Ligand-free access to benzisothiazolones and benzisoselenazolones through NiFe<sub>2</sub>O<sub>4</sub> catalyzed concomitant annulation of 2-halobenzanilides with chalcogens and their late-stage transformations

Dhara, Samiran; Saha, Moumita; Das, Asish R.

doi:10.1039/d2nj04326b

New J. Chem.

2022

DOI: 10.1039/d2nj04326b

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Ligand-free access to benzisothiazolones and benzisoselenazolones through NiFe₂O₄ catalyzed concomitant annulation of 2-halobenzanilides with chalcogens and their late-stage transformations

Samiran Dhara

Moumita Saha

Asish R. Das

Abstract: A practical non-hazardous one-pot protocol for the synthesis of benzisothiazolones and benzisoselenazolones, involving magnetically retrievable nano-nickel ferrite catalyzed tandem annulation between 2-halobenzanilides and elemental S8 or Se.

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Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units

Ghosh,

Das,

Mandal

et al. 2024

J. Org. Chem.

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A metal-free approach for synthesizing hybrid quinoxaline derivatives from sulfoxonium ylide and a 1,5-bisnucleophilic N-heterocycle mediated by elemental sulfur is presented to illuminate the [5+1] cascade cyclization sequence. Largescale synthesis and postsynthetic functionalizations for the annulative π-extension and intramolecular aza-annulation reactions reveal the potential utility and actualize the fabricated approach.

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Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units

Ghosh,

Das,

Mandal

et al. 2024

J. Org. Chem.

View full text Add to dashboard Cite

show abstract

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Ligand-free access to benzisothiazolones and benzisoselenazolones through NiFe₂O₄ catalyzed concomitant annulation of 2-halobenzanilides with chalcogens and their late-stage transformations

Abstract: A practical non-hazardous one-pot protocol for the synthesis of benzisothiazolones and benzisoselenazolones, involving magnetically retrievable nano-nickel ferrite catalyzed tandem annulation between 2-halobenzanilides and elemental S8 or Se.

Cited by 1 publication

References 69 publications

Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units

Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units

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Ligand-free access to benzisothiazolones and benzisoselenazolones through NiFe2O4 catalyzed concomitant annulation of 2-halobenzanilides with chalcogens and their late-stage transformations

Abstract: A practical non-hazardous one-pot protocol for the synthesis of benzisothiazolones and benzisoselenazolones, involving magnetically retrievable nano-nickel ferrite catalyzed tandem annulation between 2-halobenzanilides and elemental S8 or Se.

Cited by 1 publication

References 69 publications

Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units

Pragmatic Access to Hybrid Quinoxaline Scaffold Mediated by Elemental Sulfur Enabling Actualization to π-Extended and Aza-Annulated Heterocyclic Units

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Ligand-free access to benzisothiazolones and benzisoselenazolones through NiFe₂O₄ catalyzed concomitant annulation of 2-halobenzanilides with chalcogens and their late-stage transformations