A one-pot “back-to-front” approach for the synthesis of benzene ring substituted indoles using allylboronic acids
作者:Ganesh Karan、Samrat Sahu、Modhu Sudan Maji
DOI:10.1039/d1cc01512e
日期:——
Synthesis of only benzene ring functionalized indoles and poly-substituted carbazoles is reported via a one-pot triple cascade benzannulation protocol. Usage of differently substituted and readily accessible allylboronic acids as a 3-carbon annulating partner enables diverse aliphatic and aromatic substitution patterns, which is still a daunting task. This scalable synthetic protocol tolerates broad
Iodine-Mediated Electrochemical C(sp<sup>2</sup>)–H Amination: Switchable Synthesis of Indolines and Indoles
作者:Kangfei Hu、Yan Zhang、Zhenghong Zhou、Yu Yang、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.orglett.0c01821
日期:2020.8.7
A metal-free electrochemical intramolecular C(sp2)–Hamination using iodine as a mediator was developed. This method enables a switchable synthesis of indoline and indole derivatives, respectively, from easily available 2-vinyl anilines.
Metal-free borylative dearomatization of indoles: exploring the divergent reactivity of aminoborane C–H borylation catalysts
作者:Arumugam Jayaraman、Luis C. Misal Castro、Vincent Desrosiers、Frédéric-Georges Fontaine
DOI:10.1039/c8sc01093e
日期:——
1-arylsulfonyl indoles with pinacolborane in a syn addition fashion, with H and Bpin groups added respectively to the 2 and 3 positions of indoles. Catalysis proceeds with good to excellent conversion and essentially with complete regio- and diastereoselectivity. From mechanistic insights and DFT computations, we realized and established that prototypical boranes can also catalyze this borylative dearomatization
尽管通过碳-硼键形成反应使吲哚脱芳香化是新的且很有前途,但到目前为止,它们主要是金属催化的。在这里,我们建立了使用无金属催化剂以原子有效方式促进此类反应的方法。该原位生成的两亲性氨基硼烷催化剂(1-PIP-2-BH 2 -C 6 H ^ 4)2(PIP =哌啶基)促进与频哪醇的各种1-芳基磺酰基吲哚的脱芳构化borylative在一个顺H和BPIn基团分别添加到吲哚的2和3位上。催化进行的转化具有良好至优异的转化率,并且基本上具有完全的区域选择性和非对映选择性。从力学的见解和DFT计算中,我们认识到并确定原型硼烷也可以催化这种硼基脱芳香化反应。
Unveiling a Strategy for Ring Opening of Epoxides: Synthesis of 2-Hydroxyindolinylidenes Using α-Ester Sulfoxonium Ylides
作者:Viktor S. Camara、Aislan L. da Silva、Lilian C. da Luz、Fabiano S. Rodembusch、Pedro H. O. Santiago、Javier Ellena、Antonio C. B. Burtoloso
DOI:10.1021/acs.orglett.3c04169
日期:2024.2.9
α-carbonyl sulfoxonium ylides in epoxidering-openingreactions has been a notable gap in current research, with such reactivity predominantly associated with the highly reactive dimethylsulfoxonium methylide. This study introduces an innovative approach wherein an epoxide indole, formed in situ from 2-hydroxyindoline-3-triethylammonium bromide, undergoes reaction with α-ester sulfoxonium ylides. The