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Relevant bibliographies by topics / Fused pyran

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Journal articles
Dissertations / Theses
Book chapters

Academic literature on the topic 'Fused pyran'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Fused pyran"

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Mukherjee, Prasun, and Asish R. Das. "Facile synthesis of functionalized 6-cyano-2-oxa-7-azabicyclo[4.1.0]hept-3-en-1-yl acetates: a catalyst free approach to access the pyran fused 2-acetoxy-NH-aziridines." RSC Advances 6, no. 1 (2016): 132–39. http://dx.doi.org/10.1039/c5ra24510a.

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Someswarao, B., Rasvan Khan P., B. Jagan Mohan Reddy, Sridhar B., and V. Subba Reddy B. "Tandem Prins-type cyclization for the stereoselective construction of fused polycyclic ring systems." Organic Chemistry Frontiers 5, no. 8 (2018): 1320–24. http://dx.doi.org/10.1039/c7qo01164d.

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A novel strategy has been developed for the synthesis of fused tetrahydrofuro[3,2-c]pyrano[2,3-b]chromene derivatives through the condensation of 2-hydroxybenzaldehydes with 2-(3,4-dihydro-2H-pyran-5-yl)ethan-1-ol in the presence of 20 mol% TMSOTf.

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Li, Shihang, Aimin Yu, Jianfa Li, and Xiangtai Meng. "Synthesis of Benzothiophene-Fused Pyran Derivatives via Piperidine Promoted Domino Reaction." Heteroatom Chemistry 2019 (May 2, 2019): 1–6. http://dx.doi.org/10.1155/2019/4361410.

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A new domino reaction between thioaurones and malononitrile has been reported. This reaction allows efficient access to benzothiophene-fused pyran derivatives in good yields under mild reaction conditions. The substrate scope is broad; a series of benzothiophene-fused pyran derivatives have been synthesized.

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Hurtak, Jessica, and Frank McDonald. "Regioselectivity of Mercury-Promoted Oxacyclizations of Alkynyl Diols." Synlett 28, no. 20 (2017): 2951–55. http://dx.doi.org/10.1055/s-0036-1588562.

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Hg(OTf)2-catalyzed cyclization of an alkynyl alcohol on a tetrahydropyran template gives the bispyranyl ketone arising from dehydrative cyclization and alkyne hydration, rather than the targeted fused pyran-oxepane product. The combination of stoichiometric Hg(OTf)2 and triethylsilane gives reductive cyclization, but affords the fused pyran-oxocane corresponding to an 8-endo-mode oxacyclization process.

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Ishikawa, Yoshinobu. "Crystal structure of 3-acetyl-4H-chromen-4-one." Acta Crystallographica Section E Crystallographic Communications 71, no. 7 (2015): o527. http://dx.doi.org/10.1107/s2056989015012098.

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In the title compound, C11H8O3, the fused-ring system is almost planar (r.m.s. deviation = 0.020 Å), with the largest deviation from the least-squares plane [0.0462 (17) Å] being for a pyran C atom. The dihedral angle between the plane of the fused-ring system and acetyl plane is 5.149 (16)°. In the crystal, the fused rings are linked by aromatic π–π stacking interactions [centroid–centroid distance between the benzene and pyran rings = 3.643 (6) Å] and C—H...O hydrogen bonds, generating a three-dimensional network.

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Lee, Jui-Ting, Nagesh Jatangi, Sameer Vyasamudri, and Ding-Yah Yang. "Three-component synthesis of pyran-fused biscoumarins: an entry to pyridinone- and pyranone-fused coumarins." RSC Advances 14, no. 21 (2024): 14767–74. http://dx.doi.org/10.1039/d4ra01681e.

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Rathin, Jana. "Intramolecular palladium-catalyzed reaction β-H elimination or C–H activation: A general method for the synthesis of fused pyran rings". International Journal of HIT Transaction on ECCN Vol. 7, № 1A (2021) (2021): 90–99. https://doi.org/10.5281/zenodo.5893081.

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Department of Chemistry, Shahid Matangini Hazra Govt. General Degree College for Women, Nimtouri, West Bengal, India. Pyrans constitute an important class of 6-member heterocycles with one oxygen atom. Together with its benzo derivatives, pyrans can formulate a prevalent verity of natural and synthetic products in industrial applications. This is an important core molecule having versatile use with its derivatives in pharmaceuticals, dye industry, catalysis, agrochemicals and many more. Several methods for the preparation of pyranderivatives have been reported earlier. In this mini review we h

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Li, Jun-Lin, Xiao-Hui Wang, Jun-Chao Sun, Yi-Yuan Peng, Cong-Bin Ji, and Xing-Ping Zeng. "Chiral Tertiary Amine Catalyzed Asymmetric [4 + 2] Cyclization of 3-Aroylcoumarines with 2,3-Butadienoate." Molecules 26, no. 2 (2021): 489. http://dx.doi.org/10.3390/molecules26020489.

