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Journal articles on the topic '3-d] pyrimidin-4-one'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Hafez, Hend N., and Abdel-Rhman B. A. El-Gazzar. "Synthesis and evaluation of antitumor activity of new 4-substituted thieno[3,2-d]pyrimidine and thienotriazolopyrimidine derivatives." Acta Pharmaceutica 67, no. 4 (2017): 527–42. http://dx.doi.org/10.1515/acph-2017-0039.

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Abstract 3-Methyl-6-phenyl-2-thioxo-2,3-dihydrothieno[3,2-d]pyrimidin- 4(1H)-one (2), on treatment with phosphorous oxychoride, affored 4-chloro-3-methyl-6-phenyl -thieno[3,2-d]pyrimidine- 2(3H)-thione (3). A series of novel 6-phenyl-thieno[3,2-d]pyrimidine derivatives 4-9 bearing different functional groups were synthesized via treatment of compound 3 with different reagents. On the other hand, compound 2 was used to synthesize ethyl-[(3-methyl-6-phenyl-2-thioxo-2,3-dihydrothieno[ 3,2-d]pyrimidin-4-yl)-oxy]acetate (10), 2-hydrazinyl- -3-methyl-6-phenyl-thieno[3,2-d]pyrimidin-4(3H)-one (11), 3

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2

El-Shahawi, Manal M., and Ahmed K. El-Ziaty. "Enaminonitrile as Building Block in Heterocyclic Synthesis: Synthesis of Novel 4H-Furo[2,3-d][1,3]oxazin-4-one and Furo[2,3-d]pyrimidin-4(3H)-one Derivatives." Journal of Chemistry 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/5610707.

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2-Amino-4,5-diphenylfuran-3-carbonitrile 1 was utilized as building block for the construction of new furo[2,3-d]pyrimidin-4(3H)-one derivative 2 and 4H-furo[2,3-d][1,3]oxazin-4-one derivative 3 via treatment with acetic anhydride and benzoyl chloride, respectively. The 4H-furo[2,3-d][1,3]oxazin-4-one derivative 3 was transformed into novel furo[2,3-d]pyrimidin-4(3H)-ones 4–8, tetrazolylfuran derivative 10, and furo[3,2-d]imadazolone derivative 11 via reaction with various nitrogen nucleophiles. The structure features of the synthesized compounds were established from their spectral and elemen

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3

Abdelhamid, Abdou O., Zeineb H. Ismail, and Anhar Abdel-Aziem. "Reactions with Hydrazonoyl Halides 601: Synthesis of Thieno[2′,3′:4,5] Pyrimidino[1,2-b][1,2,4,5]tetrazines, [1]benzothieno[2′,3′:4,5]pyrimidino [1,2-b][1,2,4,5]tetrazines, Pyrazolo[3′,4′:4,5]pyrimidino[1,2-b] [1,2,4,5]tetrazines and Pyrazolo[3,4-d]pyridazines." Journal of Chemical Research 2007, no. 10 (2007): 609–16. http://dx.doi.org/10.3184/030823407x256118.

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Thieno[2′,3′:4,5]pyrimidino[1,2- b][1,2,4,5]tetrazine, [1]benzothieno-[2′,3′:4,5]pyrimidino[1,2- b][1,2,4,5]tetrazine, pyrazolo [3′,4′:4,5]pyrimidino[1,2- b][1,2,4,5]tetrazine, triazolo[4,3- a]pyrimidin-5(1 H)-one, 1-{[2-(1-benzofuran-2-yl)-5-phenyl-4,5-dihydro-1 H-pyrazol-1-yl]-4-substituted-1,3-thiazol-5-yl}-2-phenyldiazene, 3-acyl-4-(1-benzofuran-2-ylcarbonyl) pyrazole and pyrazolo[3,4- d]pyridazine derivatives could be obtained via reactions of hydrazonoyl halides with the appropriate pyrimidine-2-thione, 3-amino-5,6-dimethyl-2-sulfanylthieno[2,3- d]pyrimidin-4(3 H)-one, 5-amino-6-mercapto

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4

Hu, Yang-Gen, Jun Hu, and Hai-Tao Gao. "3-Isopropyl-2-morpholinobenzofuro[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 63, no. 12 (2007): o4735. http://dx.doi.org/10.1107/s1600536807057662.

