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Journal articles on the topic 'Tropane ring'

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Published: 5 June 2025

Last updated: 2 August 2025

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1

Kluza, Anna, Zuzanna Wojdyla, Beata Mrugala та ін. "Regioselectivity of hyoscyamine 6β-hydroxylase-catalysed hydroxylation as revealed by high-resolution structural information and QM/MM calculations". Dalton Transactions 49, № 14 (2020): 4454–69. http://dx.doi.org/10.1039/d0dt00302f.

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2

Martin, Stephen F. "Ring-closing metathesis: A facile construct for alkaloid synthesis." Pure and Applied Chemistry 77, no. 7 (2005): 1207–12. http://dx.doi.org/10.1351/pac200577071207.

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Ring-closing metathesis has been found to be a highly effective reaction for the synthesis of functionalized, bridged nitrogen heterocycles. The utility of the process has been established in several case studies, including a facile synthesis of the tropane ring system and efficient, enantioselective syntheses of the natural products (–)-peduncularine and (+)-anatoxin-a.

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3

Duran-Patron, Rosa, David O’Hagan, John T. G. Hamilton, and Chi W. Wong. "Biosynthetic studies on the tropane ring system of the tropane alkaloids from Datura stramonium." Phytochemistry 53, no. 7 (2000): 777–84. http://dx.doi.org/10.1016/s0031-9422(00)00022-4.

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4

Turgunov, Kambarali Kuchkarovich, Dilfuza Kadirova, Rasul Okmanov, Salima Fazilovna Aripova, and Bakhodir Tashkhodjaev. "Stereochemistry of tropane alkaloid of convolvine and their derivatives." European Journal of Chemistry 10, no. 4 (2019): 376–80. http://dx.doi.org/10.5155/eurjchem.10.4.376-380.1909.

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Structures of alkaloid convolvine (1) isolated from Convolvulus subhirsutus and its derivatives-convolamine(N-methylconvolvine) (2) and hydrochloride of N-benzylconvolvine (3) have been determined by single crystal X-ray diffraction technique. Compounds were crystallized in monoclinic space groups having four molecules in unit cell. All compounds contain a bicyclic ring system of tropane, where piperidine rings in all case adopt chair conformation. Hydrogen atom and methyl- and benzyl-substituents located in nitrogen atom of studied compounds occupy equatorial positions. The substituent of tro

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5

Griffith, Daniel R., and Aaron H. Shoemaker. "Synthetic Approaches to Non-Tropane, Bridged, Azapolycyclic Ring Systems Containing Seven-Membered Carbocycles." Synthesis 53, no. 01 (2020): 65–78. http://dx.doi.org/10.1055/s-0040-1707385.

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AbstractThis Short Review highlights various synthetic approaches to bridged azabicyclic ring systems containing seven-membered carbocyclic rings. Such ring systems are common to a number of biologically active natural products. The seven-membered ring in such systems is generally formed in one of four ways: 1) cyclization of an acyclic precursor; 2) ring expansion or rearrangement of a different ring size; 3) cycloaddition; and 4) use of a synthetic building block with the seven-membered ring already present. Representative examples of each approach from both total synthesis and methodologica

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6

Nocquet, Pierre-Antoine, and Till Opatz. "Total Synthesis of (±)-Scopolamine: Challenges of the Tropane Ring." European Journal of Organic Chemistry 2016, no. 6 (2016): 1156–64. http://dx.doi.org/10.1002/ejoc.201501430.

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7

Majewski, Marek, Ryszard Lazny, and Agnieszka Ulaczyk. "Enantioselective ring opening of tropinone. A new entry into tropane alkaloids." Canadian Journal of Chemistry 75, no. 6 (1997): 754–61. http://dx.doi.org/10.1139/v97-091.

