Alum (KAl(SO4)2·12H2O)-Catalyzed, Eco-Friendly, and Efficient One-Pot Synthesis of 2-Arylbenzothiazoles and 2-Arylbenzoxazole in Aqueous Medium

Shivaji S. Pawar; Deepak V. Dekhane; Murlidhar S. Shingare; Shivaji N. Thore

doi:10.1071/CH08122

RESEARCH ARTICLE

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Alum (KAl(SO₄)₂·12H₂O)-Catalyzed, Eco-Friendly, and Efficient One-Pot Synthesis of 2-Arylbenzothiazoles and 2-Arylbenzoxazole in Aqueous Medium

Shivaji S. Pawar ^A , Deepak V. Dekhane ^A , Murlidhar S. Shingare ^B and Shivaji N. Thore ^A ^C

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, Vinyakrao Patil Mahavidyala Vaijapur, Aurangabad-423 701, Maharashtra, India.

^B Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University, Aurangabad-431 004, Maharashtra, India.

^C Corresponding author. Email: snthore@rediffmail.com

Australian Journal of Chemistry 61(11) 905-909 https://doi.org/10.1071/CH08122
Submitted: 25 March 2008 Accepted: 16 September 2008 Published: 5 November 2008

Abstract

Alum (KAl(SO₄)₂·12H₂O) performs as a novel catalyst for the synthesis of 2-arylbenzothiazoles and 2-arylbenzoxazole from o-aminothiophenol and o-aminophenol with various substituted aldehydes in good to excellent isolated yields (85–95%) using water as a solvent at ambient temperature. Several solvents were examined for this reaction; however, in terms of reaction yield and time, water was found to be the optimum solvent. The remarkable advantages offered by this method are an inexpensive and easily available catalyst, a simple procedure, mild conditions, much faster (60–90 min) reactions, and good to excellent yields of products.

Acknowledgements

The authors are thankful to the Head, Department of Chemistry, Vinyakrao Patil Mahavidyala Vaijapur-423 701 (MS), India, for partial support of the present work.

References

Alum (KAl(SO4)2·12H2O)-Catalyzed, Eco-Friendly, and Efficient One-Pot Synthesis of 2-Arylbenzothiazoles and 2-Arylbenzoxazole in Aqueous Medium

Abstract

Acknowledgements

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Alum (KAl(SO₄)₂·12H₂O)-Catalyzed, Eco-Friendly, and Efficient One-Pot Synthesis of 2-Arylbenzothiazoles and 2-Arylbenzoxazole in Aqueous Medium