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5

Dabaeva, V. V., M. R. Baghdasaryan, I. M. Barkhudaryants, E. G. Paronikyan, and Sh Sh Dashyan. "Synthesis of new fused 3(4)-substituted 11-furylthieno[3,2-<i>d</i>]pyrimidine derivatives." Журнал общей химии 93, no. 9 (2023): 1351–57. http://dx.doi.org/10.31857/s0044460x23090056.

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A method was developed for the synthesis of new fused 3-alkyl-substituted derivatives of thieno[3,2- d ]pyrimidin-4(3 H )-ones based on 11-(2-furyl)-8,8-dimethyl-7,10-dihydro-8 H -pyrano[3′′,4′′:5′,6′]pyrido[3′,2′:4,5]-thieno[3,2- d ]pyrimidin-4(3 H )-one via nucleophilic substitution in the pyrimidine ring. A series of fused 4-amino-substituted 11-furylthieno[3,2- d ]pyrimidine derivatives was also synthesized from the corresponding 4-chloro derivative.

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6

Z h a o, J., Z. M u r t a z a e v a, A. B u r o n o v, D. B Tukhtaev, K. h. A Bozorov, and H. A Aisa. "NEUROPROTECTIVE PROPERTIES OF THE PYRAZOLO[3,4-D]PYRIMIDINONES." 2022-yil, 3-son (133/1) ANIQ FANLAR SERIYASI 5, no. 135/2 (2022): 1–7. http://dx.doi.org/10.59251/2181-1296.v5.1352.1163.

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Two series of the novel an aryl(heteryl)idene containing pyrazolo[3,4-d]pyrimidin-4-one targets (5a-o and 6a−o) were performed applying by the condensation of tricyclic pyrazolo[3,4-d]pyrimidin-4-ones (3 and 4) with the appropriate aromatic aldehydes in the basic condition. Some derivatives demonstrated AChE and BuChE inhibition

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7

Prabhakar, Virupakshi. "Synthesis of New Derivatives of Thieno[2,3-d]pyrimidin-4(3H)-one and their Antimicrobial Activity." Medicinal Chemistry 9, no. 3 (2019): 6. https://doi.org/10.4172/2161-0444.1000531.

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A series of new thieno[2,3-d]pyrimidin-4(3H)-one derivatives were synthesized. The newly synthesized compounds were characterized by IR, 1 H NMR, 13C NMR and mass spectral data. All the newly synthesized thieno[2,3-d]pyrimidin-4(3H)-one derivatives were screened for antibacterial activity against Staphylococcus aureus, Bacillus subtilis (gram positive bacteria), Escherichia coli, Pseudomonas aeruginosa (gram negative bacteria) and antifungal activity was carried out against Candida albicans and Aspergillus niger.

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8

Yin, Xuelian, and Yang-Heon Song. "5-Methyl-1-phenyl-3-(thieno[2,3-d]pyrimidin-4-yl)chromeno[4,3-d]pyrazolo[3,4-b]pyridin-6(3H)-one." Molbank 2022, no. 4 (2022): M1469. http://dx.doi.org/10.3390/m1469.

