Relevant bibliographies by topics / 5-7-5 Tricyclic Ring Systems

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Academic literature on the topic '5-7-5 Tricyclic Ring Systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "5-7-5 Tricyclic Ring Systems"

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He, Jing, and Marc L. Snapper. "New cycloaddition/fragmentation strategies for preparing 5-7-5 and 5-7-6 fused tricyclic ring systems." Tetrahedron 69, no. 36 (2013): 7831–39. http://dx.doi.org/10.1016/j.tet.2013.05.129.

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Ovaska, Timo V., Jayme L. Roark, Christina M. Shoemaker, and Jon Bordner. "A convenient route to fused 5-7-6 tricyclic ring systems." Tetrahedron Letters 39, no. 32 (1998): 5705–8. http://dx.doi.org/10.1016/s0040-4039(98)01198-8.

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He, Jing, and Marc L. Snapper. "ChemInform Abstract: New Cycloaddition/Fragmentation Strategies for Preparing 5-7-5 and 5-7-6 Fused Tricyclic Ring Systems." ChemInform 45, no. 2 (2013): no. http://dx.doi.org/10.1002/chin.201402029.

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OVASKA, T. V., J. L. ROARK, C. M. SHOEMAKER, and J. BORDNER. "ChemInform Abstract: A Convenient Route to Fused 5-7-6 Tricyclic Ring Systems." ChemInform 29, no. 44 (2010): no. http://dx.doi.org/10.1002/chin.199844105.

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Fang, Xianjie, and Xiaofeng Tong. "Palladium-catalyzed cyclization of 1,6-enyne with 2-bromoarylaldehyde: domino sequence to [5-7-6] tricyclic ring systems." Tetrahedron Letters 51, no. 2 (2010): 317–20. http://dx.doi.org/10.1016/j.tetlet.2009.11.006.

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Mátyus, Péter, Luca Szalay, Endre Kasztreiner, Gyula Jerkovich, and György Rabloczky. "Synthesis of new tricyclic ring systems containing the pyrimido[5, 4-b][1, 4]oxazine skeleton." Journal of Heterocyclic Chemistry 26, no. 3 (1989): 739–40. http://dx.doi.org/10.1002/jhet.5570260341.

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Gaber, Hatem M., Mark C. Bagley, Sherif M. Sherif, and Mohsen A. Sayed. "Novel Phenylazo Derivatives of Condensed and Uncondensed Thiophene. Synthesis, Characterization, and Antimicrobial Studies." Zeitschrift für Naturforschung B 66, no. 6 (2011): 585–96. http://dx.doi.org/10.1515/znb-2011-0606.

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In the search for new therapeutic agents against microbial infections, two novel series of monocyclic and tricyclic 5-(phenylazo)thiophene systems were synthesized based on 3-amino-2-thioxopyrimidinone and 2-cyanoacetamidothiophene derivatives 4 and 6. Functionalization of the pyrimidine ring in precursor 4 resulted in the formation of the target tricyclic condensed thiophenes 7, 12, and 13a, b, by the application of a variety of addition, substitution, and condensation reactions. On the other hand, derivatization of the versatile cyanoacetylated compound 6 led to a second series of monocyclic
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Toze, Flavien A. A., Maryana A. Nadirova, Dmitriy F. Mertsalov, Julya S. Sokolova, Pavel V. Dorovatovskii, and Victor N. Khrustalev. "IMDAV reaction between phenylmaleic anhydride and thienyl(furyl)allylamines: synthesis and molecular structure of (3aSR,4RS,4aRS,7aSR)-5-oxothieno- and (3aSR,4SR,4aRS,7aSR)-5-oxofuro[2,3-f]isoindole-4-carboxylic acids." Acta Crystallographica Section E Crystallographic Communications 74, no. 10 (2018): 1400–1404. http://dx.doi.org/10.1107/s2056989018012239.

