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Journal articles on the topic '3-d]pyrimidin-4(3H)-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

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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4

Janeba, Zlatko, Noha Maklad, and Morris J. Robins. "Synthesis of 6-(alkoxymethyl)- and 6-(alkylsulfanylmethyl)furo[2,3-d]pyrimidin-2(3H)-one analogues." Canadian Journal of Chemistry 84, no. 4 (2006): 561–68. http://dx.doi.org/10.1139/v06-042.

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Treatment of 6-(hydroxymethyl)furo[2,3-d]pyrimidin-2(3H)-one (2) with 1-iodoalkanes and potassium carbonate resulted in predominant formation of N3 (and minor amounts of O2) alkylated regioisomers. Treatment of the 3-alkyl products (3) with thionyl chloride gave highly reactive 6-chloromethyl intermediates (5). Direct solvolysis of 5 in alcohol solutions (~50 °C) produced 3-alkyl-6-(alkoxymethyl)furopyrimidin-2(3H)-ones (6), whereas extensive decomposition of 5 occurred with added base promoters. Sonication of 5 with sodium thioacetate in acetonitrile gave the air-stable 6-(alkylsulfanylmethyl

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5

EL-Mahdy, Ahmed F. M., Hassan A. H. El-Sherief, and Zainab A. Hozien. "Convenient One-Pot Four-Component Synthesis of 6,8-Disubstituted-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4(3H)-ones via a Triple Mannich Reaction." Australian Journal of Chemistry 72, no. 7 (2019): 542. http://dx.doi.org/10.1071/ch19088.

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An efficient and simple one-pot four-component protocol has been developed and performed for the synthesis of 6,8-disubstituted-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4(3H)-ones, involving a triple Mannich reaction of 6-amino-2-(ethylthio)pyrimidin-4(3H)-one, formaldehyde, primary amines, and alcohols. Secondary amines were also utilised instead of alcohols as Mannich nucleophiles, and a variety of functional groups and electronically varied reaction partners were tolerated. This one-pot reaction facilitated the generation of a library of pyrimido[4,5-d]pyrimidin-4(3H)-ones in very good to

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6

Hamed, Atef A., Hesham F. Bader, and El-Sayed H. El-Ashry. "4′, x-Seco And 4′,x-4′,5′-Diseco C-Nucleosides From 2-Hydrazino-(3H)- Thieno [2,3-D] Pyrimidin-4-Ones." Zeitschrift für Naturforschung B 56, no. 8 (2001): 826–36. http://dx.doi.org/10.1515/znb-2001-0817.

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Cyclization of 2-hydrazino-5,6-dimethyl-3H-thieno[2,3-d]pyrimidin-4-one (1) with acetic acid gave 3,6,7-trimethyl-l,2,4-triazolo[3,4-a]thieno[2,3-d] pyrimidin-5-one (5) whose Dimroth rearrangement gave 2,6,7-trimethyl-l,2,4-triazolo[3,4-a]thieno[2,3-d]pyrimidin-5-one (11). Alternatively, 5 was obtained from the dehydrogenative cyclization of acetaldehyde 5,6- dimethyl-4-3H-oxo-thieno[2,3-d]pyrimidin-2-yl hydrazone (7). Reaction of 1 and 2 with a number of sugars gave the respective hydrazones 19 and 20. Those of the D-glucose exist in the cyclic pyranosyl structure in addition to minor amounts

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7

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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8

Khatamov, Khamroqul, Fozil Saitqulov, Jamshid Ashurov, and Khusnutdin Shakhidoyatov. "3,5,6-Trimethylthieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 68, no. 9 (2012): o2740. http://dx.doi.org/10.1107/s1600536812035416.

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9

Thokchom, Herojit S., Anita D. Nongmeikapam, and Warjeet S. Laitonjam. "Synthesis of fused pyrazolo-, isoxazolo-, pyrimido-, and pyridopyrimidines." Canadian Journal of Chemistry 83, no. 8 (2005): 1056–62. http://dx.doi.org/10.1139/v05-054.

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A systematic study of the synthesis of the 5,7-diaryl-4-oxo-pyrazolo[3,4-d]pyrimidin-6-thiones (3), 2-phenyl-5,7-bis(2′-methylphenyl)-4-oxo-pyrazolo[3,4-d]pyrimidin-6-thiones (4b), 2(3H)-3-phenyl-5,7-diaryl-4-oxo-pyrazolo[3,4-d]pyrimidin-6-thiones (5), 5,7-diaryl-4-oxo-isoxazolo[5,4-d]pyrimidin-6-thiones (7), 3,5,7-triaryl-2,3-dihydro-4-oxo-isoxazalo[5,4-d]pyrimidin-6-thiones (8), 2-amino-6,8-diaryl-5-oxo-pyrimido[4,5-d]pyrimidin-7-thiones (9), 3,4-dihydro-2-amino-4-phenyl-6,8-diaryl-5-oxo-pyrimido[4,5-d]pyrimidin-7-thiones (10), 3-cyano-6,8-diaryl-2,5-dioxo-pyrido[2,3-d]pyrimidin-7-thiones (1

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10

Zheng, Aihua, Jing Xu, and Yang-Gen Hu. "2-Cyclohexylamino-5,6-dimethyl-3-phenyl-3H-thieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 62, no. 9 (2006): o3710—o3711. http://dx.doi.org/10.1107/s1600536806030248.