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A chromeno[4,3-d]pyrazolo[3,4-b]pyridinone derivative 3 bearing thieno[2,3-d]pyrimidine moiety, 5-methyl-1-phenyl-3-(thieno[2,3-d]pyrimidin-4-yl)chromeno[4,3-d]pyrazolo[3,4-b]pyridin-6(3H)-one, was efficiently prepared in 75% yield by the reaction of 3-phenyl-1-(thieno[2,3-d]pyrimidin-4-yl)-1H-pyrazol-5-amine 1 with 3-acetyl-2H-chromen-2-one 2 in the presence of FeCl3-SiO2 as a catalyst in refluxing ethanol for 6 h. The structure of the new synthesized compound was characterized by 1H-, 13C- NMR, IR spectroscopy, mass-spectrometry, and elemental analysis.

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9

Vlasov, Sergiy V., Sergiy M. Kovalenko, Pavlo E. Shynkarenko, Konstantin Yu Krolenko, and Vitaliy S. Vlasov. "Synthesis and antimicrobial evaluation of 3-(4-arylthieno[2,3-d]pyrimidin-2-yl)- 2H-chromen-2-ones." Heterocyclic Communications 24, no. 4 (2018): 237–40. http://dx.doi.org/10.1515/hc-2018-0013.

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AbstractSyntheses of 3-(4-arylthieno[2,3-d]pyrimidin-2-yl)-2H-chromen-2-ones 5 by the reaction of 2-iminocoumarin-3-carboxamides 1 with (2-aminothiophen-3-yl)(aryl)methanones 2 and by the alternative Suzuki coupling of 4-chlorothieno[2,3-d]pyrimidin-2-yl-2H-chromen-2-one 7 with arylboronic acids were developed. Compound 5d showed higher antimicrobial activity against Staphylococcus aureus than the reference drug streptomycin.

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10

Chen, Xiao-Bao, Jing Xu, Ai-Hua Zheng, Jia-Hua Tian, and Hong Luo. "3-Isopropyl-2-(4-methoxyphenoxy)-1-benzofuro[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 65, no. 11 (2009): o2839. http://dx.doi.org/10.1107/s1600536809042925.

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11

Liao, Quan-Bin, Gui-Hua Li, Zheng-Rong Zhu, and Ming-Guo Liu. "3-(4-Chlorophenyl)-2-(diisopropylamino)-1-benzofuro[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 64, no. 1 (2007): o13. http://dx.doi.org/10.1107/s1600536807060412.

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12

Xu, Sheng-Zhen, Hong Luo, and Ai-Hua Zheng. "2-Diethylamino-3-(4-methylphenyl)-1-benzothieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 12 (2006): o5828—o5829. http://dx.doi.org/10.1107/s1600536806050124.

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13

Sun, Yong, and Yang-Gen Hu. "3-(4-Methylphenyl)-2-morpholinobenzo[4,5]furo[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 61, no. 12 (2005): o4233—o4235. http://dx.doi.org/10.1107/s1600536805037918.

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14

Hafez, Hend N., Abdel-Rhman B. A. El-Gazzar, and Magdi E. A. Zaki. "Simple approach to thieno[3,2-d]pyrimidines as new scaffolds of antimicrobial activities." Acta Pharmaceutica 66, no. 3 (2016): 331–51. http://dx.doi.org/10.1515/acph-2016-0029.

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Abstract 6ʹ-(4-Chlorophenyl)-spiro[cyclohexane-1,2ʹ-thieno[3,2-d][1,3] oxazin]-4ʹ(1ʹH)-one (1) was synthesized and used as a starting material for the synthesis of a novel series of spiro compounds having biologically active sulfonamide 2a-e and 3ʹ-(4-acetylphenyl)-6ʹ- (4-chlorophenyl)-1ʹH-spiro[cyclohexane-1,2ʹ-thieno[3,2-d] pyrimidine-4ʹ(3ʹH)-one (3). Compound 2a was used as a key intermediate for the synthesis of sulfonyl carbothioamide derivatives 4a-c. Also, compound 3 was used as an intermediate for the synthesis of 3ʹH-spiro[cyclohexane-1,2ʹ-thieno[3,2-d]pyrimidin]-3ʹ-yl] phenyl}-2-imin

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15

Liu, Ming-Guo, Ju-Zhen Yuan, Yang-Gen Hu, and Sheng-Zhen Xu. "2-Diethylamino-3-(3-methylphenyl)-1-benzofuro[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 1 (2005): o147—o149. http://dx.doi.org/10.1107/s1600536805040377.