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Coumarins and 2H-pyran derivatives are among the most commonly found structural units in natural products. Therefore, the introduction of 2H-pyran moiety into the coumarin structural unit, i.e., dihydrocoumarin-fused dihydropyranones, is a potentially successful route for the identification of novel bioactive structures, and the synthesis of these structures has attracted continuing research interest. Herein, a chiral tertiary amine catalyzed [4 + 2] cyclization of 3-aroylcoumarines with benzyl 2,3-butadienoate was reported. In the presence of Kumar’s 6’-(4-biphenyl)-β-iso-cinchonine, the desi

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Safari, Fatemeh, Hajar Hosseini, Mohammad Bayat, and Ashkan Ranjbar. "Synthesis and evaluation of antimicrobial activity, cytotoxic and pro-apoptotic effects of novel spiro-4H-pyran derivatives." RSC Advances 9, no. 43 (2019): 24843–51. http://dx.doi.org/10.1039/c9ra03196k.

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Sughanya, V., and N. Sureshbabu. "9-(4-Hydroxy-3,5-dimethoxyphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione." Acta Crystallographica Section E Structure Reports Online 68, no. 4 (2012): o1060. http://dx.doi.org/10.1107/s1600536812010410.

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In the title compound, C25H30O6, the two fused cyclohexanone rings have envelope conformations, whereas the central pyran ring is roughly planar [mximum deviation = 0.045 (2) Å]. The pyran and benzene rings are almost perpendicular to each other, making a dihedral angle of 86.32 (2)°. In the crystal, molecules are linkedviapairs of O—H...O hydrogen bonds, forming inversion dimers.

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Dissertations / Theses on the topic "Fused pyran"

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More, Sandeep Pandharinathrao [Verfasser], and Dietmar [Akademischer Betreuer] Plattner. "Design, synthesis and properties of pyrene-fused azaacenes and their applications in organic electronics = Design, Synthese und Eigenschaften von Pyren kondensierten Azaacenes und deren Anwendungen in der organischen Elektronik." Freiburg : Universität, 2014. http://d-nb.info/1115813676/34.

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Hsu, Che-Hao, and 許哲豪. "Synthesis of Benzol Pyran Fused Carbazole Derivatives through Pictet-Spengler Reaction and Synthesis of the 4-Benzylidene-3,6-di-phenylhex-2-en-5-ynal Deriva- tives via One-Pot Palladium Catalysed Sonogashira and Hydroalkynylation Cascade Reactions." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/99080233803268094885.

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碩士<br>國立臺灣師範大學<br>化學系<br>102<br>This thesis consists two parts. In which the first part of thesis describes the preparation of benzopyran fused carbazole derivatives from (2R,3R,4S)-4-(1H-indol-3-yl)-2-phenylchroman-3-amine through Pictet-Spengler reaction. A wide variety of benzopyran fused carbazole derivatives were synthesized in this process in good to moderate yields. The second part deals with the Pd catalyzed one pot Sonogashira and hydroalkynylation cascade reactions to the synthesis of the 4-benzylidene-3,6-diphenylhex-2-en-5-ynal derivatives. This is an unprecedented result whe

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Book chapters on the topic "Fused pyran"

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Kranjc, Krištof, Slovenko Polanc, and Marijan Kočevar. "2H-Pyran-2-ones and Fused Pyran-2-ones: Cycloaddition Reactions." In 19th International Congress on Heterocyclic Chemistry. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-08-044304-1.50203-3.

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S. Laitonjam, Warjeet, and Nimalini Moirangthem. "Construction of Biologically Active Five- and Six-Membered Fused Ring Pyrimidine Derivatives from 1,3-Diarylthiobarbituric Acids (DTBA)." In Strategies Towards the Synthesis of Heterocycles and Their Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108842.

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Several derivatives of fused pyrimidines were synthesized in maximum yields by using the respective condensation products, namely, 5-ethoxymethylene-1,3-diaryl-2-thiobarbituric acids and 5-phenyl-methylene-1,3-diaryl-2-thiobarbituric acids, which can be obtained from 1,3-diarylthiobarbituric acids (DTBA). These condensation products possessing three electrophilic centres could undergo cyclocondensation with various binucleophiles to give various fused heterocycles of pyrimidine derivatives, such as pyrazolo[3,4-d]pyrimidine-6-thiones, 5,7-diaryl-4-oxo-isoxazolo[5,4-d]pyrimidine-6-thiones, 5-ox

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Gallagher, P. T. "Diels–Alder Reactions of Pyrano[3,4-]indol-3(9)-one." In Fused Five-Membered Hetarenes with One Heteroatom. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-010-00879.

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