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The lithium enolate of tropinone reacts with alkyl chloroformates to give 6-N-carboalkoxy-N-methyl-2-cycloheptenones (4). These compounds can be produced enantioselectively, in up to 95% ee, if chiral lithium amides (derived from optically pure amines 5–7) are used for deprotonation of tropinone in the presence of additives. The effect of additives such as LiCl, LiBr, LiF, LiClO4, CeCl3, ZnCl2, LiOH, TMEDA, HMPA, and DMPU on enantioselectivity of this deprotonation–ring opening sequence varies from slight to very large depending on the chiral amide – additive combination. Especially large incr

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8

Kohnen-Johannsen, Kathrin, and Oliver Kayser. "Tropane Alkaloids: Chemistry, Pharmacology, Biosynthesis and Production." Molecules 24, no. 4 (2019): 796. http://dx.doi.org/10.3390/molecules24040796.

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Tropane alkaloids (TA) are valuable secondary plant metabolites which are mostly found in high concentrations in the Solanaceae and Erythroxylaceae families. The TAs, which are characterized by their unique bicyclic tropane ring system, can be divided into three major groups: hyoscyamine and scopolamine, cocaine and calystegines. Although all TAs have the same basic structure, they differ immensely in their biological, chemical and pharmacological properties. Scopolamine, also known as hyoscine, has the largest legitimate market as a pharmacological agent due to its treatment of nausea, vomiti

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9

Keverline-Frantz, Kathryn I., John W. Boja, Michael J. Kuhar, et al. "Synthesis and Ligand Binding of Tropane Ring Analogues of Paroxetine." Journal of Medicinal Chemistry 48, no. 1 (2005): 336. http://dx.doi.org/10.1021/jm040189f.

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10

Keverline-Frantz, Kathryn I., John W. Boja, Michael J. Kuhar, et al. "Synthesis and Ligand Binding of Tropane Ring Analogues of Paroxetine." Journal of Medicinal Chemistry 41, no. 2 (1998): 247–57. http://dx.doi.org/10.1021/jm970669p.

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11

FORSYTHE, KELSEY M., DANIEL H. ROBERTSON, and QI-HUANG ZHENG. "AB INITIO MO CALCULATION STUDIES FOR SEVERAL NOVEL ENTRIES TO TROPANE COMPOUNDS." Journal of Theoretical and Computational Chemistry 03, no. 03 (2004): 305–23. http://dx.doi.org/10.1142/s0219633604001069.

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Tropane alkaloids are generally known as anticholinergics. Radiolabeled tropane compounds could be brain imaging agents used in biomedical imaging technique positron emission tomography (PET). A novel entry to aryltropane analogs of cocaine was developed based on the conjugate addition reaction of Grignard reagents phenylmagnesium (10), (4'-isopropenylphenyl)magnesium (11), or 2-naphthylmagnesium bromide (12) to α,β-unsaturated esters anhydroecgonine methyl ester (9) or t-butyl ester (13) which gave several aryltropanes (1–8) with high binding affinities for dopamine and serotonin transporters

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12

Brock, E. Anne, Stephen G. Davies, James A. Lee, Paul M. Roberts, and James E. Thomson. "Asymmetric Synthesis of the Tropane Alkaloid (+)-Pseudococaine via Ring-Closing Iodoamination." Organic Letters 14, no. 16 (2012): 4278–81. http://dx.doi.org/10.1021/ol3020607.

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13

Shivanyuk, Alexander, Andrii Gerasov, Rodion Boiko, et al. "Tropane-Based Dispirocyclic Oxiranes and Spirocyclic Ketones." Synthesis 54, no. 03 (2021): 723–31. http://dx.doi.org/10.1055/s-0040-1719848.

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AbstractThe Prilezhaev epoxidation of N-Boc-protected 3-cyclobutylidenetropane 1a affords a 1:2 mixture of compounds 2a and 2b, in which tropane and cyclobutane fragments are spiro-connected to the oxirane ring in endo- and exo-fashion, respectively. The exo-isomer 2b is obtained in 89% yield and 97% selectivity via the dioxirane oxidation of 1a. BF3-catalyzed isomerization of exo-oxirane 2b results in a 1:1 mixture of the spirocyclic ketones endo 3a and exo 3b containing spiro-connected tropane and cyclopentanone rings, while endo-epoxide 2a gives exclusively endo-ketone 3a. Prilezhaev and di

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14

Hoepping, Alexander, Clifford George, Judith Flippen-Anderson, and Alan P. Kozikowski. "Radical cyclization strategies for the formation of ring constrained tricyclic tropane analogues." Tetrahedron Letters 41, no. 39 (2000): 7427–32. http://dx.doi.org/10.1016/s0040-4039(00)01288-0.

