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Jentsch NG, Hume JD, Crull EB, Beauti SM, Pham AH, Pigza JA, Kessl JJ, Donahue MG. Quinolines from the cyclocondensation of isatoic anhydride with ethyl acetoacetate: preparation of ethyl 4-hydroxy-2-methylquinoline-3-carboxylate and derivatives. Beilstein J Org Chem 2018; 14:2529-2536. [PMID: 30344776 PMCID: PMC6178280 DOI: 10.3762/bjoc.14.229] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/04/2018] [Indexed: 01/25/2023] Open
Abstract
A convenient two-step synthesis of ethyl 4-hydroxy-2-methylquinoline-3-carboxylate derivatives has been developed starting from commercially available 2-aminobenzoic acids. In step 1, the anthranilic acids are smoothly converted to isatoic anhydrides using solid triphosgene in THF. In step 2, the anhydride electrophiles are reacted with the sodium enolate of ethyl acetoacetate, generated from sodium hydroxide, in warm N,N-dimethylacetamide resulting in the formation of substituted quinolines. A degradation-build-up strategy of the ethyl ester at the 3-position allowed for the construction of the α-hydroxyacetic acid residue required for the synthesis of key arylquinolines involved in an HIV integrase project.
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Affiliation(s)
- Nicholas G Jentsch
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Jared D Hume
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Emily B Crull
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Samer M Beauti
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Amy H Pham
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Julie A Pigza
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Jacques J Kessl
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Matthew G Donahue
- Department of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
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Gao F, Wang P, Yang H, Miao Q, Ma L, Lu G. Recent developments of quinolone-based derivatives and their activities against Escherichia coli. Eur J Med Chem 2018; 157:1223-1248. [DOI: 10.1016/j.ejmech.2018.08.095] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 08/29/2018] [Accepted: 08/31/2018] [Indexed: 12/14/2022]
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Jiang D. 4-Quinolone Derivatives and Their Activities Against Gram-negative Pathogens. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3244] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Dan Jiang
- School of Nuclear Technology and Chemistry & Biology; Hubei University of Science and Technology; Xianning Hubei China
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