Metal free montmorillonite KSF clay catalyzed practical synthesis of benzoxazoles and benzothiazoles under aerobic conditions |
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Authors: | Vijaya Babu Kummari Kalavakuntla Chiranjeevi Alleni Suman Kumar Rathod Aravind Kumar |
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Institution: | Centre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, India |
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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. |
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Keywords: | β-diketones benzothiazoles benzoxazoles metal free reaction o-amino phenols/thiophenols |
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