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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 49, 2019 - Issue 23
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ARTICLES

Metal free montmorillonite KSF clay catalyzed practical synthesis of benzoxazoles and benzothiazoles under aerobic conditions

Vijaya Babu KummariCentre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India;
,
Kalavakuntla ChiranjeeviCentre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India;
,
Alleni Suman KumarCentre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India;
,
Rathod Aravind KumarCentre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India;
&
Jhillu Singh YadavSchool of Science, Indrashil University, Mehsana, IndiaCorrespondence[email protected]
Pages 3335-3342 | Received 25 Jul 2019, Published online: 24 Sep 2019
 
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Abstract

An efficient method for the synthesis of benzoxazoles and benzothiazoles via montmorillonite KSF clay catalyzed condensation reaction between 2-aminophenols or 2-aminothiophenols and β-diketones is reported. The efficiency of the reaction reflects from the wide substrate scope with electronic differentiation on aryls. The reaction is metal free and proceeds without the exclusion of air or moisture, and further the catalyst can be recycled up to 3–5 catalytic cycles.

Graphical Abstract

Acknowledgements

K. V. B thanks UGC and K. C, A. S thanks CSIR, New Delhi, for the award of fellowship.

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