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16

., Rovin, Dharmendra Kumar, Vikas Kumar, and Leeladhar Singh. "Spectral and Biological analysis of Thieno [2, 3-d] pyrimidin-4-one." International Journal of Advance Research and Innovation 4, no. 2 (2016): 1–5. http://dx.doi.org/10.51976/ijari.421601.

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Thieno [2,3-d] pyrimidin-4-one is synthesized by 2-amino-3-carboethoxythiophene and fomamide and its structure was also established using FTIR, UV-Vis and 1H-NMR spectroscopic method. The synthesized compound was also tested for antimicrobial activity against Escherichia coli, Bacillus subtilis and Staphylococcus aureus and fungus Candida albican, Aspergillus niger and Candida krusei.

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17

Kaliendina, S., M. Brynzei, M. Kut, S. M. Sukharev, Е. Ostapchuk та M. Onysko. "Kaliendina S., Brynzei M., Kut M., Sukharev S.M., Ostapchuk Е., Onysko M. REGIOSELECTIVITY OF ALKYLATION OF 2-(THIOPHENE-2-IL)THIENO[2,3 d]PYRIMIDINE-4(3H)-ONE". Scientific Bulletin of the Uzhhorod University. Series «Chemistry» 50, № 2 (2024): 40–45. http://dx.doi.org/10.24144/2414-0260.2023.2.40-45.

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Thieno[2,3-d]pyrimidines are an important class of heterocyclic compounds with a wide range of biological activities. The thieno[2,3-d]pyrimidin-4-one system is of the greatest interest to scientists, as it is one of a large number of possible thienopyrimidine derivatives. The presence of an amide fragment in these molecules allows for the introduction of various substituents via alkylation reactions. On the other hand, the presence of N- and O-nucleophilic centres makes it possible to form different types of alkylation products. In the present work, the alkylation reaction of 5,6-dimeth

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18

Fang, Zheng-Dong, and Ming-Wu Ding. "3-(4-Chlorophenyl)-5-ethyl-6-methyl-2-morpholinothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 7 (2006): o2869—o2871. http://dx.doi.org/10.1107/s1600536806020897.

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In the title compound, C19H20ClN3O2S, the two fused rings of the thieno[2,3-d]pyrimidin-4(3H)-one system are almost coplanar. The packing of the molecules in the crystal structure is mainly governed by intermolecular C—H...O hydrogen-bonding and π–π interactions.

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19

Xu, Sheng-Zhen, Min-Hui Cao, Yang-Gen Hu, Ming-Wu Ding, and Wen-Jing Xiao. "2-Ethoxy-3-isopropylbenzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 61, no. 9 (2005): o2789—o2790. http://dx.doi.org/10.1107/s1600536805024177.

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20

Hu, Yang-Gen, Sheng-Zhen Xu, Ju-Zhen Yuan, Ming-Wu Ding, and Hong-Wu He. "2-Diisopropylamino-3-phenylbenzo[4,5]furo[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 61, no. 8 (2005): o2649—o2651. http://dx.doi.org/10.1107/s1600536805022919.

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21

Xu, Sheng-Zhen, Yang-Gen Hu, Xiang Wang, and Ming-Wu Ding. "2-Ethoxy-3-phenyl-1-benzothieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 6 (2006): o2229—o2230. http://dx.doi.org/10.1107/s1600536806015959.

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22

Zeng, Xiao-Hua, Lan-Hua Zhao, Hong Luo, and Ji-Yin Long. "3-Isopropyl-2-morpholino-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 63, no. 6 (2007): o3004. http://dx.doi.org/10.1107/s1600536807022672.

