Synthesis and evaluation of monoamidoxime derivatives: Toward new antileishmanial compounds
摘要:
A new series of monoamidoxime derivatives was synthesized using manganese(III) acetate by microwave irradiation. Several amidoximes (27-31, 33, 38) showed valuable in vitro activities toward Leishmania donovani promastigotes, exhibiting IC50 values between 5.21 and 7.89 mu M. In parallel, the cytotoxicity of these compounds was evaluated on murine J774A.1 cells, revealing the corresponding selectivity index (SI). Among the 13 tested compounds, 4 monoamidoximes (27-30) exhibited an SI more than 20 times better than pentamidine. Moreover, monoamidoxime 28 (4-[5-Benzyl-3-(4-fluorophenylsulfonyl)-5-methyl-4,5-dihydrofuran-2-yl]-N'-hydroxybenzimidamide) is 40 times more selective than pentamidine, and 1.6 times more than amphotericin B, used as reference drug compounds. (C) 2011 Elsevier Masson SAS. All rights reserved.
Functionalization of Alkynes and Alkenes Using a Cascade Reaction Approach: Synthesis of β-Keto Sulfones under Metal-free Conditions
作者:Mukesh Kumar、Riyaz Ahmed、Maninder Singh、Shweta Sharma、Thanusha Thatikonda、Parvinder Pal Singh
DOI:10.1021/acs.joc.9b02779
日期:2020.1.17
reporting a multicomponent cascade reaction approach for the synthesis of β-keto sulfones by exploiting differential reactivity pattern of substrates under open-atmosphere and metal-free conditions. The coupling partners are aryldiazonium salts, unsaturated compounds, and DABSO. The optimized conditions worked well with both alkenes and alkynes. Moreover, the reaction also works with metabisulfite for
Visible-light-induced direct oxysulfonylation of alkynes with sulfonyl chlorides and HCl
作者:Tengfei Niu、Dingyun Jiang、Bangqing Ni
DOI:10.1016/j.tetlet.2017.09.083
日期:2017.11
efficient strategy to prepare β-keto sulfones has been developed by visible-light-induced reactions. This reaction involved Ir(dtbbpy)(ppy)2PF6-catalyzed direct functionalization of alkynes with sulfonylchloride and HCl using air as the oxidant. HCl not only acted as a hydrogen source in the proton transfer process, but also played a vital role in the reaction process.