Photocatalyst-controlled and visible light-enabled selective oxidation of pyridinium salts
This study proposes two different methods of photocatalytic-controlled and visible light-induced selective oxidation of pyridiniums with air as the terminal oxidant. The key to these transformations is to choose the appropriate light source and photocatal
Bifunctional Oxo-Tethered Ruthenium Complex Catalyzed Asymmetric Transfer Hydrogenation of Aryl N-Heteroaryl Ketones
A facile asymmetric transfer hydrogenation of ortho-substituted aryl N-heteroaryl ketones and non-ortho-substituted N-oxide of aryl N-heteroaryl ketones using a readily available oxo-tethered ruthenium complex as a catalyst and sodium formate as a hydrogen source in an aqueous solution has been discovered. A variety of chiral aryl N-heteroaryl methanols were obtained with up to 99.9% ee.
Ruthenium-catalyzed enantioselective hydrogenation of aryl-pyridyl ketones
Various substituted aryl-pyridyl ketones were hydrogenated in the presence of Ru-XylSunPhos-Daipen bifunctional catalytic system with enantiomeric excesses up to 99.5%. Upon introduction of a readily removable ortho-bromo atom to the phenyl ring, enantiomerically enriched 4-chlorophenylpyridylmethanol was obtained by hydrogenation method with 97.3% ee, which provided an important chiral intermediate for some histamine H1 antagonists.
Novel 2,5-benzodiazocines of formulas II and IV, pharmaceutical compositions containing them, processes for preparing them and methods of treating cardiac arrhythmias in mammals utilizing them. STR1
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(2008/06/13)
Amino acid derivatives
Compounds of the Formula I STR1 wherein R1 represents phenyl, or phenyl substituted by one, or more substituents selected from the group consisting of halogen, C1-7 -alkyl, and C1-7 -alkoxy, R2 represents furany
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(2008/06/13)
Anticonvulsant activity of substituted benzoylpyridines.
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Breen,Bojanowski,Cipolle,Dunn 3rd.,Frank,Gearien
p. 847 - 849
(2007/10/08)
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