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15

MAJEWSKI, M., R. LAZNY, and A. ULACZYK. "ChemInform Abstract: Enantioselective Ring Opening of Tropinone. A New Entry into Tropane Alkaloids." ChemInform 28, no. 52 (2010): no. http://dx.doi.org/10.1002/chin.199752238.

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16

Hoepping, Alexander, Clifford George, Judith Flippen-Anderson, and Alan P. Kozikowski. "ChemInform Abstract: Radical Cyclization Strategies for the Formation of Ring Constrained Tricyclic Tropane Analogues." ChemInform 31, no. 52 (2000): no. http://dx.doi.org/10.1002/chin.200052187.

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17

Davis, James H., and Jeffry D. Madura. "Synthesis and computational evaluation of a boronium ion analogue of the tropane ring system." Tetrahedron Letters 37, no. 16 (1996): 2729–30. http://dx.doi.org/10.1016/0040-4039(96)00372-3.

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18

Sharma, Aryantika, Navneet Sharma, Shikha Atteri, Geeta Yadav, and Hardesh Yadav. "Effectiveness of cycloplegic and non-cycloplegic drug agents in amblyopia treatment: A comprehensive review." INDIAN JOURNAL OF HETEROCYCLIC CHEMISTRY 35, no. 02 (2025): 417. https://doi.org/10.59467/ijhc.2025.35.417.

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Cycloplegic medications, including atropine, are frequently used to treat amblyopia, a primary cause of visual impairment in children. These medications function by paralyzing accommodation, enabling precise measurement of refractive errors. Non-cycloplegic dilators, which cause pupil dilatation without compromising accommodation, are gaining popularity, nevertheless. These substitutes might provide better patient comfort and fewer adverse effects. Since the pharmacological efficacy of both medications is determined by their molecular structures, particularly their heterocyclic rings, heterocy

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19

Newman, Amy Hauck, Sari Izenwasser, Michael J. Robarge та Richard H. Kline. "CoMFA Study of Novel Phenyl Ring-Substituted 3α-(Diphenylmethoxy)tropane Analogues at the Dopamine Transporter". Journal of Medicinal Chemistry 42, № 18 (1999): 3502–9. http://dx.doi.org/10.1021/jm980701v.

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20

Aggarwal, Varinder K., Christopher J. Astle, and Mark Rogers-Evans. "A Concise Asymmetric Route to the Bridged Bicyclic Tropane Alkaloid Ferruginine Using Enyne Ring-Closing Metathesis." Organic Letters 6, no. 9 (2004): 1469–71. http://dx.doi.org/10.1021/ol049665m.

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21

Huang, Su-Yu, Zong Chang, Shi-Chuan Tuo, Long-Hui Gao, Ai-E. Wang, and Pei-Qiang Huang. "Versatile construction of functionalized tropane ring systems based on lactam activation: enantioselective synthesis of (+)-pervilleine B." Chemical Communications 49, no. 63 (2013): 7088. http://dx.doi.org/10.1039/c3cc43665a.

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22

Manier, Sascha K., Paula Mumber, Josef Zapp, Niels Eckstein, and Markus R. Meyer. "Characterization and Metabolism of Drug Products Containing the Cocaine-Like New Psychoactive Substances Indatraline and Troparil." Metabolites 14, no. 6 (2024): 342. http://dx.doi.org/10.3390/metabo14060342.

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With a rising demand of cocaine over the last years, it is likely that unregulated new psychoactive substances with similar effects such as indatraline ((1R,3S)-3-(3,4-dichlorophenyl)-N-methyl-2,3-dihydro-1H-inden-1-amine) and troparil (Methyl (1R,2S,3S,5S)-8-methyl-3-phenyl-8-azabicyclo[3.2.1]octane-2-carboxylate) become popular as well. Both substances share a similar pharmacological profile as cocaine, while their potency is higher, and their duration of action is longer. This study investigated their metabolic fate in rat urine and incubations using pooled human liver S9 fraction (pHLS9).

