Transition-metal-free chemo- and regioselective vinylation of azaallyls
作者:Minyan Li、Osvaldo Gutierrez、Simon Berritt、Ana Pascual-Escudero、Ahmet Yeşilçimen、Xiaodong Yang、Javier Adrio、Georgia Huang、Eiko Nakamaru-Ogiso、Marisa C. Kozlowski、Patrick J. Walsh
DOI:10.1038/nchem.2760
日期:2017.10
regioselective coupling protocol between 3-aryl-substituted-1,1-diphenyl-2-azaallyl derivatives and vinyl bromides has been developed. This is the first transition-metal-free cross-coupling of azaallyls with vinyl bromide electrophiles and delivers allylic amines in excellent yields (up to 99%). This relatively simple and mild protocol offers a direct and practical strategy for the synthesis of high-value
Practical One‐Pot Multistep Synthesis of 2H‐1,3‐Benzoxazines Using Copper, Hydrogen Peroxide, and Triethylamine
作者:Rachel Trammell、Alexandra Cordova、Shuming Zhang、Sunipa Goswami、Richel Murata、Maxime A. Siegler、Isaac Garcia‐Bosch
DOI:10.1002/ejoc.202100783
日期:2021.8.26
Herein, a simple one-pot synthesis of 2H-1,3-benzoxazines from imino-pyridines substrates using copper, H2O2, and NEt3 is described. Mechanistic studies were performed and suggested that cyclization occurred via the formation of 2-azallyl intermediates. Understanding of the cyclization mechanism allowed the developing of reaction conditions by using catalytic amounts of Cu.
本文介绍了一种使用铜、H 2 O 2和 NEt 3从亚氨基吡啶底物一锅法合成 2H-1,3-苯并恶嗪的简单方法。进行了机理研究并表明环化是通过形成 2-氮杂烯丙基中间体而发生的。对环化机制的了解允许通过使用催化量的 Cu 来开发反应条件。
An Efficient Route to Isochromene Derivatives via Cascade Radical Cyclization and Radical‐Radical Coupling
synthesis is generally limited to cyclization of phenyl propargyl ether precursors under transition metal catalyzed conditions. Herein, we present a novel disconnection that rapidly constructs isochromene derivativesthrough a cascade radicalcyclization strategy. Generation of aryl radicals by SET reduction of 2‐iodo benzyl allenyl ethers is followed by radicalcyclization to construct the isochromene
[EN] HETEROARYL COMPOUNDS AS CXCR4 INHIBITORS, COMPOSITION AND METHOD USING THE SAME<br/>[FR] COMPOSÉS HÉTÉROARYLÉS UTILISÉS COMME INHIBITEURS DE CXCR4, COMPOSITION ET PROCÉDÉ D'UTILISATION DE CEUX-CI
申请人:SUZHOU YUNXUAN YIYAO KEJI YOUXIAN GONGSI
公开号:WO2019060860A1
公开(公告)日:2019-03-28
The present disclosure provides heteroaryl compounds of Formula (I), processes for their preparation, pharmaceutical compositions containing them, and their use in the treatment of diseases and disorders, arising from or related to the CXCR4 pathway.
protocol for the regioselective hydroxylation of sp2 and sp3 C–H bonds using a directing group, stoichiometric amounts of Cu and H2O2. A wide array of aromatic ketones and aldehydes are oxidized in the carbonyl γ-position with remarkable yields. We also expanded this methodology to hydroxylate the β-position of alkylic ketones. Spectroscopic characterization, kinetics, and density functional theory calculations
与其他金属相比,将铜用于C–H键功能化的研究相对较少。在本文中,我们报告了使用导向基团,化学计量的Cu和H 2 O 2对sp 2和sp 3 C–H键的区域选择性羟基化的合成方案。各种各样的芳族酮和醛在羰基γ位被氧化,收率很高。我们还扩展了该方法以羟基化烷基酮的β-位。光谱表征,动力学和密度泛函理论计算都指向单核LCu II(OOH)物种的参与,该物种会氧化芳香族sp 2 通过协调的杂合O-O键裂解C-H键,并伴随对芳烃系统的亲电子攻击。