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Stepanova VA, Guerrero A, Schull C, Christensen J, Trudeau C, Cook J, Wolmutt K, Blochwitz J, Ismail A, West JK, Wheaton AM, Guzei IA, Yao B, Kubatova A. Hybrid Synthetic and Computational Study of an Optimized, Solvent-Free Approach to Curcuminoids. ACS OMEGA 2022; 7:7257-7277. [PMID: 35252716 PMCID: PMC8892666 DOI: 10.1021/acsomega.1c07006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
A green and optimized protocol has been developed for the preparation of symmetric 1,7-bis(aryl)-1,6-heptadiene-3,5-diones and asymmetric 2-aryl-6-arylidenecyclohexanones with modified substrate scope and good functional group tolerance. Syntheses proceed smoothly under solvent-free conditions, providing moderate to excellent product yields with a minimal workup procedure. Control experiments, spectroscopic, and computational studies support a mechanism involving the boron-assisted in situ generation of imine intermediates. Crystal structures of three curcuminoids and isolated mechanistic intermediates are reported. The data provide insight for the further development of solvent-free protocols toward diverse curcumin derivatives in the fields of pharmaceutical and synthetic chemistries.
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Affiliation(s)
- Valeria A. Stepanova
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Andres Guerrero
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Cullen Schull
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Joshua Christensen
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Claire Trudeau
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Joshua Cook
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Kyle Wolmutt
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Jordan Blochwitz
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Abdelrahman Ismail
- Department
of Chemistry and Biochemistry, University
of Wisconsin La Crosse, 1725 State Street, La Crosse, Wisconsin 54601, United States
| | - Joseph K. West
- Department
of Chemistry, Winona State University, 175 West Mark Street, Winona, Minnesota 55987, United States
| | - Amelia M. Wheaton
- Department
of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Ilia A. Guzei
- Department
of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Bin Yao
- Department
of Chemistry, University of North Dakota, 151 Cornell Street, Grand Forks, North Dakota 58202, United States
| | - Alena Kubatova
- Department
of Chemistry, University of North Dakota, 151 Cornell Street, Grand Forks, North Dakota 58202, United States
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