Concise Access to 2-Aroylbenzothiazoles by Redox Condensation Reaction between o-Halonitrobenzenes, Acetophenones, and Elemental Sulfur
摘要:
A wide range of 2-aroylbenzothiazoles 3 including some pharmacologically, relevant derivatives can be obtained in high yields by simply heating o-halonitrobenzenes 1, acetophenones 2, elemental sulfur, and N-methylmorpholine. This three-component nitro methyl Coupling was found to occur in an excellent atom-, step-, an redox-efficient manner in which elemental sulfur prayed the role of nucleophile building block and redox moderating agent to fulfill electronic requirements of the global reaction.
A condition-controlled strategy for selectively synthesis of 2-acylbenzothiazoles and bibenzo[b][1,4]thiazines from aryl methyl ketones and disulfanediyldianilines was realized using I2/DMSO or I2/MeCN systems, respectively. The desired products were synthesized in only 15 min with moderate to excellent yields (50%-90%) under microwave-assisted, metal-free conditions. The strategy provides a great
分别使用 I 2 /DMSO 或 I 2 /MeCN 系统实现了从芳基甲基酮和二硫烷二基二苯胺选择性合成 2-酰基苯并噻唑和联苯[ b ][1,4]噻嗪的条件控制策略。在微波辅助、无金属条件下,所需产物仅在 15 分钟内合成,产率中等至极好(50%-90%)。该策略为苯并噻唑和双苯并噻嗪杂环化合物的有效合成中的选择性合成应用提供了巨大优势。
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
[EN] SELECTIVE 17BETA-HYDROXYSTEROID DEHYDROGENASE TYPE 1 INHIBITORS<br/>[FR] INHIBITEURS SÉLECTIFS DE LA 17-BÊTA-HYDROXYSTÉROÏDE DÉSHYDROGÉNASE DE TYPE 1
申请人:UNIV SAARLAND
公开号:WO2012025638A1
公开(公告)日:2012-03-01
The invention relates to selective, non-steroidal 17beta-hydroxysteroid dehydrogenase type 1 (17β-HSD1) inhibitors their production and use, especially for the treatment and/or prophylaxis of hormone-related diseases.
New synthesis of 2-aroylbenzothiazoles <i>via</i> metal-free domino transformations of anilines, acetophenones, and elemental sulfur
作者:Tien V. Huynh、Khang V. Doan、Ngoc T. K. Luong、Duyen T. P. Nguyen、Son H. Doan、Tung T. Nguyen、Nam T. S. Phan
DOI:10.1039/d0ra01750g
日期:——
A new synthesis of 2-aroylbenzothiazoles via iodine-promoted domino transformations of anilines, acetophenones, and elemental sulfur was demonstrated. The highlights of this tandem synthesis are (1) easily available anilines and acetophenones as feedstock; (2) transition metal-free conditions; (3) inexpensive, nontoxic, easy handling, and abundant elemental sulfur as a building block. This synthetic
An Efficient Copper-Mediated Route for the Synthesis of 2-Substituted Benzothiazoles from Dithioesters and Investigation of Their Antibacterial Activities
作者:Maralinganadoddi P. Sadashiva、Kodipura P. Sukrutha、Kuppalli R. Kiran、Kodagahally T. Gunashree、Shivakumar Divyashree、Prerana Purusotham、Marikunte Y. Sreenivasa
DOI:10.1055/a-2193-5436
日期:2024.2
one-pot synthesis of 2-aryl/2-aroylbenzothiazoles through copper-mediated condensation of 2-chloroanilines with dithioesters has been developed. The method provides good isolated yields and exhibits broad functional group tolerance, accommodating both electron-donating and electron-withdrawing groups on the substrates. A series of synthesized compounds was evaluated for their antibacterial activity against