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23

Huang, Su-Yu, Zong Chang, Shi-Chuan Tuo, Long-Hui Gao, Ai-E. Wang, and Pei-Qiang Huang. "ChemInform Abstract: Versatile Construction of Functionalized Tropane Ring Systems Based on Lactam Activation: Enantioselective Synthesis of (+)-Pervilleine B (I)." ChemInform 44, no. 48 (2013): no. http://dx.doi.org/10.1002/chin.201348201.

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24

Kamarul, Zaman Munirah Adibah, and Azzeme Azzreena Mohamad. "Plant toxins: alkaloids and their toxicities." GSC Biological and Pharmaceutical Sciences 6, no. 2 (2019): 021–29. https://doi.org/10.5281/zenodo.4303843.

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Since ancient civilization, plants have been utilized in many aspects of life, especially in medicinal purposes due to the presence of distinctive secondary metabolites like alkaloids, phenolics and terpenoids. Among them, alkaloids represent a large group of secondary metabolites that have basic properties and comprise nitrogen atom within the heterocyclic ring. Plant synthesizes alkaloids to maintain their survivability under unfavorable conditions. Over 3000 years, indigenous people have been used alkaloid-containing plant extracts to treat several ailments such as fever, snakebite and insa

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25

Rodriguez, Sandra, Uxue Uria, Efraim Reyes, et al. "The Pseudotransannular Ring Opening of 1‐Aminocyclohept‐4‐ene‐derived Epoxides in the Synthesis of Tropane Alkaloids: Total Synthesis of (±)‐Ferrugine." European Journal of Organic Chemistry 2021, no. 20 (2021): 2855–61. http://dx.doi.org/10.1002/ejoc.202100332.

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26

Runyon, Scott P., Jason P. Burgess, Philip Abraham, et al. "Synthesis, structural identification, and ligand binding of tropane ring analogs of paroxetine and an unexpected aza-bicyclo[3.2.2]nonane rearrangement product." Bioorganic & Medicinal Chemistry 13, no. 7 (2005): 2439–49. http://dx.doi.org/10.1016/j.bmc.2005.01.046.

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27

Nico Speckamp, W., Peter M. Esch, Henk Hiemstra, and Wim J. Klaver. "An N-Acyliminium Route to the 8-Azabicyclo[3.2.1]octane (Tropane) and the 9-Azabicyclo[4.2.1]nonane Ring System Synthesis of (±)-Anatoxin-A." HETEROCYCLES 26, no. 1 (1987): 75. http://dx.doi.org/10.3987/r-1987-01-0075.

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28

Mukhtorov, Loik G., Evgenia V. Ivanova, Maria B. Nikishina, et al. "Synthesis and structure of new derivatives of 2-chloro-N-(3-R-1,5-dinitro-8-oxo-3-azabicyclo[3.3.1]non-6-en-7-yl)acetamides." Butlerov Communications 57, no. 3 (2019): 83–88. http://dx.doi.org/10.37952/roi-jbc-01/19-57-3-83.

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The production of new 3-azabicyclononane derivatives is an important trend in the synthesis of organic compounds. It is known that 3-azabicyclononane is a key pharmacophore of a number of plant alkaloids that are widely used in medicine (aconitin, quinidine, tropane, cocaine, garnet, etc.). Among synthetic heterocycles containing a 3-azabicyclo[3.3.1]nonane fragment, compounds with various types of biological activity were found: analgesic and anti-inflammatory, antimicrobial and fungicidal, anti-cancer, antioxidant, etc. We synthesized a number of new derivatives of 3-azabicyclo[3.3. 1]nonane

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29

Rogers, Daniel H., Barbara Frey, Francis S. Roden, Friedrich-Wilhelm Russkamp, Anthony C. Willis, and Lewis N. Mander. "Exploratory Studies on the Synthesis of the Unusual Diterpenoid Tropone Harringtonolide." Australian Journal of Chemistry 52, no. 11 (1999): 1093. http://dx.doi.org/10.1071/ch99093.

