N-Heterocyclic Carbene/Magnesium Cocatalyzed Radical Relay Assembly of Aliphatic Keto Nitriles
作者:Lei Chen、Shiyi Jin、Jian Gao、Tongtong Liu、Yuebo Shao、Jie Feng、Kangyi Wang、Tao Lu、Ding Du
DOI:10.1021/acs.orglett.0c03883
日期:2021.1.15
magnesium cocatalyzed three-component acylcyanoalkylation of alkenes with cycloketone oxime esters and aldehydes is presented. This method displayed good scope generality, providing a transition-metal- and photoredox-free pathway to access various multifunctionalized aliphatic keto nitrile structures undermildreactionconditions. Moreover, this strategy is supposed to follow a radical relay mechanism via
Iron-catalyzed intermolecular C–C bond vinylation of cycloketoximes promoted by diboron
作者:Xingxuan Xia、Xi Chen、Binlin Zhao、Yu Yuan
DOI:10.1016/j.tet.2022.133179
日期:2023.1
radical-mediated ring opening of cycloketoxime promoted by diboron compound is reported. This strategy provides alternative catalytic routes for the selective C–C bond vinylation, which provides effective approaches for the preparation of various distal-cyanoalkyl alkenes. The experimental explorations showed that the diboron reagent played important roles during the catalytic cycle. And a reasonable
between oxime ester and benzothiazole is described, which involves C–C bond cleavage of oxime ester via a single-electron transfer process. This iron catalytic system performed in water under mild reaction conditions offers a streamlined strategy to the construction of alkyl nitrile substituted benzothiazole derivatives. Application of this strategy for the synthesis of some key important compounds
描述了肟酯和苯并噻唑之间的 Fe 催化偶联反应,该反应涉及通过单电子转移过程使肟酯的 C-C 键断裂。这种在温和反应条件下在水中进行的铁催化体系为构建烷基腈取代的苯并噻唑衍生物提供了一种简化的策略。还报道了该策略在合成一些关键重要化合物(包括 4-杂环-3-芳基丁酸)中的应用。
Diboron-promoted iron-catalyzed denitrative vinylation of β-nitrostyrenes with cycloketoximes
作者:Dingcheng Shi、Xingxuan Xia、Binlin Zhao、Yu Yuan
DOI:10.1039/d3ob00890h
日期:——
We have developed a new iron-catalyzed ring opening alkenylation of cycloketoximes with β-nitrostyrenes for the facile synthesis of flexible distal cyanoalkyl alkenes. Both non-active strained cycloketoximes and less-strained cycloketoximes could be coupled with β-nitrostyrenes with excellent regio- and stereoselectivity under base-free redox-neutral conditions. The diboron reagent played an irreplaceable