Highly atom-economic, catalyst- and solvent-free oxidation of sulfides into sulfones using 30% aqueous H2O2
作者:Marjan Jereb
DOI:10.1039/c2gc36073j
日期:——
Highly atom-efficient oxidation of sulfides into sulfones under solvent- and catalyst-free reaction conditions using a 30% aqueous solution of H2O2 at 75 °C is reported. A structurally diverse set of phenyl alkyl-, phenyl benzyl-, benzyl alkyl-, dialkyl-, heteroaryl alkyl- and cyclic sulfides were transformed into sulfones regardless of the aggregate state and electronic nature of the substituents
Synthesis and Biological Activity of Nitro Heterocycles Analogous to Megazol, a Trypanocidal Lead
作者:Gérard Chauvière、Bernard Bouteille、Bertin Enanga、Cristina de Albuquerque、Simon L. Croft、Michel Dumas、Jacques Périé
DOI:10.1021/jm021030a
日期:2003.1.1
the two rings of the basic nucleus, replacement of the thiadiazole by an oxadiazole, replacement of the nitroimidazole part by a nitrofurane or a nitrothiophene, and substitutions on the exocyclic nitrogen atom for evaluation of an improved import by the glucose or the purine transporters. Assays of the series of compounds on the protozoan parasites Trypanosoma brucei, Trypanosoma cruzi, and Leishmania
Disclosed are novel carbapenem derivatives characterized by a 2-substituent of the formula ##STR1## in which A represents cyclopentylene, cyclohexylene or C.sub.2 -C.sub.6 alkylene optionally substituted by one or more C.sub.1 -C.sub.4 alkyl groups and ##STR2## represents a quaternized nitrogen-containing aromatic heterocycle. Such derivatives are useful as potent antibacterial agents. Also disclosed are processes for the preparation of such derivatives and novel intermediates utilized in these processes.
Anti-Thyroid Drugs and Thyroid Hormone Synthesis: Effect of Methimazole Derivatives on Peroxidase-Catalyzed Reactions
作者:Gouriprasanna Roy、G. Mugesh
DOI:10.1021/ja054497u
日期:2005.11.1
moiety is important for the LPO inhibition. The kinetic and mechanisticstudies reveal that MSeI inhibits the LPO activity by reducing the H(2)O(2), providing a novel method to reversibly inhibit the enzyme. Although MSeI strongly inhibits LPO, the enzyme's activity can be completely recovered by increasing the H(2)O(2) concentration. On the other hand, the inhibition by methimazole (MMI), the sulfur
Comparative Study of Metal-Catalyzed Iminations of Sulfoxides and Sulfides
作者:Olga García Mancheño、Carsten Bolm
DOI:10.1002/chem.200700352
日期:2007.8.6
A comparativestudy of the imination of sulfur compounds with various metal catalysts in combination with isolated or in situ generated iminoiodinanes (PhI==NR) as nitrogen sources is presented. The influence of the metal catalyst towards the imination of a variety of substituted sulfoxides has been evaluated. Moreover, the effect of the different oxidation states of sulfur on the reactivity and selectivity