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23

Zeng, Xiao-Hua, Hong-Mei Wang, Ai-Hua Zheng, Jia-Hua Tian, and Ting-Yun He. "3-Butyl-2-morpholino-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 63, no. 12 (2007): o4840. http://dx.doi.org/10.1107/s1600536807057558.

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24

Xu, Shengzhen. "3-Butyl-2-propylamino-1-benzothieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 64, no. 1 (2007): o42. http://dx.doi.org/10.1107/s1600536807062484.

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25

Cao, MinHui. "2-Ethylamino-3-phenyl-2-benzothieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 63, no. 1 (2006): o77—o78. http://dx.doi.org/10.1107/s1600536806051361.

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26

Zeng, Xiao-Hua, Hong-Mei Wang, Ze-Ping Cui, Ming-Wu Ding, and Hong-Wu He. "3-Benzyl-2-butylamino-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 1 (2005): o228—o229. http://dx.doi.org/10.1107/s1600536805041292.

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27

Avasthi, Kamlakar, Lakshmi Shukla, Ruchir Kant, and Krishnan Ravikumar. "Folded conformations due to arene interactions in dissymmetric and symmetric butylidene-linker models based on pyrazolo[3,4-d]pyrimidine, purine and 7-deazapurine." Acta Crystallographica Section C Structural Chemistry 70, no. 6 (2014): 555–61. http://dx.doi.org/10.1107/s2053229614009449.

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The butylidene-linker models 1-[2-(2,6-dimethylsulfanyl-9H-purin-9-yl)-2-methylidenepropyl]-4,6-bis(methylsulfanyl)-1H-pyrazolo[3,4-d]pyrimidine, C18H20N8S4, (XI), 7,7′-(2-methylidenepropane-1,3-diyl)bis[3-methyl-2-methylsulfanyl-3H-pyrrolo[2,3-d]pyrimidin-4(7H)-one], C20H22N6O2S2, (XIV), and 7-[2-(4,6-dimethylsulfanyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-2-methylidenepropyl]-3-methyl-2-methylsulfanyl-3H-pyrrolo[2,3-d]pyrimidin-4(7H)-one, C19H21N7OS3, (XV), show folded conformations in solution, as shown by1H NMR analysis. This folding carries over to the crystalline state. Intramolecular π–π int

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28

Ho, Yuh Wen, and Wei Hua Yao. "Thioxopyrimidine in Heterocyclic Synthesis III: Synthesis and Properties of Some Novel Heterocyclic Chalcone Derivatives Containing a Thieno[2,3-d]pyrimidine-Based Chromophore." Journal of Chemistry 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/649576.

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Cyclization of 4-methyl-2-phenyl-6-thioxo-1,6-dihydropyrimidine-5-carbonitrile1with chloroacetone in DMF in the presence of excess potassium carbonate anhydrous gave the 1-(5-amino-4-methyl-2-phenylthieno[2,3-d]pyrimidin-6-yl)ethanone3, which can react with 2,5-dimethoxytetrahydrofuran in glacial acetic acid producing the 1-[4-methyl-2-phenyl-5-(1H-pyrrol-1-yl)thieno[2,3-d]pyrimidin-6-yl]ethanone4. On the other hand, a series of novel 3-aryl-1-[4-methyl-2-phenyl-5-(1H-pyrrol-1-yl)-thieno[2,3-d]pyrimidin-6-yl]prop-2-en-1-one chalcone dyes6a—nwere obtained by the condensation reaction of 1-[4-me

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29

Rečnik, Simon, Anton Meden, Branko Stanovnik, and Jurij Svete. "Ring Contractions of 3-Azido-4H-quinolizin-4-ones and 3-Azido-4H-azino[1,2 - x]pyrimidin-4-ones: a Novel Approach to 3-Aminoindolizines and their Aza Analogues." Australian Journal of Chemistry 61, no. 2 (2008): 107. http://dx.doi.org/10.1071/ch07318.