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The title compounds C24H21NO3S, I, and C24H21NO4, II, are the products of the IMDAV reaction between phenylmaleic anhydride and thienyl(furyl)allylamines. Their molecular structures comprise fused tricyclic systems containing thiophene, cyclohexene and pyrrolidine rings (I) or furan, cyclohexene and pyrrolidine rings (II). The central cyclohexene and pyrrolidine rings in both compounds adopt slightly twisted boat and envelope conformations, respectively. The dihedral angles between the basal plane of the pyrrolidine ring and the thiophene (in I) or furan (in II) ring plane are 22.74 (16) and 2
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Shafawati, M. T. Soraya, Fuyuhiko Inagaki, Takamasa Kawamura, and Chisato Mukai. "Syntheses of 6-8-5 tricyclic ring systems by carbonylative [2+2+1] cycloaddition of bis(allene)s." Tetrahedron 69, no. 5 (2013): 1509–15. http://dx.doi.org/10.1016/j.tet.2012.12.014.

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Spanò, Virginia, Marilia Barreca, Vincenzo Cilibrasi, et al. "Evaluation of Fused Pyrrolothiazole Systems as Correctors of Mutant CFTR Protein." Molecules 26, no. 5 (2021): 1275. http://dx.doi.org/10.3390/molecules26051275.

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Cystic fibrosis (CF) is a genetic disease caused by mutations that impair the function of the CFTR chloride channel. The most frequent mutation, F508del, causes misfolding and premature degradation of CFTR protein. This defect can be overcome with pharmacological agents named “correctors”. So far, at least three different classes of correctors have been identified based on the additive/synergistic effects that are obtained when compounds of different classes are combined together. The development of class 2 correctors has lagged behind that of compounds belonging to the other classes. It was s
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Dissertations / Theses on the topic "5-7-5 Tricyclic Ring Systems"

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He, Jing. "Intramolecular Cycloaddition of Cyclobutadiene: Applications toward Functionalized 5-7-5 Tricyclic Ring Systems and Guaiane Natural Products." Thesis, Boston College, 2012. http://hdl.handle.net/2345/2923.

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Thesis advisor: Marc L. Snapper<br>Intramolecular cycloadditions of cyclobutadiene provide rapid access to rigid polycyclic systems with high strain energies and unique molecular geometries. Further functionalization of these systems followed by strain-release fragmentation provides great opportunities to construct fused-medium-ring architecture, which are very common in natural products but challenging to achieve efficiently. An intermolecular cyclopropanation/acid-mediated rearrangement strategy has been previously developed to access the 5-7 bicyclic ring systems in a highly stereospecific
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Book chapters on the topic "5-7-5 Tricyclic Ring Systems"

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Taber, Douglass F. "Alkaloid Synthesis: (–)-α-Kainic Acid (Cohen), Hyacinthacine A2 (Fox), (–)-Agelastatin A (Hamada), (+)-Luciduline (Barbe), (+)-Lunarine (Fan), (–)-Runanine (Herzon)." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0058.

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The intramolecular ene cyclization is still little used in organic synthesis. Theodore Cohen of the University of Pittsburgh trapped (J. Org. Chem. 2011, 76, 7912) the cyclization product from 1 with iodine to give 2, setting the stage for an enantiospecific total synthesis of (–)-α-kainic acid 3. Intramolecular alkene hydroamination has been effected with transition metal catalysts. Joseph M. Fox of the University of Delaware isomerized (Chem. Sci. 2011, 2, 2162) 4 to the trans cyclooctene 5 with high diastereocontrol. Deprotection of the amine led to spontaneous cyclization, again with high diastereocontrol to hyacinthacine A2 6. Yasumasa Hamada of Chiba University devised (Org. Lett. 2011, 13, 5744) a catalyst system for the enantioselective aziridination of cyclopentenone 7. The product 8 was carried on to the tricyclic alkaloid (–)-agelastatin A 9. Guillaume Barbe, now at Novartis in Cambridge, MA, effected (J. Org. Chem. 2011, 76, 5354) the enantioselective Diels-Alder cycloaddition of acrolein 11 to the dihydropyridine 10. Ring-opening ring-closing metathesis later formed one of the carbocyclic rings of (+)-luciduline 13, and set the stage for an intramolecular aldol condensation to form the other. Chun-An Fan of Lanzhou University employed (Angew. Chem. Int. Ed. 2011, 50, 8161) a Cinchona-derived catalyst for the enantioselective Michael addition to prepare 14. Although 14 and 15 were only prepared in 77% ee, crystallization to remove the racemic component of a later intermediate led to (+)-lunarine 16 in high ee. Seth B. Herzon of Yale University used (Angew. Chem. Int. Ed. 2011, 50, 8863) the enantioselective Diels-Alder addition with 18 to block one face of the quinone 17. Reduction of 19 followed by methylation delivered an iminium salt, only one face of which was open for the addition of an aryl acetylide. Thermolysis to remove the cyclopentadiene gave an intermediate that was carried on to (+)-runanine 20.
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Taber, Douglass F. "Diels–Alder Cycloaddition: Pancratistatin (Cho), Nootkatone (Reddy), Platensimycin (Zhang/Lee), Scabronine G (Nakada), Isoglaziovianol (Trauner)." In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0077.