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Various approaches to the total synthesis of the unusual diterpenoid tropone (2), discovered in the yew species Cephalotaxus harringtonia and C. hainanensis, are described. The rhodium-catalysed intramolecular cyclopropanation reaction of an aryl ring by means of the transition metal catalysed reaction of a diazoacetyl function was used to assemble the 5/7 ring system and to provide a cycloheptatrienyl precursor to the tropone moiety, e.g.(28)→(29) and (38) →(39). In the most promising approach, the carbocyclic system was assembled by means of the aldol reaction (42) →(43) with the newly forme

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30

Du, Yingying, Bin Huang, Jiajun Zeng, and Mingzhong Cai. "Recyclable heterogeneous gold(i)-catalyzed oxidative ring expansion of alkynyl quinols: a practical access to tropone and its analogues." Dalton Transactions 50, no. 19 (2021): 6488–99. http://dx.doi.org/10.1039/d1dt00988e.

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31

Sims, CG, and D. Wege. "Cyclopropa-Fusion to Seven-Membered Unsaturated Rings. The Synthesis of 4-Bromo-8,8-dimethylbicyclo[5.1.0]octa-1,4,6-trien-3-one, a Cyclopropa-Fused Tropone." Australian Journal of Chemistry 48, no. 3 (1995): 469. http://dx.doi.org/10.1071/ch9950469.

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This paper addresses the problem of preparing novel species such as the cyclopropa -fused tropylium ion and cyclopropa -fused tropones and tropolones. Addition of dibromocarbene and dichlorocarbene to the adduct (21) derived from dimethyl 3,3-dimethylcyclopropene-1,2- dicarboxylate and buta-1,3-diene yields the anti-tricyclo [5.1.0.03,5] octyl derivatives (22) and (23) which after hydrolysis and halodecarboxylation were transformed into (1α,3β,5β,7α)- 1,4,4,7-tetrabromo-8,8-dimethyltricyclo[5.1.0.03,5]octane (26), (1α,3β,5β,7a)-1,7-dibromo-4,4- dichloro-8,8-dimethyltricyclo 1.0.03,5]octane (27

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32

Frey, Barbara, Adam P. Wells, Frances Roden, et al. "Total Synthesis of the Pentacyclic Diterpenoid Tropone Hainanolidol." Australian Journal of Chemistry 53, no. 10 (2000): 819. http://dx.doi.org/10.1071/ch00124.

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The total synthesis of the unusual diterpenoid tropone, hainanolidol (1), discovered in the bark of the yew species, Cephalotaxus hainanensis, has been completed in 26 steps from 3,5-dimethylanisole. The intramolecular cyclopropanation reaction of the aryl ring in (30) by means of the rhodium mandelate-catalysed reaction of the diazoacetyl function was used to assemble the 5/7 ring system of (31), at the same time elaborating a cycloheptatriene moiety that could be transformed subsequently to the tropone functionality in the target molecule. While removing the acetal protecting group from (31)

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33

Nishioka, Naomi, Koji Takagi, Takatoshi Kinoshita, Hideo Kunisada та Yasuo Yuki. "Tropone-containing π-conjugated polymers: Annulation of tropone onto benzene ring in the conjugated polymer". Journal of Polymer Science Part A: Polymer Chemistry 42, № 5 (2004): 1208–15. http://dx.doi.org/10.1002/pola.11080.

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34

Toplak, Marina, Lars Höing, and Robin Teufel. "Ungewöhnliche Flavoenzyme steuern die Bildung von Troponen in Bakterien." BIOspektrum 28, no. 4 (2022): 394–96. http://dx.doi.org/10.1007/s12268-022-1770-1.

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AbstractBacterial tropone natural products play important roles in symbiotic interactions, e. g., as protective antibiotics or toxins. Remarkably, their biosynthesis relies on an interweaving of primary and secondary metabolism. Accordingly, the sequestration of a shunt product from aromatic catabolism by a non-canonical flavoenzyme leads to an advanced biosynthetic intermediate. The enzyme hereby operates as a novel dioxygenase that activates O2 for CoA thioester bond cleavage and ring epoxidation.

