K+-ATPase.
- Al-Ghorbani,Rekha,Lakshmi Ranganatha,Prashanth,Veerabasappagowda,Khanum
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p. 554 - 561
(2015/10/12)
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- Phenylazole compounds, process for producing the same and drugs for hyperlipemia
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Phenylazole compounds represented by general formula (1) or pharmaceutically acceptable salts thereof and drugs for hyperlipemia which contain these compounds as the active ingredient, wherein A represents imidazolyl, pyrazolyl, etc.; B represents (1a) or (1b) (wherein R2and R3represent each hydrogen, C1-6alkyl, etc; and k is 0 or an integer of 1 to 15); Y represents O, S, a bond, etc.; and Z represents an optionally substituted and saturated or unsaturated heterocycle containing 1 to 4 N, O or S atoms. Among all, compounds wherein Z is substituted chroman-2-yl, 2,3-dihydrobenzofuran-2-yl, etc. have an effect of inhibiting the formation of lipid peroxides too.
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