Copper-catalyzed aerobic annulation of hydrazones with dienones: an efficient route to pyrazole-linked hybrid molecules

A copper-catalyzed aerobic [3 + 2] annulation reaction to access various pyrazole-bound chalcones starting from readily available and cost-effective hydrazones and dienones is reported. These pyrazole-bound chalcones were further utilized effectively to prepare a series of pyrazole-linked hybrid mol...

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Published in:Organic & biomolecular chemistry 2024-08, Vol.22 (32), p.6631-6637
Main Authors: Nayak, Kalinga H, Jijin, Robert K, Sreelekha, Mariswamy K, Babu, Beneesh P
Format: Article
Language:English
Subjects:
Atom economy
Catalysis
Chemical reactions
Copper
Hybrids
Hydrazones
Organic chemistry
Pyrazole
Pyrazoles
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container_issue 32
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creator Nayak, Kalinga H
Jijin, Robert K
Sreelekha, Mariswamy K
Babu, Beneesh P
description A copper-catalyzed aerobic [3 + 2] annulation reaction to access various pyrazole-bound chalcones starting from readily available and cost-effective hydrazones and dienones is reported. These pyrazole-bound chalcones were further utilized effectively to prepare a series of pyrazole-linked hybrid molecules, such as pyrazole-pyrazoline, pyrazole-aziridine, and pyrazole-pyridine hybrids by efficient simple transformations. Synthetically challenging hybrid molecules were obtained in a simple, two-step process with high atom economy under aerobic copper catalysis. A two-step method to synthesize functionalized pyrazole-aziridine, pyrazole-pyrazoline and pyrazole-pyridine hybrids is reported under aerobic copper catalysis using abundant and cost-effective hydrazones and dibenzylideneacetones.
doi_str_mv 10.1039/d4ob00825a
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source Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Atom economy
Catalysis
Chemical reactions
Copper
Hybrids
Hydrazones
Organic chemistry
Pyrazole
Pyrazoles
title Copper-catalyzed aerobic annulation of hydrazones with dienones: an efficient route to pyrazole-linked hybrid molecules
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