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35

Shoemaker, Aaron H., Elizabeth A. Foker, Elena P. Uttaro, Sarah K. Beitel, and Daniel R. Griffith. "Synthesis of 7-azabicyclo[4.3.1]decane ring systems from tricarbonyl(tropone)iron via intramolecular Heck reactions." Beilstein Journal of Organic Chemistry 19 (October 23, 2023): 1615–19. http://dx.doi.org/10.3762/bjoc.19.118.

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The 7-azabicyclo[4.3.1]decane ring system, common to a number of biologically active alkaloids, was accessed from tropone (via its η4-diene complex with Fe(CO)3) in a short sequence of steps: 1) nucleophilic amine addition and subsequent Boc-protection, 2) photochemical demetallation of the iron complex, and 3) an intramolecular Heck reaction. Minor modifications to the protocol enabled access to the related 2-azabicyclo[4.4.1]undecane system, albeit in lower yield.

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36

Jansen van Vuuren, Leandri, Hendrik G. Visser, and Marietjie Schutte-Smith. "Crystal structure of 2-(methylamino)tropone." Acta Crystallographica Section E Crystallographic Communications 75, no. 8 (2019): 1128–32. http://dx.doi.org/10.1107/s2056989019009502.

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The title compound, 2-(methylamino)cyclohepta-2,4,6-trien-1-one, C8H9NO, crystallizes in the monoclinic space group P21/c, with three independent molecules in the asymmetric unit. The planarity of the molecules is indicated by planes fitted through the seven ring carbon atoms. Small deviations from the planes, with an extremal r.m.s. deviation of 0.0345 Å, are present. In complexes of transition metals with similar ligands, the large planar seven-membered aromatic rings have shown to improve the stability of the complex. Two types of hydrogen-bonding interactions, C—H...O and N—H...O, are obse

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37

Machiguchi, Takahisa, Toshio Hasegawa, Megumi Ohno, Yoshio Kitahara, Makoto Funamizu, and Tetsuo Nozoe. "Highly stereoselective ring opening reaction of tropone oxime tosylate with nucleophiles." Journal of the Chemical Society, Chemical Communications, no. 12 (1988): 838. http://dx.doi.org/10.1039/c39880000838.

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38

Chen, Xuefei, Min Xu, Jin Lü, et al. "Biosynthesis of Tropolones inStreptomycesspp.: Interweaving Biosynthesis and Degradation of Phenylacetic Acid and Hydroxylations on the Tropone Ring." Applied and Environmental Microbiology 84, no. 12 (2018): e00349-18. http://dx.doi.org/10.1128/aem.00349-18.

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ABSTRACTTropolonoids are important natural products that contain a unique seven-membered aromatic tropolone core and exhibit remarkable biological activities. 3,7-Dihydroxytropolone (DHT) isolated fromStreptomycesspecies is a multiply hydroxylated tropolone exhibiting antimicrobial, anticancer, and antiviral activities. In this study, we determined the DHT biosynthetic pathway by heterologous expression, gene deletion, and biotransformation. Ninetrlgenes and some of the aerobic phenylacetic acid degradation pathway genes (paa) located outside thetrlbiosynthetic gene cluster are required for th

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39

Banwell, MG. "New Methods for the Synthesis of Troponoid Compounds." Australian Journal of Chemistry 44, no. 1 (1991): 1. http://dx.doi.org/10.1071/ch9910001.

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The ring expansion of 7-halogenobicyclo[4.1.0] heptenones and related compounds provides a useful new method for the preparation of the seven-membered conjugated carbocyclic compounds known as tropones and tropolones. This methodology has been exploited in the synthesis of various biologically active troponoid natural products including nezukone, the thujaplicins, thujaplicinol, MY3-469 and colchicine.

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40

Phelan, Zaki K., Philip S. Weiss, Yiqun He, Ziyang Guan, Dasan M. Thamattoor, and Daniel R. Griffith. "Synthetic Entry to the 2-Azatricyclo[4.3.2.04,9]undecane Ring System via Tropone." Journal of Organic Chemistry 85, no. 4 (2020): 2202–12. http://dx.doi.org/10.1021/acs.joc.9b02921.

