PPh<sub>3</sub>⋅HBr-DMSO Mediated Expedient Synthesis of γ-Substituted β,γ-Unsaturated α-Ketomethylthioesters and α-Bromo Enals: Application to the Synthesis of 2-Methylsulfanyl-3(<i>2 H</i>)-furanones
作者:Kanchan Mal、Abhinandan Sharma、Prakas R. Maulik、Indrajit Das
DOI:10.1002/chem.201303755
日期:2014.1.13
An efficient chemoselective general procedure for the synthesis of γ‐substituted β,γ‐unsaturatedα‐ketomethylthioesters from α,β‐unsaturatedketones has been achieved through an unprecedented PPh3⋅HBr‐DMSO mediated oxidative bromination and Kornblum oxidation sequence. The newly developed reagent system serves admirably for the synthesis of α‐bromoenals from enals. Furthermore, AuCl3‐catalyzed efficient
Oxidative Asymmetric Formal Aza-Diels–Alder Reactions of Tetrahydro-β-carboline with Enones in the Synthesis of Indoloquinolizidine-2-ones
作者:Xiang Wu、Shi-Bao Zhao、Lang-Lang Zheng、You-Gui Li
DOI:10.3390/molecules23092228
日期:——
Ru-catalyzed tandem amine oxidative dehydrogenation/formal aza-Diels⁻Alder reaction for enantio- and diastereoselective synthesis of indoloquinolizidine-2-ones from tetrahydro-β-carbolines and α,β-unsaturated ketones is described. The reaction proceeds viatandem ruthenium-catalyzed amine dehydrogenation using tert-butyl hydroperoxide (TBHP) as the oxidant and a chiral thiourea-catalyzed formal aza-[4
Arylamine Ketones, Their Preparation Methods, The Pharmaceutical Composition Containing Them And Their Use
申请人:Zhu Liya
公开号:US20080221106A1
公开(公告)日:2008-09-11
Disclosed Arylamine ketones of formula (I), their preparation methods, the pharmaceutical compositions containing them and their use in preventing and/or treating the diseases related to the plaque-activating factors, especially in anti-inflammation and immunization, more especially in the treatment of the acute or chronic inflammation, such as, osteoarthritis, oarthritis deformans, etc.