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Balaso Mohite S, Kousin Mirza Y, Kumar V, Partap S, Baji Baba S, Alake J, Bera M, Karpoormath R. Palladium-Catalyzed C-H Olefination of Imidazo[1,2a] pyridine Carboxamide in Aqueous Ethanol under Oxygen. Chemistry 2024; 30:e202304239. [PMID: 38317443 DOI: 10.1002/chem.202304239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/03/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
The advancement of sustainable chemistry and changes in the economy are strongly intertwined. Reaction time, cost savings, moderate temperatures, and generation of the fewest byproducts are frequently achieved by using catalytic processes. Herein, we report the C-H olefination of imidazo[1,2a] pyridine carboxamides with various acrylates in the presence of Pd (OAc)2 with O2 as the oxidant in aqueous ethanol rather than using non-ecofriendly solvents. The C-H activation features most user-friendly reaction conditions, excellent yield as well as plenty substrate scope and applicable for C-H deuteriation of the corresponding heteroarenes with D2O. Experimental mechanistic studies indicate that C-H activation step succeeded after formation of tetra coordinated square planer Pd-substrate adduct.
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Affiliation(s)
- Sachin Balaso Mohite
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Yafia Kousin Mirza
- Photocatalysis & Synthetic Methodology Lab (PSML), Amity Institute of Click Chemistry Research & Studies (AICCRS), Amity University, Noida, 201303, India
| | - Vishal Kumar
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Sangh Partap
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Shaik Baji Baba
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - John Alake
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
| | - Milan Bera
- Photocatalysis & Synthetic Methodology Lab (PSML), Amity Institute of Click Chemistry Research & Studies (AICCRS), Amity University, Noida, 201303, India
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, Discipline of Pharmaceutical Sciences, College of Health Sciences, University of KwaZulu-Natal (Westville), Durban, 4000, South Africa
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