Volume 35, Issue 12 e6426
FULL PAPER

Ultrasound-promoted novel route to triazabenzo[b]cyclopenta[lm]fluorenes: An efficient NiFe2O4@SiO2–SO3H nanocatalyst-assisted green synthesis

Soumyadip Basu

Soumyadip Basu

Department of Chemistry, University of Calcutta, Kolkata, India

Contribution: Formal analysis (lead), Methodology (lead)

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Sauvik Chatterjee

Sauvik Chatterjee

Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, India

Contribution: Data curation (supporting)

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Asim Bhaumik

Asim Bhaumik

Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, India

Contribution: Formal analysis (supporting), ​Investigation (supporting), Project administration (supporting)

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Chhanda Mukhopadhyay

Corresponding Author

Chhanda Mukhopadhyay

Department of Chemistry, University of Calcutta, Kolkata, India

Correspondence

Chhanda Mukhopadhyay, Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India.

Email: [email protected]

Contribution: Conceptualization (lead), Project administration (lead), Supervision (lead)

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First published: 14 September 2021
Citations: 3

Funding information: DST-PURSE DST Purse II, Grant/Award Number: SR/PURSE Phase 2/21(C); DST-FIST, Grant/Award Number: SR/FST/CSI-198/2008; CAS-V, Grant/Award Number: 540/3/CAS-V/2015; University Grants Commission (UGC), New Delhi

Abstract

A series of new triazabenzo[b]cyclopenta[lm]fluorene scaffolds have been synthesized from 1,2-phenylenediamines, isothiocyanates and ninhydrin via a heterogeneous and efficient NiFe2O4@SiO2–SO3H nanoparticle-catalysed, ultrasonic irradiation-assisted, eco-friendly protocol. The NiFe2O4@SiO2–SO3H nanopowder has been synthesized and thoroughly characterized by FTIR, powdered XRD, FESEM, HRTEM, EDX and N2 adsorption analysis. The most desirable agenda of our methodology is to evolve an eco-friendly green protocol with minimum reaction time and easy reaction condition. A new and efficient catalyst, broad scope in substrate variation, very high yield percentages, use of green solvent and very short reaction time are the crucial advantages of our methodology.

CONFLICT OF INTEREST

There are no conflicts to declare.

DATA AVAILABILITY STATEMENT

Research data are not shared.

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