A Base-Promoted One-Pot Asymmetric Friedel–Crafts Alkylation/Michael Addition of 4-Substituted Indoles
作者:Robert Connon、Laura Carroll、Patrick J. Guiry
DOI:10.1055/s-0039-1690241
日期:2020.4
novel class of 4-substituted bis(indole)methane derivatives were serendipitously prepared in excellent yield by reacting 4-substituted indole derivatives with 4-nitrobenzaldehyde. One bis(indole)methane was characterized by X-ray crystallographic analysis. Herein, we report a base-promoted Zn(II)–bis(oxazoline)-catalyzed one-pot Friedel–Crafts alkylation/Michaeladdition of 3-(indol-4-yl)acrylonitrile
Geometrically Selective Denitrative Trifluoromethylthiolation of β-Nitrostyrenes with AgSCF<sub>3</sub> for (<i>E</i>)-Vinyl Trifluoromethyl Thioethers
作者:Changge Zheng、Shuai Huang、Yang Liu、Chao Jiang、Wei Zhang、Ge Fang、Jianquan Hong
DOI:10.1021/acs.orglett.0c01714
日期:2020.6.19
An efficient copper(II)-promoted denitrative trifluoromethylthiolation under mild reaction conditions has been developed for vinyl trifluoromethyl thioethers to construct Cvinyl–SCF3 bonds with stable AgSCF3 as a source of the trifluoromethylthio. This reaction system tolerates a broad range of functional groups to commendably achieve a high product yield and excellent stereoselectivity of E/Z.
A facile tandem decyanation/cyanation reaction of α-iminonitriles toward cyano-substituted amides
作者:Zhengwang Chen、Pei Liang、Botao Liu、Haiqing Luo、Jing Zheng、Xiaowei Wen、Tanggao Liu、Min Ye
DOI:10.1039/c8ob02186d
日期:——
A newtandem decyanation/cyanation reaction of α-iminonitriles has been developed. A variety of cyano-substituted aryl amides and heteroaryl amides are synthesized in good yields. Both electron-rich and electron-deficient groups are compatible with the standard conditions. This reaction features a nonmetallic cyano source, tandem decyanation and cyanation reaction, waste utilization of the HCN from
A Tandem Asymmetric Friedel-Crafts Alkylation/Michael Addition: Synthesis of Novel Ergoline Derivatives
作者:Robert Connon、Patrick J. Guiry
DOI:10.1002/ejoc.201901007
日期:2019.9.15
development of an asymmetric tandem Friedel–Crafts alkylation/Michael addition of 4‐substituted indoles with trans‐β‐nitrostyrene derivatives. We could control the formation of three contiguous chiral centers in one step in 57 %–99 % yield and up to > 99 % ee. This methodology provides easyaccess to a range of novel C4‐substituted products containing the tricyclic core of the ergoline skeleton.
Pd‐Catalyzed Tandem Pathway for Stereoselective Synthesis of (<i>E</i>)‐1,3‐Enyne from <i>β</i>‐Nitroalkenes by Using a Sacrificial Directing Group
作者:Subal Mondal、Siba P. Midya、Suman Das、Soumya Mondal、Abu S. M. Islam、Pradyut Ghosh
DOI:10.1002/chem.202301637
日期:2023.11.2
Dancing hybridization: The first example of efficient and stereoselective (E)-1,3-enyne synthesis exclusively from alkene substrates is described. Inauguration of nitro group as a sacrificial directing group, formation of magical triple bond by promoting zero-order to third-order upgradation make this methodology atom and step efficient with sustainability.
跳舞杂交:描述了仅从烯烃底物有效且立体选择性 ( E )-1,3-烯炔合成的第一个例子。硝基作为牺牲导向基团的诞生,通过促进零级到三级升级形成神奇的三键,使该方法原子和步骤高效且可持续。