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Thermal transformations of 3-azido-4H-quinolizin-4-ones 4a,b and 3-azido-4H-azino[1,2–x]pyrimidin-4-ones 4c,d, available from the corresponding heteroarylamines 2a–d, were studied. The reaction products were mostly dependent on the solvent. Thus, heating of 3-azido-1-cyano-4H-quinolizin-4-one (4a) in toluene afforded 2-(pyridin-2-yl)fumaronitrile 5a, whereas 3-amino-1-cyano-4H-quinolizin-4-one (8) was obtained on treatment of 4a in a mixture of toluene and trifluoroacetic anhydride. However, heating of 4a in acetic anhydride and in acetic acid resulted in a ring contraction to produce 3-(diace

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30

Cui, Zeping, Mingtian Li, Jianchao Liu, and Hongwu He. "3-(4-Fluorophenyl)-2-(4-methylphenoxy)-5,8,9-trimethylthieno[3′,2′:5,6]pyrido[4,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 61, no. 8 (2005): o2663—o2664. http://dx.doi.org/10.1107/s1600536805022968.

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31

Kut, M., D. Kut, and M. Onysko. "REGIOSELECTIVITY OF THE TELLURIUM-INDUCED CYCLISATION OF TERMINALLY SUBSTITUTED ALLYL, BUTENYL AND PROPARGYL THIOETHERS OF THIENOPYRIMIDINE." Scientific Bulletin of the Uzhhorod University. Series «Chemistry» 48, no. 2 (2023): 54–60. http://dx.doi.org/10.24144/2414-0260.2022.2.54-60.

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The method of electrophilic intramolecular cyclization is widely used for the synthesis of condensed thienopyrimidine derivatives. In this work, the regioselectivity of the process of electrophilic intramolecular cyclization of terminally substituted allylic derivatives, but-1-enyl and propargyl thioethers of thienopyrimidine with p-methoxyphenyltellurttrichloride was investigated. It was established that as a result of the tellurium-induced cyclization of butenyl thioethers of 5,6-dimethyl-3-phenylthieno[2,3-d]pyrimidin-4(3H)-one with p-methoxyphenyltellurium trichloride, angular tricyc

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32

Chen, Li, Shaofa Sun, and Gongwu Song. "Sequential One-Pot Synthesis of 5,6,8-Trihydropyrano[3',4':4,5]thieno[2,3-d]pyrimidin-4(3H)-one." Chinese Journal of Organic Chemistry 32, no. 07 (2012): 1314. http://dx.doi.org/10.6023/cjoc1111172.

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33

Hoti, Ramiz, Hamit Ismaili, Veprim Thaçi, Gjyle Mulliqi-Osmani, Malësore Pllana-Zeqiri, and Agon Bytyqi. "An Efficient Synthesis of Novel 3-[(Heteroaryl-2-ylimino)-methyl]-4-hydroxy-chromen-2-ones and Analogue of Tetrazole Derivatives and Their Antibacterial Activity." Molbank 2021, no. 4 (2021): M1303. http://dx.doi.org/10.3390/m1303.

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Synthesis of a series of the substituted [(pyridinyl and pyrimidin-2-ylimino)-ethyl]-4-hydroxy-chromen-2-ones and their tetrazole derivates is presented in this study. By catalytic condensation of 4-hydroxy-3-acetylcoumarine 2 and 2-aminopyridines 3(a-d), 3-[(pyridin-2-ylimino)-ethyl]-4-hydroxy-chromen-2-ones 4(a-d) are synthesized in high yield. During the condensation reaction of 2 and 4-amino-2,6-dihydroxypyrimidine 3e, 3-[1-(2,6-Dihydroxy-pyrimidin-4-ylimino)-ethyl]-4-hydroxy-chromen-2-one 4e as condensation products is synthesized. In following series, by cyclization reactions of compound

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34

Hu, Yang-Gen, Ai-Hua Zheng, and Gui-Hua Li. "3-(4-Methylphenyl)-2-(1-pyridyl)-3H-benzo[4,5]furo[3,2-d]pyrimidin-4-one." Acta Crystallographica Section E Structure Reports Online 62, no. 4 (2006): o1457—o1459. http://dx.doi.org/10.1107/s1600536806009238.

