Nitric acid in the presence of supported P2O5 on silica gel: an efficient and novel reagent for oxidation of sulfides to the corresponding sulfoxides
作者:Abdol R. Hajipour、Behzad Kooshki、Arnold E. Ruoho
DOI:10.1016/j.tetlet.2005.06.052
日期:2005.8
This paper describes an efficient and easy method for oxidation of sulfides 1 to their corresponding sulfoxides 2 with nitric acid in the presence of supported P2O5 on silicagel under solvent-free conditions in high yields.
本文描述了一种高效,简便的方法,该方法是在硅胶上在无溶剂条件下,在负载的P 2 O 5的情况下,以高收率用硝酸将硫化物1氧化为其相应的亚砜2。
Transfer of Electrophilic NH Using Convenient Sources of Ammonia: Direct Synthesis of NH Sulfoximines from Sulfoxides
作者:Marina Zenzola、Robert Doran、Leonardo Degennaro、Renzo Luisi、James A. Bull
DOI:10.1002/anie.201602320
日期:2016.6.13
valuable motifs for drug discovery. The protocol employs readily available sources of nitrogen without the requirement for either preactivation or for metal catalysts. Mixing ammonium salts with diacetoxyiodobenzene directly converts sulfoxides into sulfoximines. This report describes the first example of using of ammonia sources with diacetoxyiodobenzene to generate an electrophilic nitrogen center.
Synthesis of Sulfoximine Carbamates by Rhodium-Catalyzed Nitrene Transfer of Carbamates to Sulfoxides
作者:Marina Zenzola、Robert Doran、Renzo Luisi、James A. Bull
DOI:10.1021/acs.joc.5b00844
日期:2015.6.19
convenient synthesis of N-protected sulfoximines is achieved, under mild conditions, by rhodium-catalyzed transfer of carbamates to sulfoxides. The first examples of 4-membered thietane-oximines are prepared. Sulfoximines bearing Boc and Cbz groups are stable to further cross coupling reactions, and readily deprotected. This method may facilitate the preparation of NH-sulfoximines providing improved (global)
Iron(II)-Catalyzed Direct Synthesis of NH Sulfoximines from Sulfoxides
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1002/anie.201710498
日期:2018.1.2
Free NH‐sulfoximines were directly prepared from sulfoxides through iron catalysis by applying a readily available, shelf‐stable hydroxylamine triflic acid salt. No additional oxidant is needed, and the substrate scope is broad, including a range of heterocyclic compounds.
Inhibition by carboxamides and sulfoxides of liver alcohol dehydrogenase and ethanol metabolism
作者:Vijay K. Chadha、Kevin G. Leidal、Bryce V. Plapp
DOI:10.1021/jm00360a024
日期:1983.6
and rat liveralcoholdehydrogenases with respect to ethanol as substrate. These compounds also were uncompetitive inhibitors in vivo, which is advantageous since the inhibition is not overcome at higher concentrations of ethanol, as it is with competitive inhibitors, such as pyrazole. The uncompetitive inhibition constants for tetramethylene sulfoxide and isovaleramide for rat liveralcohol dehydrogenase