Platinum-catalyzed consecutive C–N bond formation-[1,3] shift of carbamoyl and ester groups
摘要:
The reaction of ortho-alkynylphenylureas 1 having a carbamoyl group attached to the nitrogen atom proceeded in the presence of catalytic amounts of Ptl(4), affording corresponding indole-3-carbamides 2 in moderate to high yields. In addition, the platinum-catalyzed cyclization of ortho-alkynylphenyl carbamates 3 afforded corresponding indole-3-carboxylates 4 in good yields. The present reaction proceeds through the intramolecular addition of carbon-nitrogen bonds to triple bonds, the so-called carboamination. (c) 2009 Elsevier Ltd. All rights reserved.
Electrochemical 1,2‐Diarylation of Alkenes Enabled by Direct Dual C–H Functionalizations of Electron‐Rich Aromatic Hydrocarbons
作者:Jing‐Hao Qin、Mu‐Jia Luo、De‐Lie An、Jin‐Heng Li
DOI:10.1002/anie.202011657
日期:2021.1.25
A cobalt‐promoted electrochemical 1,2‐diarylation of alkenes with electron‐rich aromatic hydrocarbons via direct dual C−H functionalizations is described, which employs a radical relay strategy to produce polyaryl‐functionalized alkanes. Simply by using graphite rod cathode instead of platinum plate cathode, chemoselectivity of this radical relay strategy is shifted to the dehydrogenative [2+2+2] cycloaddition
描述了通过直接双CH功能将钴与富电子芳烃进行烯烃促进的电化学1,2-二芳基化反应,该方法采用自由基中继策略来生产聚芳基官能化的烷烃。只需使用石墨棒阴极而不是铂板阴极,这种自由基中继策略的化学选择性就可以通过1,2-二芳基化,环化和脱氢级联反应转变为脱氢[2 + 2 + 2]环加成反应,从而形成复杂的11,12-二氢吲哚[2,3- a ]咔唑。机理研究表明,自由基中继过程的关键步骤是将芳烃转化为芳基sp 2通过使相应的芳基自由基阳离子中间体与碱去质子化,使碳中心自由基杂交。
AUTOTAXIN INHIBITOR COMPOUNDS
申请人:PharmAkea, Inc.
公开号:US20160235713A1
公开(公告)日:2016-08-18
Described herein are compounds that are autotaxin inhibitors, methods of making such compounds, pharmaceutical compositions and medicaments comprising such compounds, and methods of using such compounds in the treatment of conditions, diseases, or disorders associated with autotaxin activity.
Direct arene C−H functionalization via nucleophilic aromatic substitution remains a challenging task. Here we report an iridium nitrenoid-catalysed arene C−H functionalization strategy, making use of readily available aryl azides as electrophiles to react with different nucleophilicreaction partners. The practicality of this methodology is demonstrated by enantioselective synthesis of chiral 2-amino-2′-hydroxy-1