نتایج جستجو برای: sulfoxides
تعداد نتایج: 3344 فیلتر نتایج به سال:
A series of axially chiral bis-sulfoxide ligands have been efficiently synthesized via oxidative coupling with high diastereoselectivities. The axial chirality is well controlled by the tert-butylsulfinyl or the p-tolylsulfinyl group. These axially chiral bis-sulfoxides proved to be remarkably efficient ligands for the rhodium-catalyzed asymmetric 1,4-addition of arylboronic acids to 2-cyclohex...
Over the last three decades, the sulfinyl group has received considerable attention in asymmetric synthesis1‒5 as a chiral tool. The sulfinyl group is widely used as to bring about numerous asymmetric transformations. The effectiveness of the sulfoxide in diastereoselective auxiliary-induced reactions is mainly due to the steric and stereo electronic differences existing between the substituent...
We recently reported the detection of mercapturic acid pathway metabolites of bendamustine, namely, cysteine S-conjugates in human bile, which are supposed to subsequently undergo further metabolism. In this study, we describe the identification and quantitation of consecutive bendamustine metabolites occurring in human bile using authentic reference standards and the synthesis and structural c...
The solvent free route for the synthesis of diaryl sulfoxides from arenes and thionyl chloride in the presence of Lewis acids such as aluminum chloride and ferric chloride on silica gel are described.
NaBrO3 combined with NH4Cl is found to be an efficient reagent for the transformation of sulfides into sulfoxides in aqueous and under mild conditions.
A flavin-dependent group E monooxygenase ("GEM”) has been characterized by crystal-structure analysis, computational and kinetic studies to reveal substrate binding mechanistic details for this class of enzymes the first time. Based on these data, Dirk Tischler, Norbert Sträter, co-workers redesigned pocket synthesize chiral epoxides sulfoxides with high stereoselectivity, a true treasure molec...
a green, efficient and selective approach for the oxidation of sulfides to sulfoxides and sulfones with uhp at room temperature is reported. the reaction is performed in the presence of vanadia catalyst supported on mesocellular silica foam (mcf) with a v content ranging from 2% to 10% as heterogeneous and reusable catalyst. the structural and textural characterization of this catalyst were don...
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