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11

Nie, Li Fei, Guozheng Huang, Khurshed Bozorov, et al. "Diversity-oriented synthesis of amide derivatives of tricyclic thieno[2,3-d]pyrimidin-4(3H)-ones and evaluation of their influence on melanin synthesis in murine B16 cells." Heterocyclic Communications 24, no. 1 (2018): 43–50. http://dx.doi.org/10.1515/hc-2017-0256.

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Abstract A diversity-oriented synthesis of amide-containing thieno[2,3-d]pyrimidin-4(3H)-ones is reported. All compounds were tested for their influence on melanin synthesis in murine B16 cells. The azepine fragment in thieno[2,3-d]pyrimidin-4(3H)-one skeleton significantly increases the melanin content.

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12

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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13

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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14

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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15

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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16

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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17

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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18

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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19

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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20

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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21

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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22

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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23

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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24

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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25

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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26

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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27

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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28

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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29

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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30

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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31

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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32

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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33

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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34

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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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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35

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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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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36

CHAITANYA, G. DAVE, R. SHAH P., B. SHAH A., C. DAVE K., and J. PATEL VARSHA. "Synthesis and Biological Activity of Pyrido[3',2': 4,5)thieno[3,2-d]pyrimidines." Journal of Indian Chemical Society Vol. 66, JAN 1989 (1989): 48–50. https://doi.org/10.5281/zenodo.5948607.

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Department of Chemistry, St. Xavier's College, Navrangpura, Ahmedabad-380 009 <strong>D</strong>epartment of Pharmacology, N. H. L. Municipal Medical College, Ahmedabad-880 007 <em>Manuscript received I4 July 1988, revised 29 September 1988, accepted 4 October 1988</em> 2-Carbetboxy-3-aminothieno [2,3-b]pyridines (1) were reacted with isothiocyanates to obtain 2-thioxo-3-substituted-7, 9-diphenylpyrido[3<em>'</em>, 2<em>'</em> : 4,5]thieno[3, 2-d]pyrimidin-4 (3H)-ones (3) which on methylation afforded 2-methyimerrapro-3-sabstitated-7,9-diphenylpyrido[3<em>'</em>2<em>&

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37

Shyyka, Olga, Nazariy Pokhodylo, Nataliya Finiuk, Vasyl Matiychuk, Rostyslav Stoika, and Mykola Obushak. "Anticancer Activity Evaluation of New Thieno[2,3-d]pyrimidin-4(3H)-ones and Thieno[3,2-d]pyrimidin-4(3H)-one Derivatives." Scientia Pharmaceutica 86, no. 3 (2018): 28. http://dx.doi.org/10.3390/scipharm86030028.

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Anticancer screening of several novel thienopyrimidines has been performed. The thienopyrimidine derivatives were synthesized from available starting materials according to the convenient synthetic procedures using a one-pot solvent-free reaction which gave a wide access to thienopyrimidine-derivative production. The synthesized compounds were preselected via molecular docking to be tested for their anticancer activity in NCI 60 cell lines. It was observed that some compounds showed remarkable anticancer activity. It was found that the most active compound among thieno[2,3-d]pyrimidine-4(3H)-o

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38

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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39

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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40

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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41

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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42

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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43

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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44

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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45

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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46

Low, J. N., G. Ferguson, J. Cobo, M. Nogueras, A. Sanchez, and A. Marchal. "2-Methoxy-3-methyl-6-[(triphenylphosphoranylidene)amino]pyrimidin-4(3H)-one and 3-Methyl-2-methylthio-6-[(triphenylphosphoranylidene)amino]pyrimidin-4(3H)-one." Acta Crystallographica Section C Crystal Structure Communications 54, no. 9 (1998): 1355–57. http://dx.doi.org/10.1107/s0108270198003795.

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47

Vasu, K. A. Nirmala, Deepak Chopra, S. Mohan, and J. Saravanan. "3-Amino-2-methyl-5,6,7,8-tetrahydro-1-benzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 60, no. 7 (2004): o1239—o1240. http://dx.doi.org/10.1107/s1600536804014862.

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48

Qu, Yong-Nian, Long-Rui Pan, and Yang-Gen Hu. "3-Phenyl-2-(prop-2-ynyloxy)-1-benzofuro[3,2-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 64, no. 1 (2007): o137. http://dx.doi.org/10.1107/s160053680706326x.

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49

Wang, Hong-Mei, Xiao-Hua Zeng, Ai-Hua Zheng, Jia-Hua Tian, and Ting-Yun He. "3-Butyl-2-(piperidin-1-yl)-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 63, no. 11 (2007): o4365. http://dx.doi.org/10.1107/s160053680705026x.

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Abstract:

In the title compound, C19H27N3OS, the central thienopyrimidine ring system is essentially planar. The cyclohexene ring adopts a half-chair conformation, while the piperidine ring is in a standard chair conformation. There is an intramolecular C—H...O hydrogen bond, which stabilizes the molecular structure. The crystal packing is stabilized by C—H...π interactions.

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50

Zeng, Xiao-Hua, Ju-Zhen Yuan, Nian-Yu Huang, Ming-Wu Ding, and Hong-Wu He. "3-Isopropyl-2-propoxy-5,6,7,8-tetrahydro-1-benzothieno[2,3-d]pyrimidin-4(3H)-one." Acta Crystallographica Section E Structure Reports Online 61, no. 12 (2005): o4336—o4337. http://dx.doi.org/10.1107/s1600536805038158.

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