Synthesis of some benzothiazoles by developing a new protocol using urea nitrate as a catalyst and their antimicrobial activities

ABSTRACT

The present communication demonstrates the development of urea nitrate as an effective and efficient catalyst for the synthesis of some 2-substituted benzothiazoles. Instant progress of reaction at room temperature under solvent-free condition, very high catalytic activity, inexpensive, clean reaction profile, operational simplicity, large-scale synthesis and appreciable yields are the main advantages of this protocol. These synthesized benzothiazoles have been evaluated for their antibacterial and antifungal activities against Gram-positive bacterium (Bacillus subtilis MTCC 121); two Gram-negative bacteria (Escherichia coli MTCC 1652 and Pseudomonas aeruginosa MTCC 741) and two fungi (Candida albicans MTCC 3017 and Saccharomyces cerevisiae MTCC 170). Compound 3n was found the most active against all the tested microbes.

GRAPHICAL ABSTRACT

KEYWORDS:

• Benzothiazoles
• urea nitrate
• antimicrobial activity
• solvent-free synthesis
• catalyst

Acknowledgements

Financial support as junior research fellowship (JRF) by the Haryana State Council of Science and Technology is gratefully acknowledged for accomplishing this work.

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Parvin Kumar http://orcid.org/0000-0002-2635-6465