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Terrab L, Rosenker CJ, Johnstone L, Ngo LK, Zhang L, Ware NF, Miller B, Topacio AZ, Sannino S, Brodsky JL, Wipf P. Synthesis and Selective Functionalization of Thiadiazine 1,1-Dioxides with Efficacy in a Model of Huntington's Disease. ACS Med Chem Lett 2020; 11:984-990. [PMID: 32435415 DOI: 10.1021/acsmedchemlett.0c00018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 02/19/2020] [Indexed: 12/11/2022] Open
Abstract
The scope of the acid-mediated 3-component synthesis of thiadiazines was investigated. A selective functionalization of the six-membered heterocyclic core structure was accomplished by sequential alkylations, saponifications, and coupling reactions. Several new analogs of a dihydropyrimidinone Hsp70 chaperone agonist, MAL1-271, showed promising activity in a cell based model of Huntington's disease.
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Affiliation(s)
- Leila Terrab
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Christopher J. Rosenker
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Lisa Johnstone
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Linh K. Ngo
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Li Zhang
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Nathaniel F. Ware
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Bettina Miller
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Andrea Z. Topacio
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Sara Sannino
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jeffrey L. Brodsky
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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Abstract
On the basis of the cyclization reactions reported by Danishefsky et al. of Meldrum's acid hydroxylethyl and anilinoethyl derivatives, the cyclization of the sulfamidomethylene and ureidomethylene derivatives was attempted without success. To understand the lack of reactivity of these compounds versus the successful cyclization of the ethyl derivatives, the corresponding mechanisms of reaction for both processes have been explored by means of MP2/6-311+G(d,p) calculations in an aqueous environment. The conformational analysis of all of these structures revealed that, while for the ethyl derivatives the minimum energy conformation corresponds to that of the cyclization initiating structure, for the methylene analogues the entrance channel conformations are substantially less stable than the energy minimum. Intramolecular hydrogen bonds were found in all of the energy minima as well as in the cyclization initiating conformations as determined by analysis of their electron density. The potential energy surfaces for the successful and unsuccessful cyclization processes were obtained at room temperature and 100 °C. Comparison of both processes allows rationalization that the lack of reactivity of the methylene derivatives can be thermodynamically explained based not only on the strength of the intramolecular hydrogen bond formed in their energy minima but also by the energy penalty needed to reach the entrance channel conformation and by the calculated energy barriers.
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Affiliation(s)
- Cristina Trujillo
- School of Chemistry, Trinity Biomedical Sciences Institute , Trinity College Dublin , 152-160 Pearse Street , Dublin 2 , Ireland
| | - Pilar Goya
- Instituto de Química Médica, CSIC , Juan de la Cierva, 3 , E-28006 Madrid , Spain
| | - Isabel Rozas
- School of Chemistry, Trinity Biomedical Sciences Institute , Trinity College Dublin , 152-160 Pearse Street , Dublin 2 , Ireland
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Esteban AI, Juanes O, Conde S, Goya P, De Clercq E, Martínez A. New 1,2,6-thiadiazine dioxide acyclonucleosides: synthesis and antiviral evaluation. Bioorg Med Chem 1995; 3:1527-35. [PMID: 8634833 DOI: 10.1016/0968-0896(95)00140-c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
New acyclonucleosides derived from 1,2,6-thiadiazine dioxide systems have been synthesized. Lipase-mediated deacylation procedure was used to obtain the deprotected derivatives. All the newly prepared compounds were tested as antiviral agents, but none of them showed significant activity.
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Affiliation(s)
- A I Esteban
- Instituto de Química Médica (CSIC), Madrid, Spain
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Meisenheimer JL, Meisenheimer JL, Raya DG, Stapleton MC, Goddard CJ. Synthesis Of N,N′-Diaralkyl 2H-1,2,6-Tetrahydrothiadiazines. SYNTHETIC COMMUN 1989. [DOI: 10.1080/00397918908052620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | | | - Diana G. Raya
- a Department of Chemistry , Eastern Kentucky University , Richmond , KY , 40475
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5
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Heterocycles Containing the Sulfamide Moiety. ADVANCES IN HETEROCYCLIC CHEMISTRY 1988. [DOI: 10.1016/s0065-2725(08)60262-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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de la Cuesta E, Avendaño C. Synthesis of 2-substituted 4-oxo-5-nitropyrimidines from methyl 3-ethoxy-2-nitroacrylate and other reactions. J Heterocycl Chem 1985. [DOI: 10.1002/jhet.5570220222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Goya P, Lissavetzky J, Rozas I, Stud M. Fused 1,2,6-Thiadiazines Tetrahydrobenzo[b]thieno[2,3-c] [1,2,6]thiadiazine 2,2-Dioxides. Arch Pharm (Weinheim) 1984. [DOI: 10.1002/ardp.19843170909] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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