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Iron(III)-Catalyzed Regioselective Synthesis of Electron-Rich Benzothiazoles from Aryl Isothiocyanates via C-H Functionalization. 2023
Bokka Srinivas, and
Kotari Shakeena, and
Durgeswari Lakkavarapu Kota, and
Valeti Abhinav, and
Pyla Eswar, and
Rongali Geetha Sravani, and
Anandam Sampath Pavan Kumar, and
Kiran Indukuri, and
Kumpatla Ayyappa Dhanaraju, and
Muthyala Murali Krishna Kumar, and
Santhosh Kumar Alla
Department of Chemistry, GITAM School of Science, GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, Andhra Pradesh 530045, India.
We report herein a direct synthetic route for the preparation of 2-arylbenzothiazoles using aryl isothiocyanates and electron-rich arenes. The synthetic route involves triflic acid promoted addition of the arenes to aryl isothiocyanates followed by FeCl3-catalyzed C-S bond formation via C-H functionalization. The approach provides the advantage of synthesis of benzothiazoles without the conventional use of aryl aldehyde/carboxylic acid precursors employing the less expensive iron(III) catalyst.
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