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Samuel J. Danishefsky of Columbia University and the Memorial Sloan-Kettering Cancer Center made (Proc. Natl. Acad. Sci. 2013, 110, 10904) the unexpected obser­vation that methylation of the enolate derived from conjugate addition to the readily-prepared 1 followed by intramolecular alkene metathesis led to the trans fused ketone 2. This can be contrasted to the diastereo- and regioisomer 3, the product from Diels-Alder cycloaddition of 2-methylcyclohexenone to isoprene. The trans ring fusion of 2 is particularly significant because ozonolysis followed by aldol condensation would deliver the angularly-methylated trans-fused 6/5 C–D ring system of the steroids and related natural products. Cheon-Gyu Cho of Hanyang University added (Org. Lett. 2013, 15, 5806) the activated dienophile 4 to the dienyl lactone to give, after oxidation, the dibro­mide 5. Debromination followed by oxidation led to the antineoplastic lactam pancratistatin 6. D. Srinivasa Reddy of CSIR-National Chemical Laboratory Pune devised (J. Org. Chem. 2013, 78, 8149) a cascade protocol of Diels-Alder cycloaddition of 8 to the diene 7, followed by intramolecular aldol condensation, to give the enone 9. Oxidative manipulation followed by methylenation completed the synthesis of the commercially important grapefruit flavor nootkatone 10. Xinhao Zhang and Chi-Sing Lee of the Peking University Shenzen Graduate School uncovered (J. Org. Chem. 2013, 78, 7912) another cascade transformation, intermolecular addition of 11 to 12 followed by intramolecular Conia-ene cyclization, to give the tricyclic 13. Further manipulation led to an established intermediate for the total synthesis of platensimycin 14. Masahisa Nakada of Waseda University prepared (Angew. Chem. Int. Ed. 2013, 52, 7569) the enantiomerically-pure allene 15. Oxidation of the phenol to the monoketal of the cyclohexadienone set the stage for intramolecular cycloaddition to give 16. Oxidative cleavage followed by intramolecular alkene metathesis led to (+)-scabronine G 17. Dirk Trauner of the University of Munich assembled (Org. Lett. 2013, 15, 4324) the enantiomerically-pure alcohol 18. Oxidation gave the quinone, leading to intra­molecular Diels–Alder cycloaddition. The free alcohol then added to the exocyclic alkene of that product, to give, after further oxidation, the ether 19. Deprotection fol­lowed by reduction then completed the synthesis of (−)-isoglaziovianol 20.
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"Fused 5/7 and Larger Ring Systems." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470186749.ch5.

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Hilt, G., W. Hess, and C. Hengst. "Bicyclic 5-5 Systems with One Bridgehead (Ring Junction) Nitrogen Atom: Four Extra Heteroatoms 3:1." In Comprehensive Heterocyclic Chemistry III. Elsevier, 2008. http://dx.doi.org/10.1016/b978-008044992-0.01008-7.

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Norsikian, Stéphanie. "Bicyclic 5-5 Systems With One Bridgehead (Ring Junction) Nitrogen Atom: Four Extra 1-Heteroatoms 3:1 (2007–2018)." In Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-818655-8.00031-7.

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Jones, Gurnos. "Bicyclic 5-6 Systems with One Ring Junction Nitrogen Atom: One Extra Heteroatom 0:1." In Comprehensive Heterocyclic Chemistry II. Elsevier, 1996. http://dx.doi.org/10.1016/b978-008096518-5.00178-7.