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35

Wang, Hong-Mei, Li-Li Chen, Ting Hu, and Xiao-Hua Zeng. "2-(4-Bromophenoxy)-3-isopropyl-5,6,7,8-tetrahydro-1-benzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 64, no. 12 (2008): o2404. http://dx.doi.org/10.1107/s160053680803732x.

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36

Wang, Xiang, Ai-Hua Zheng, and Sheng-Zhen Xu. "3-Phenyl-2-(piperidin-4-yl)benzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 11 (2006): o4791—o4792. http://dx.doi.org/10.1107/s1600536806039407.

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37

Hu, Yang-Gen, Jun Zhu, and Ai-Hua Zheng. "3-n-Butyl-2-(4-methylphenoxy)-3H-benzo[4,5]furo[3,2-d]pyrimidin-4-one." Acta Crystallographica Section E Structure Reports Online 62, no. 11 (2006): o4904—o4905. http://dx.doi.org/10.1107/s1600536806041304.

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38

Zeng, Xiao-Hua, Ming-Wu Ding, and Hong-Wu He. "2-(4-Chlorophenoxy)-3-isopropyl-5,6,7,8-tetrahydro-2-benzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 2 (2006): o731—o732. http://dx.doi.org/10.1107/s1600536806001218.

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39

Hu, Ya G., X. B. Chen, H. T. Gao, and M. W. Ding. "Crystal structure of 2-butylamino-3-(4-fluorophenyl) benzofuro[3,2-d]pyrimidin-4(3H)-one." Journal of Structural Chemistry 52, no. 3 (2011): 635–38. http://dx.doi.org/10.1134/s0022476611030280.

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40

Hu, Yang-Gen, Gui-Hua Li, Jia-Hua Tian, Ming-Wu Ding, and Hong-Wu He. "3-(4-Methoxyphenoxy)-2-phenyl-3H-1-benzofuro[3,2-d]pyrimidin-1-one." Acta Crystallographica Section E Structure Reports Online 61, no. 10 (2005): o3266—o3268. http://dx.doi.org/10.1107/s1600536805028734.

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41

Xu, Sheng-Zhen, Yang-Gen Hu, Ming-Guo Liu, and Ming-Wu Ding. "2-Morpholino-3-p-tolylbenzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 8 (2006): o3428—o3429. http://dx.doi.org/10.1107/s1600536806027127.

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42

Xu, Sheng-Zhen, and Yang-Gen Hu. "2-(tert-Butylamino)-3-phenylbenzo[4,5]thieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 12 (2006): o5647—o5648. http://dx.doi.org/10.1107/s1600536806048100.

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43

Zeng, Xiao-Hua, Hong-Mei Wang, Zai-Gang Luo, Ming-Wu Ding, and Hong-Wu He. "3-(2-Aminophenyl)-2-methylsulfanyl-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 61, no. 12 (2005): o4160—o4161. http://dx.doi.org/10.1107/s1600536805037025.

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44

Cao, Min-Hui, Sheng-Zhen Xu, and Yang-Gen Hu. "3-n-Butyl-2-methoxy-1-benzothieno[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 4 (2006): o1319—o1320. http://dx.doi.org/10.1107/s1600536806007549.

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Abstract:

The title compound, C15H16N2O2S, contains a five-membered thiophene ring fused to a benzene ring and a substituted pyrimidinone ring. All three rings in each of the independent molecules of the asymmetric unit lie in approximately the same plane. The crystal structure is stabilized by intermolecular C—H...O hydrogen bonding and π–π stacking interactions.

