Iron(III) Chloride as a Mild Catalyst for the Dearomatizing Cyclization of <i>N</i>-Acylindoles
作者:Jingyu Zhang、Jing Li、Jas S. Ward、Khai-Nghi Truong、Kari Rissanen、Markus Albrecht
DOI:10.1021/acs.joc.0c01373
日期:2020.10.2
A catalytic approach for the preparation of indolines by dearomatizing cyclization is presented. FeCl3 acts as a catalyst to afford tetracyclic 5a,6-dihydro-12H-indolo[2,1-b][1,3]benzoxazin-12-ones in good yields. The cyclization also proceeds with tosylamides forming C–N bonds in 53% yield.
提出了一种通过脱芳香环化反应制备二氢吲哚的催化方法。FeCl 3用作催化剂,以高收率得到四环5a,6-二氢-12 H-吲哚并[ 2,1 - b ] [1,3]苯并恶嗪-12-。环化反应还会继续进行,甲苯磺酰胺以53%的收率形成C–N键。
Tandem Iridium-Catalyzed Decarbonylative C–H Activation of Indole: Sacrificial Electron-Rich Ketone-Assisted Bis-arylsulfenylation
作者:Subban Kathiravan、Prasad Anaspure、Tianshu Zhang、Ian A. Nicholls
DOI:10.1021/acs.orglett.1c00829
日期:2021.5.7
the C2 and C4 C–H bonds through the use of pentamethylcyclopentadienyl iridium dichloride dimer ([Cp*IrCl2]2) catalyst and disulfides. A new sacrificial electron-rich adamantoyl-directing group facilitates indole C–H bis-functionalization with a traceless in situ removal. Various differently substituted disulfides can be easily accommodated in this reaction by a coordination to Ir(III) through the formation
An Asymmetric S<sub>N</sub>2 Dynamic Kinetic Resolution
作者:Nomaan M. Rezayee、Valdemar J. Enemærke、Sif T. Linde、Johannes N. Lamhauge、Gabriel J. Reyes-Rodríguez、Karl Anker Jørgensen、Chenxi Lu、K. N. Houk
DOI:10.1021/jacs.1c02193
日期:2021.5.19
stereocenter. Here we report an SN2 reaction that leads to enantioenrichment of product despite starting from a racemic mixture of starting material. The enantioconvergent reaction proceeds through a dynamic Walden cycle, involving an equilibrating mixture of enantiomers, initiated by a chiral aminocatalyst and terminated by a stereoselective SN2 reaction at a tertiary carbon to provide a quaternary carbon
S N 2 反应表现出经典的瓦尔登反转,表明亲核试剂对立体中心的立体有择性背面攻击。立体中心倒置的观察提供了 S N 2 型位移的证据。然而,这个准则取决于在离散立体中心上进行的替换。在这里,我们报告了一种 S N 2 反应,尽管从原料的外消旋混合物开始,但该反应仍会导致产物对映体富集。对映收敛反应通过动态瓦尔登循环进行,涉及对映异构体的平衡混合物,由手性氨基催化剂引发并由立体选择性 S N终止2 在叔碳上反应以提供季碳立体中心。计算、动力学和经验研究的结合阐明了手性有机催化剂的多方面作用,为 Curtin-Hammett 原理提供了一个模型示例。这些示例挑战了通过 S N 2 机制运行时仅由预定义立体中心产生的对映体富集产品的概念。基于这些原则,包括示例以突出该机制的一般性。我们预计不对称 S N 2 动态动力学分辨率将用于各种未来反应。
[EN] HETEROARYL COMPOUNDS FOR KINASE INHIBITION<br/>[FR] COMPOSÉS HÉTÉROARYLE D'INHIBITION DE LA KINASE
申请人:ARIAD PHARMA INC
公开号:WO2015195228A1
公开(公告)日:2015-12-23
Compounds and pharmaceutical compositions that modulate kinase activity, including mutant EGFR and mutant HER2 kinase activity, and compounds, pharmaceutical compositions, and methods of treatment of diseases and conditions associated with kinase activity, including mutant EGFRand mutant HER2 activity, are described herein.
Rhodium(III)‐Catalyzed Regioselective C−H Allylation and Prenylation of Indoles at C4‐Position
作者:Shang‐Shi Zhang、Yan‐Zhi Liu、Yi‐Chuan Zheng、Hui Xie、Shao‐Yong Chen、Jia‐Lin Song、Bing Shu
DOI:10.1002/adsc.202100882
日期:2022.1.4
Herein, Rh(III)-catalyzed C4-selective C−H allylation and prenylation of indoles by using a weak carbonyl coordination directing group have been reported. By employing 5-methylene-1,3-dioxan-2-ones, 4-vinyl-1,3-dioxolan-2-ones and 2-methyl-2,3-butadiene as scalable cross-coupling partners, these divergent synthesis protocols proceed smoothly under redox-neutral reaction conditions, delivering various