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41

Mazaki, Yasuhiro, Yutaka Fujise, Yoshimasa Fukazowa, and Shô Itô. "The effect of strain on the tropone ring. [3]- and [5](2,7)troponophanes." Tetrahedron Letters 28, no. 9 (1987): 977–80. http://dx.doi.org/10.1016/s0040-4039(00)95891-x.

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42

Agami, Claude, François Couty, and Nicolas Rabasso. "Ring-closing metathesis of diolefinic oxazolidinones: a new access to tropanes and aminocyclitols." Tetrahedron Letters 42, no. 28 (2001): 4633–35. http://dx.doi.org/10.1016/s0040-4039(01)00830-9.

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43

Machiguchi, Takahisa, Yoshiyuki Wada, Toshio Hasegawa, Shinichi Yamabe, Tsutomu Minato, and Tetsuo Nozoe. "A Novel Synthesis of Trienes by Nucleophilic Ring Cleavage of Tropone Oxime Tosylate1,2." Journal of the American Chemical Society 117, no. 4 (1995): 1258–64. http://dx.doi.org/10.1021/ja00109a009.

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44

Hanquet, Bernard, and Roger Guilard. "Synthèses, réactivité et études structurales en série thiophéno[b]homotroponique." Canadian Journal of Chemistry 64, no. 7 (1986): 1310–21. http://dx.doi.org/10.1139/v86-225.

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Thiopheno[b]mono and bishomotropones are readily synthesized from thiopheno[b]tropones and dimethyloxosulfonium methylide. The position, the nature of the seven-membered ring substituents, and the reaction medium are the most important parameters of the cyclopropanation reaction. The structure of the monohomotropones is established by comparison with deuteriated analogues. The cis or trans configuration of the bishomotropones is determined by nmr data analysis of the corresponding alcohols. Clemmensen reduction leads to cycloocta or cyclonona[b]thiophenones. The structure of the latter is prov

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Duan, Ying, Marina Toplak, Anwei Hou, Nelson L. Brock, Jeroen S. Dickschat, and Robin Teufel. "A Flavoprotein Dioxygenase Steers Bacterial Tropone Biosynthesis via Coenzyme A-Ester Oxygenolysis and Ring Epoxidation." Journal of the American Chemical Society 143, no. 27 (2021): 10413–21. http://dx.doi.org/10.1021/jacs.1c04996.

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Armstrong, Alan, and Stephen E. Shanahan. "aza-Prins-pinacol Approach to 7-Azabicyclo[2.2.1]heptanes and Ring Expansion to [3.2.1]Tropanes." Organic Letters 7, no. 7 (2005): 1335–38. http://dx.doi.org/10.1021/ol0501267.

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Zhao, Jidong, Jun Liu, Xin Xie, Shi Li, and Yuanhong Liu. "Gold-Catalyzed Synthesis of Tropone and Its Analogues via Oxidative Ring Expansion of Alkynyl Quinols." Organic Letters 17, no. 23 (2015): 5926–29. http://dx.doi.org/10.1021/acs.orglett.5b03160.

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Agami, Claude, Francois Couty, and Nicolas Rabasso. "ChemInform Abstract: Ring-Closing Metathesis of Diolefinic Oxazolidinones: A New Access to Tropanes and Aminocyclitols." ChemInform 32, no. 40 (2010): no. http://dx.doi.org/10.1002/chin.200140220.

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MACHIGUCHI, T., Y. WADA, T. HASEGAWA, S. YAMABE, T. MINATO, and T. NOZOE. "ChemInform Abstract: A Novel Synthesis of Trienes by Nucleophilic Ring Cleavage of Tropone Oxime Tosylate." ChemInform 26, no. 26 (2010): no. http://dx.doi.org/10.1002/chin.199526069.

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Castro‐Fernández, Silvia, Carlos M. Cruz, Inês F. A. Mariz, et al. "Two‐Photon Absorption Enhancement by the Inclusion of a Tropone Ring in Distorted Nanographene Ribbons." Angewandte Chemie 132, no. 18 (2020): 7205–11. http://dx.doi.org/10.1002/ange.202000105.

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