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Journal articles on the topic '3-d]pyrimidine-diones'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Isakhanyan, A. U., N. Z. Hakobyan, Z. A. Hovasyan, et al. "Synthesis and effect of substituted pyrido[2,3-<i>d</i>]pyrimidine-2,4-diones on <i>In Vitro </i>tumor dna methylation." Журнал общей химии 93, no. 4 (2023): 525–30. http://dx.doi.org/10.31857/s0044460x23040042.

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Reaction of 3-diethylamino-1-aryl-, 3-diethylamino-1-aryl-2-phenyl(4-halophenyl)propane-1-ones hydrochlorides with 6-amino-1,3-dimethyluracil results in heterocyclization products, namely 1,3-dimethyl-7-aryl-5,6dihydro-1 H -pyrido[2,3- d ]pyrimidine-2,4-diones, 1,3-dimethyl-7-aryl-6-phenyl(4-halophenyl)-5,6-dihydro1 H -pyrido[2,3- d ]pyrimidine-2,4-diones and 1,3-dimethyl-7-aryl-6-phenyl-(4-halophenyl)-1 H -pyrido[2,3- d ] pyrimidine-2,4-diones. The effect of the synthesized compounds in vitro tumor DNA methylation was studied.

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2

Hamama, Wafaa S., Mohamed A. Ismail, Hana’a A. Al-Saman, and Hanafi H. Zoorob. "Convenient Selective Synthesis of Substituted Pyrido[2,3-d]pyrimidones and Annulated Derivatives." Zeitschrift für Naturforschung B 62, no. 1 (2007): 104–10. http://dx.doi.org/10.1515/znb-2007-0115.

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The reaction of 6-aminouracil (1) with the appropriate α,β -unsaturated ketones, gave the corresponding pyrido[2,3-d]pyrimidin-2,4-diones 3, 6, 8 and 10, respectively. Treatment of 1 with salicylaldehyde, 6-carboethoxy-3,5-diphenyl-2-cyclohexenone (13) or 2,6- bis(phenylmethylidene)cyclohexanone (15) afforded the corresponding pyrimido[4,5-d]quinoline- 2,4-diones 12, 14 and 16, respectively. Furthermore, a pyrido[2,3-d]pyrimidine incorporating 3,2’- bis(quinoline) derivative 18 was synthesized. Annulation of pyrido[2,3-d]pyrimidine with pyrazole or imidazole moieties was achieved via reaction

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3

Borrell, José I., Jordi Teixidó, Blanca Martínez-Teipel, et al. "An Unequivocal Synthesis of 4-Amino-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-2,7-diones and 2-Amino-3,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-4,7-diones." Collection of Czechoslovak Chemical Communications 61, no. 6 (1996): 901–9. http://dx.doi.org/10.1135/cccc19960901.

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An unequivocal set of procedures for the synthesis of 4-amino-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-2,7-diones (7) and 2-amino-3,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-4,7-diones (8), in a maximum of four steps from an α,β-unsaturated ester 1, is reported. Thus, the acid hydrolysis of the 2,4-diaminopyrido[2,3-d]pyrimidines 3 yields the 4-amino-2-oxopyrido[2,3-d]pyrimidines 7 while the cyclization of the Michael adducts 9 (formed by reaction of 1 and methyl cyanoacetate) with guanidine affords the corresponding 2-amino-4-oxopyrido[2,3-d]pyrimidines 8. Both isomers were also obtained by hy

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4

Daraie, Mansoureh, and Majid M. Heravi. "SMA/Py/ZnO as a new biocompatible polymer supported nanocatalyst for the synthesis of chromeno[2,3-d] pyrimidine-diones through a novel and efficient pathway." Canadian Journal of Chemistry 97, no. 11 (2019): 772–79. http://dx.doi.org/10.1139/cjc-2019-0127.

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An efficient and simple method for the synthesis of chromeno[2,3-d]pyrimidine-diones using SMA/Py/ZnO catalyst has been reported. Zinc oxide nanoparticles were coordinated on a modified poly(styrene-comaleic anhydride) (SMA) support to prevent agglomeration and reduction catalytic activity. The polymer support was easily prepared from the reaction of 3-aminopyridine with SMA. The catalyst was characterized by using various characterization techniques such as FTIR, 1H NMR, SEM, and EDX. The catalytic activity of SMA/Py/ZnO for the synthesis of chromeno[2,3-d]pyrimidine-diones through a multicom

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5

M, Heravi; Majid, and M. Daraie. "SMA/Py/ZnO as a new biocompatible polymer supported nanocatalyst for the synthesis of chromeno[2,3-d] pyrimidine-diones through a novel and efficient pathway." Canadian Journal of Chemistry 97, no. 11 (2019): 772–79. https://doi.org/10.1139/cjc-2019-0127.