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Sliskovic, Drago R. "Bicyclic 5-6 Systems with One Ring Junction Nitrogen Atom: Two Extra Heteroatoms 0:2." In Comprehensive Heterocyclic Chemistry II. Elsevier, 1996. http://dx.doi.org/10.1016/b978-008096518-5.00181-7.

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Punna, Nagender, Surender Singh Jadav, Andhavaram Ramaraju, Ramachandra Reddy Donthiri, and Chada Raji Reddy. "Bicyclic 5–6 systems with one bridgehead (ring junction) nitrogen atom: One extra heteroatom." In Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-818655-8.00148-7.

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Taddei, M. "Bicyclic 5-6 Systems with One Bridgehead (Ring Junction) Nitrogen Atom: One Extra Heteroatom 0:1." In Comprehensive Heterocyclic Chemistry III. Elsevier, 2008. http://dx.doi.org/10.1016/b978-008044992-0.01011-7.

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Lambert, Tristan H. "C–O Ring Formation." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0049.

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A reductive radical cyclization of tetrahydropyran 1 to form bicycle 2 using iron(II) chloride in the presence of NaBH4 was reported (Angew. Chem. Int. Ed. 2012, 51, 6942) by Louis Fensterbank and Cyril Ollivier at the University of Paris and Anny Jutand at the Ecole Normale Supérieure. The enantioselective conversion of tetrahydrofuran 3 to spirocycle 5 via iminium ion-catalyzed hydride transfer/cyclization was developed (Angew. Chem. Int. Ed. 2012, 51, 8811) by Yong-Qiang Tu at Lanzhou University. Daniel Romo at Texas A&amp;M University showed (J. Am. Chem. Soc. 2012, 134, 13348) that enantioenriched tricyclic β-lactone 8 could be readily prepared via dyotropic rearrangement of the diketoacid 6 under catalysis by chiral Lewis base 7. A dyotropic rearrangement was also utilized (Angew. Chem. Int. Ed. 2012, 51, 6984) by Zhen Yang at Peking University, Tuoping Luo at H3 Biomedicine in Cambridge, MA, and Yefeng Tang at Tsinghua University for the conversion of 9 to the bicyclic lactone 10. In terms of the enantioselective synthesis of β-lactones, Karl Scheidt at Northwestern University found that NHC catalyst 12 effects (Angew. Chem. Int. Ed. 2012, 51, 7309) the dynamic kinetic resolution of aldehyde 11 to furnish the lactone 13 with very high ee. Meanwhile, Xiaomeng Feng at Sichuan University has developed (J. Am Chem. Soc. 2012, 134, 17023) a rare example of an enantioselective Baeyer-Villiger oxidation of 4-alkyl cyclohexanones such as 14. The diastereoselective preparation of tetrahydropyran 18 by Lewis acid-promoted cyclization of cyclopropane 17 was accomplished (Org. Lett. 2012, 14, 6258) by Jin Kun Cha at Wayne State University. Stephen J. Connon at the University of Dublin reported (Chem. Commun. 2012, 48, 6502) the formal cycloaddition of aryl succinic anhydrides such as 18 with aldehydes to produce γ-butyrolactones, including 20, in high ee. The stereodivergent cyclization of 21 via desilylation-induced heteroconjugate addition to produce the complex tetrahydropyran 22 was discovered (Org. Lett. 2012, 14, 5550) by Paul A. Clarke at the University of York. Remarkably, while TFA produced a 13:1 diastereomeric ratio in favor of the cis diastereomer 22, the use of TBAF resulted in complete reversal of diastereoselectivity.
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Conference papers on the topic "5-7-5 Tricyclic Ring Systems"

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Muñoz, David. "New strategies in proprioception’s analysis for newer theories about sensorimotor control." In Systems & Design 2017. Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/sd2017.2017.6903.

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Abstract Human’s motion and its mechanisms had become interesting in the last years, where the medecine’s field search for rehabilitation methods for handicapped persons. Other fields, like sport sciences, professional or military world, search to distinguish profiles and ways to train them with specific purposes. Besides, recent findings in neuroscience try to describe these mechanisms from an organic point of view. Until now, different researchs had given a model about control motor that describes how the union between the senses’s information allows adaptable movements. One of this sense is
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