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45

Shi, Daxin, Liupan Yang, Jianhong Tang, Xiuzhen Wang, and Jiarong Li. "Spiro[cyclopentane-1,2′(1′H)-pyrido[2,3-d]pyrimidin]-4′(3′H)-one." Acta Crystallographica Section E Structure Reports Online 66, no. 9 (2010): o2301. http://dx.doi.org/10.1107/s1600536810027479.

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46

Fang, Zheng-Dong, and Ming-Wu Ding. "2-Diethylamino-6-ethyl-6-methyl-3-phenylthieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 7 (2006): o2862—o2863. http://dx.doi.org/10.1107/s1600536806021799.

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Abstract:

In the title compound, C19H23N3OS, the two fused rings of the thieno[2,3-d]pyrimidin-4(3H)-one system are almost coplanar. The packing of the molecules in the crystal structure is determined by van der Waals forces. No intermolecular hydrogen-bonding interactions or π–π stacking interactions are present in the crystal structure.

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47

Voeltera, Wolfgang, Mustafa M. El-Abadelahb, Salim S. Sabrib, and Monther A. Khanfar. "Synthesis and Properties of Biagra . A 5-(2,3-Dihydro-7-benzofuryl) Analog of Viagra®." Zeitschrift für Naturforschung B 54, no. 11 (1999): 1469–73. http://dx.doi.org/10.1515/znb-1999-1121.

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Abstract:

The synthesis and spectral properties (IR, MS, NMR) of a substituted 5-(2,3-dihydro-7- benzofuryl)pyrazolo[4,3-d]pyrimidin-7-one (2), an analog of Viagra® (1), are described. The generally applicable route involves interaction of 2,3-dihydro-7-benzofuranoyl chloride (3) with 4-amino-l-methyl-3-propyl-5-pyrazolecarboxamide (4), and the resulting bis-amide (5) is cyclized to the corresponding substituted pyrazolo[4,3-d]pyrimidin-7-one (6). Chlorosulfonylation of 6, followed by treatment with 1-methylpiperazine, furnished the title compound 2 (named Biagra). Preliminary experiments “associated wi

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48

Chen, Hong, and Quan-Bin Liao. "7-Benzyl-3-(4-chlorophenyl)-2-isobutylamino-5,6,7,8-tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 68, no. 3 (2012): o822. http://dx.doi.org/10.1107/s1600536812007246.

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49

Hu, Hai-Jun, and Hong Chen. "7-Benzyl-3-(4-fluorophenyl)-2-propylamino-5,6,7,8-tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 68, no. 4 (2012): o1097. http://dx.doi.org/10.1107/s1600536812010318.

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Abstract:

In the title compound, C25H25FN4OS, the thienopyrimidine fused-ring system is close to planar (r.m.s. deviation = 0.0089 Å), with a maximum deviation of 0.0261 (17) Å for the N atom adjacent to the benzene ring. This thienopyrimidine fused-ring system forms dihedral angles of 64.73 (3) and 81.56 (5)° with the adjacent benzyl and fluorophenyl rings, respectively. Intermolecular N—H...F and C—H...F hydrogen bonding, as well as C—F...π interactions [F...centroid = 3.449 (3) Å; C—F...centroid = 91.87 (15)°], help to stabilize the crystal structure.

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50

Balalaie, Saeed, Hamed Esmaeilabadi, Saber Mehrparvar, Frank Rominger, Fatima Hamdan, and Hamid Bijanzadeh. "Synthesis of Functionalized Dihydropyrido[2,3-d]pyrimidines in Aqueous Medium." SynOpen 02, no. 01 (2018): 0001–5. http://dx.doi.org/10.1055/s-0036-1591869.

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Abstract:

Synthesis of functionalized 2,3-dihydropyrido[2,3-d]pyrimidin-4(1H)-one from a cascade reaction between 3-formylchromone, malononitrile, diammonium hydrogen phosphate, and aromatic aldehydes in aqueous media is described.

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