via AlCl3-mediated cyclization reaction and I2-promoted sequential oxidation reaction of 2-aminobenzenethiols with arylacetonitriles was developed. This reaction proceeds smoothly with a wide range of arylacetonitriles containing different functional groups to give the corresponding products in moderate to good yields under mild conditions. Moreover, this reaction was conveniently conducted on a gram
开发了一种有效的一锅法,通过AlCl 3介导的环化反应和 I 2促进的 2-氨基苯硫醇与芳基乙腈的顺序氧化反应获得 2-酰基苯并噻唑。该反应与各种含有不同官能团的芳基乙腈一起顺利进行,在温和的条件下以中等至良好的收率得到相应的产物。此外,该反应方便地以克规模进行,产率仍高达68%。
I2 promoted domino oxidative cyclization for one-pot synthesis of 2-acylbenzothiazoles via metal-free sp3 C–H functionalization
An I(2) promoted domino protocol was developed to construct 2-acylbenzothiazoles from simple and readily available aromatic ketones/unsaturated methyl ketones and o-aminobenzenethiols. The reaction proceeded smoothly under metal-free and peroxide-free conditions.
The tunable synthesis of benzothiazole functionalized vicinal diketones and 2-aroylbenzothiazoles has been realized by tailoring the enaminone CC double bond.
Oxidant/Solvent-Controlled I<sub>2</sub>-Catalyzed Domino Annulation for Selective Synthesis of 2-Aroylbenzothiazoles and 2-Arylbenzothiazoles under Metal-Free Conditions
作者:Renchao Ma、Yuxin Ding、Rener Chen、Zhiming Wang、Lei Wang、Yongmin Ma
DOI:10.1021/acs.joc.0c02095
日期:2021.1.1
A simple and practical domino protocol for the selective synthesis of 2-aroylbenzothiazoles and 2-aryl benzothiazoles catalyzed by I2 is developed under metal-free conditions. The reaction outcomes are exclusively controlled by the reaction oxidant/medium. With DMSO employed as both the solvent and the oxidant, an oxidation of aromatic methyl ketones takes precedence over the condensation with 2-aminobenzenethiols
Copper-II mediated tandem reaction between aromatic ketones and 2-aminobenzenethiol for the synthesis of 2-aroylbenzothiazoles
作者:Jaishree K. Mali、Devidas A. Mali、Vikas N. Telvekar
DOI:10.1016/j.tetlet.2016.04.058
日期:2016.5
A novel copper(II) mediated tandem reaction was developed for the synthesis of 2-aroylbenzothiazoles from readily available aryl–alkyl ketones in the presence of oxygen in ethanol. This method is mild, operationally simple, makes the use of inexpensive CuBr2 as mediator, and affords the corresponding 2-aroylbenzothiazoles in moderate to good yield.