Regioselective reduction of the α,β-double bond of some naturally occurring dienamides using NaBH4I2 system
摘要:
The regioselective reduction of the alpha,beta-double bond of the naturally occurring dienamides, piperine, piperlonguminine and N-isobutyl-2E, 4E-decadienamide was achieved by using NaBH4/I-2 system. (C) 1998 Elsevier Science Ltd. All rights reserved.
Chemoselective α,β‐Dehydrogenation of Saturated Amides
作者:Christopher J. Teskey、Pauline Adler、Carlos R. Gonçalves、Nuno Maulide
DOI:10.1002/anie.201808794
日期:2019.1.8
We report a method for the selective α,β‐dehydrogenation of amides in the presence of other carbonyl moieties under mild conditions. Our strategy relies on electrophilic activation coupled to in situ selective selenium‐mediated dehydrogenation. The α,β‐unsaturated products were obtained in moderate to excellent yields, and their synthetic versatility was demonstrated by a range of transformations.
我们报告了一种在温和条件下在其他羰基存在下选择性 α,β-脱氢酰胺的方法。我们的策略依赖于亲电激活与原位选择性硒介导的脱氢作用相结合。α,β-不饱和产物以中等至优异的收率获得,并且它们的合成多功能性通过一系列转化得到证明。机理实验表明亲电子 Se IV物质的形成。
Synthesis of conjugated dienes <i>via</i> palladium-catalysed aerobic dehydrogenation of unsaturated acids and amides
A Pd(II)-catalyzed direct aerobic dehydrogenation of γ,δ-olefinic acids and amides has been demonstrated. The present protocol dehydrogenates the least acidic amides and acids, thus replacing the traditional enolate strategy for dehydrogenation. A broad spectrum of conjugated dienamides and dienoic acids were produced in good to excellent yields. A possible reaction mechanism was proposed and supported
已经证明了 Pd( II ) 催化的 γ,δ-烯酸和酰胺的直接需氧脱氢。本协议脱氢最少的酸性酰胺和酸,从而取代了传统的烯醇脱氢策略。以良好至优异的产率生产了广谱的共轭二酰胺和二烯酸。氘标记研究提出并支持了一种可能的反应机制。
Copper-catalyzed hydroaminocarbonylation of benzylidenecyclopropanes: synthesis of γ,δ-unsaturated amides
作者:Hui-Qing Geng、Xiao-Feng Wu
DOI:10.1039/d2cc02301f
日期:——
benzylidenecyclopropanes under relatively mild conditions. A series of γ,δ-unsaturated amides with a broad range of functional groups were obtained in moderate to good yields. Both dialkyl-substituted and monoalkyl-substituted hydroxylamine derivatives can be applied in this transformation to give the corresponding tertiary and secondaryamides successfully.
METHOD AND COMPOSITION FOR PREVENTING AND TREATING VIRAL INFECTIONS
申请人:Global BioLife Inc.
公开号:US20220401403A1
公开(公告)日:2022-12-22
A method and composition for treating viral infections using a combination of naturally occurring compounds is provided. The method includes administering to a patient at risk of or diagnosed with a viral infection a composition including therapeutically effective amounts of a myricetin and hesperitin to treat viral infections include coronavirus.
Regioselective reduction of the α,β-double bond of some naturally occurring dienamides using NaBH4I2 system
作者:Biswanath Das、A Kashinatham、P Madhusudhan
DOI:10.1016/s0040-4039(97)10590-1
日期:1998.2
The regioselective reduction of the alpha,beta-double bond of the naturally occurring dienamides, piperine, piperlonguminine and N-isobutyl-2E, 4E-decadienamide was achieved by using NaBH4/I-2 system. (C) 1998 Elsevier Science Ltd. All rights reserved.