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Hoogzand C. Isomerisation of s-triazolo [3,4-a]isoquinoline and s-triazolo[4,3-a]thieno[3,2-c]pyridine. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19710901107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wang HM, Chen LC. SYNTHESIS OF 2-ARYL[1,2,4]-TRIAZOLO[5,1-b]BENZOTHIAZOLES. ORG PREP PROCED INT 2009. [DOI: 10.1080/00304949609356546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zhou HB, Liu GS, Yao ZJ. Short and efficient total synthesis of luotonin A and 22-hydroxyacuminatine using a common cascade strategy. J Org Chem 2007; 72:6270-2. [PMID: 17608538 DOI: 10.1021/jo070837d] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Total syntheses of 22-hydroxyacuminatine and luotonin A were achieved in direct fashion and high overall yields (16% in eight steps and 47% in five steps, respectively). A mild cascade methodology was successfully applied in both syntheses as a common strategy. The new approach presents the advantages of short routes, high overall yields, use of stable intermediates, and ease of operations.
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Affiliation(s)
- Hai-Bin Zhou
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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Chen YH, Zhang YH, Zhang HJ, Liu DZ, Gu M, Li JY, Wu F, Zhu XZ, Li J, Nan FJ. Design, Synthesis, and Biological Evaluation of Isoquinoline-1,3,4-trione Derivatives as Potent Caspase-3 Inhibitors. J Med Chem 2006; 49:1613-23. [PMID: 16509578 DOI: 10.1021/jm050896o] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of isoquinoline-1,3,4-trione derivatives were identified as novel and potent inhibitors of caspase-3 through structural modification of the original compound from high-throughput screening. Various analogues (2, 6, 9, 13, and 14) were synthesized and identified as caspase inhibitors, and the introduction of a 6-N-acyl group (compound 13) greatly improved their activity. Some of them showed low nanomolar potency against caspase-3 in vitro (for example, for 6k, IC50 = 40 nM) and significant protection against apoptosis in a model cell system. Additionally, compound 13f demonstrated a dose-dependent decrease in infarct volume in the transient MCA occlusion stroke model. The present small-molecule caspase-3 inhibitor with novel structures different from structures of known caspase inhibitors revealed a new direction for therapeutic strategies directed against diseases involving abnormally up-regulated apoptosis.
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Affiliation(s)
- Yi-Hua Chen
- Chinese National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai, 201203, PRC
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Kranjc K, Stefane B, Polanc S, Kocevar M. Synthesis of Highly Substituted Aniline and o-Phenylenediamine Derivatives Containing Various Substitution Patterns. J Org Chem 2004; 69:3190-3. [PMID: 15104462 DOI: 10.1021/jo035473d] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Diels-Alder reactions of a variety of 2H-pyran-2-ones 1 with alkynes 2 yielding highly substituted aniline and o-phenylenediamine derivatives 4 with novel (and in some cases known but very rare and useful) structural patterns are presented. The effect of substituents of both reactants on the reaction rates was investigated. The reactions were carried out under thermal conditions, as well as at high pressures.
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Affiliation(s)
- Kristof Kranjc
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Slovenia
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Zienkiewicz J, Kaszynski P, Young VG. Fused-Ring Thiadiazines: Preparation and Crystallographic Characterization of 3-Phenyl Derivative of Benzo-, Pyridio[2,3-e]-, Pyrazino[2,3-e]-, and Tetrafluorobenzo-[1,2,4]thiadiazines. J Org Chem 2004; 69:2551-61. [PMID: 15049657 DOI: 10.1021/jo035835h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four bicyclic 4H-[1,2,4]thiadiazines 1a-d were prepared in 74-88% yields in two steps from the corresponding amidines 2. Three of them, 1a, 1b, and 1d, were obtained by thermal elimination of propene from the intermediate S-propylsulfilimines 12. The pyrazino derivative 1c was formed upon thermolysis of sulfoxide 14c obtained from 2c. The E(i) mechanism was investigated using DFT methods. The elimination in the sulfilimine appears to be more favorable by about 2 kcal/mol than in the analogous sulfoxide. Crystal and molecular structures of three out of the four thiadiazines were established by single-crystal X-ray analysis. All thiadiazines were found as the 4H tautomers with the heterocyclic ring puckered along the S(1)...N(4) line. The benzo derivative 1a forms a unidimensional N(4)-H...N(2) chain, the pyrazino derivative 1c forms dimeric pairs with two synergistic hydrogen bonds, and the crystal structure of 1d is characterized by strong C(6)F(4)...C(6)H(5) quadrupolar interactions.
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Affiliation(s)
- Józef Zienkiewicz
- Organic Materials Research Group, Department of Chemistry, Vanderbilt University, Box 1822 Station B, Nashville, Tennessee 37235, USA
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Gizatullina �M, Kartsev VG. Annelation of the 1,2,4-triazole ring on the basis of ?-hydrazino-substituted heterocycles and their hydrazones (review). Chem Heterocycl Compd (N Y) 1993. [DOI: 10.1007/bf00531397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Synthesis of nitrogen-bridged purine-like C-nucleosides from ethyl 2,5-anhydro-6-O-benzoyl-d-allonodithioate. Carbohydr Res 1989. [DOI: 10.1016/0008-6215(89)84093-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Molina P, Vilaplana MJ, Andreu PL, Møller J. Oxamic acid derivaties in heterocyclic synthesis: Preparation of 1,2,4-triazolo[1,5- a]pyrazine derivatives. J Heterocycl Chem 1987. [DOI: 10.1002/jhet.5570240509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Jones G, Sliskovic DR. The Chemistry of the Triazolopyridines. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 34 1983. [DOI: 10.1016/s0065-2725(08)60821-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Tserng KY, Bauer L. Degradative ring opening of pyrido and pyrazino 3-benzenesulfonyloxyuracils and their conversion to condensed pyrazolones and triazolones. J Heterocycl Chem 1974. [DOI: 10.1002/jhet.5570110210] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cheeseman G, Werstiuk E. Recent Advances in Pyazine Chemistry. ADVANCES IN HETEROCYCLIC CHEMISTRY 1972. [DOI: 10.1016/s0065-2725(08)60953-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Potts KT, Surapaneni CR. 1,2,4-Triazoles. XXV. The effect of pyridine substitution on the isomerization ofs-Triazolo[4,3-a] pyridines intos-Triazolo[1,5-a] pyridines. J Heterocycl Chem 1970. [DOI: 10.1002/jhet.5570070504] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Eicher T, Hünig S, Hansen H, Nikolaus P. Alkoxy-diazenium-Salze, IV. Reaktion mit N-Heterocyclen und Schiffschen Basen zus-Triazolium-Salzen. ACTA ACUST UNITED AC 1969. [DOI: 10.1002/cber.19691020936] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Potts KT, Schneller SW. 1,2,4-Triazoles. XX. Pyrolytic decomposition of ketone hydrazones derived from pyrid-2-ylhydrazine and related bases. Some further examples of thes-triazolo[4, 3-α]pyrazine ands-triazolo[4, 3-a]quinoxaline series. J Heterocycl Chem 1968. [DOI: 10.1002/jhet.5570050408] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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