» Articles » PMID: 37049908

Thermal Rearrangement of 5-(2-Hydroxy-6-oxocyclohexyl)-5-chromeno[2,3-]pyridines

Overview
Journal Molecules
Publisher MDPI
Specialty Biology
Date 2023 Apr 13
PMID 37049908
Authors
Affiliations
Soon will be listed here.
Abstract

Some of the most important transformations in organic chemistry are rearrangement reactions, which play a crucial role in increasing synthetic efficiency and molecular complexity. The development of synthetic strategies involving rearrangement reactions, which can accomplish synthetic goals in a very efficient manner, has been an evergreen topic in the synthetic chemistry community. Xanthenes, pyridin-2(1)-ones, and 1,6-naphthyridines have a wide range of biological activities. In this work, we propose the thermal rearrangement of 7,9-dihalogen-substituted 5-(2-hydroxy-6-oxocyclohexyl)-5-chromeno[2,3-]pyridines in DMSO. Previously unknown 5,7-dihalogenated 5-(2,3,4,9-tetrahydro-1-xanthen-9-yl)-6-oxo-1,6-dihydropyridines and 10-(3,5-dihalogen-2-hydroxyphenyl)-5,6,7,8,9,10-hexahydrobenzo[][1,6]naphthyridines were synthesized with excellent yields (90-99%). The investigation of the transformation using H-NMR monitoring made it possible to confirm the ANRORC mechanism. The structures of synthesized compounds were confirmed by 2D-NMR spectroscopy.

References
1.
Wu X, Ma Z, Feng T, Zhu C . Radical-mediated rearrangements: past, present, and future. Chem Soc Rev. 2021; 50(20):11577-11613. DOI: 10.1039/d1cs00529d. View

2.
Kumar A, Sharma S, Maurya R, Sarkar J . Diversity oriented synthesis of benzoxanthene and benzochromene libraries via one-pot, three-component reactions and their anti-proliferative activity. J Comb Chem. 2009; 12(1):20-4. DOI: 10.1021/cc900143h. View

3.
Austin N, Hadley M, Harling J, Harrington F, Macdonald G, Mitchell D . The design of 8,8-dimethyl[1,6]naphthyridines as potential anticonvulsant agents. Bioorg Med Chem Lett. 2003; 13(10):1627-9. DOI: 10.1016/s0960-894x(03)00288-9. View

4.
Shams H, Mohareb R, Helal M, Mahmoud A . Novel synthesis and antitumor evaluation of polyfunctionally substituted heterocyclic compounds derived from 2-cyano-N-(3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)-acetamide. Molecules. 2010; 16(1):52-73. PMC: 6259152. DOI: 10.3390/molecules16010052. View

5.
Maharvi G, Ali S, Riaz N, Afza N, Malik A, Ashraf M . Mild and efficient synthesis of new tetraketones as lipoxygenase inhibitors and antioxidants. J Enzyme Inhib Med Chem. 2008; 23(1):62-9. DOI: 10.1080/14756360701408754. View