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An efficient and simple method for the synthesis of chromeno[2,3-d]pyrimidine-diones using SMA/Py/ZnO catalyst has been reported. Zinc oxide nanoparticles were coordinated on a modified poly(styrene-comaleic anhydride) (SMA) support to prevent agglomeration and reduction catalytic activity. The polymer support was easily prepared from the reaction of 3-aminopyridine with SMA. The catalyst was characterized by using various characterization techniques such as FTIR,<sup>1</sup>H NMR, SEM, and EDX. The catalytic activity of SMA/Py/ZnO for the synthesis of chromeno[2,3-d]pyrimidine-diones through

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6

Tretyakov, N. A., M. V. Dmitriev, and A. N. Maslivets. "Synthesis of spiro(pyrrol-2,5'-pyrrolo[2,3-<i>d</i>]pyrimidine)2',4',5,6'-tetraones by the reaction of pyrrolo[2,1-<i>c</i>][1,4]oxazinetriones with 6-aminopyrimidine-2,4-diones." Журнал органической химии 59, no. 2 (2023): 180–86. http://dx.doi.org/10.31857/s0514749223020039.

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8-Aroyl-3,4-dihydro-1 H -pyrrolo[2,1- c ][1,4]oxazine-1,6,7-triones react with 6-aminopyrimidine-2,4(1 H ,3 H )diones to form 3-aroyl-4-hydroxy-1-(2-hydroxyalkyl)spiro(pyrrole-2,5'-pyrrolo[2,3- d ]pyrimidine)2',4',5,6'(1 H ,1' H ,3' H ,7' H )-tetraones, the structure of which was confirmed by X-ray diffraction analysis.

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7

Singh, Sonia, Mohammad H. Mosslemin, and Alireza Hassanabadi. "Synthesis of 5-Aryl-1,3-Dimethyl-7-Selenoxopyrimidino[4,5-d]Pyrimidine-2,4(1H,3H)-Dione." Journal of Chemical Research 42, no. 5 (2018): 264–66. http://dx.doi.org/10.3184/174751918x15265512038216.

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A one-pot method for the synthesis of six novel 5-aryl-1,3-dimethyl-7-selenoxopyrimidino[4,5- d]pyrimidine-2,4(1 H,3 H)-diones in excellent yields at room temperature has been achieved via reaction between potassium selenocyanate and an aroyl chloride followed by the addition of 6-amino- N,N′-dimethyluracil.

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8

Bogdanowicz-Szwed, Krystyna, та Aleksandra Pałasz. "Synthesis of 3,4-Dihydro-2H-pyrans by Hetero-Diels-Alder Reactions of Functionalized α,β-Unsaturated Carbonyl Compounds with Styrenes". Zeitschrift für Naturforschung B 56, № 4-5 (2001): 416–22. http://dx.doi.org/10.1515/znb-2001-4-515.

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Abstract Cycloadditions of 3-aryl-2-benzoyl-2-propenenitriles 1a,b to styrene (2a) and its methyl or methoxy-substituted derivatives 2b-d proceed regio- and diastereoselectively yielding cis and trans diastereoisomers of 2,4,6-triaryl-3,4-dihydro-2H-pyran-5-carbonitriles 3 and 4 in 59-72% yield. Cycloadducts cis-3 were the major products. Reaction of 5-(4-nitrobenzylidene)-1,3-dimethylbarbituric acid (5) with styrenes 2a-d afforded diastereoisomeric mixtures of 2H-pyrano[2,3-d]pyrimidine-2,4(3H)-diones cis-6 and trans-7 in 71 - 78% yield.

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9

Vlasov, Sergiy V., Hanna I. Severina, Oleksandr V. Borysov, et al. "Synthesis and Antimicrobial Evaluation of 2-(6-Imidazo[1,2-a]pyridin-2-yl-5-methyl-2,4-dioxo-3-phenyl-3,4-dihydrothieno[2,3-d]pyrimidin-1(2H)-yl)-N-arylacetamide Derivatives." Molbank 2022, no. 1 (2022): M1331. http://dx.doi.org/10.3390/m1331.

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6-Heteryl-5-methylthieno[2,3-d]pyrimidin-2,4(1H,3H)-diones are of great interest as the promising objects for the search of antibacterials. In this communication, we obtained 6-(imidazo[1,2-a]pyridin-2-yl)-5-methyl-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione by interaction of 6-(bromoacetyl)-5-methyl-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione with 2-aminopyridine. The obtained heterocyclic hybrid was further modified by alkylation with 2-chloroarylacetamides. Antimicrobial activity studies for the synthesized compounds using the agar well diffusion method revealed their moderate act

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10

Taghavi-Moghadam, Shahriyar, Rüdiger Stumpf, Helmut Fischer, and Wolfgang Pfleiderer. "Facile Synthesis of 6-Aryl-1,3-dimethyl-5H-pyrimido[4,5-b][1,4]diazepine-2,4(1H,3H)-diones." Collection of Czechoslovak Chemical Communications 64, no. 2 (1999): 313–20. http://dx.doi.org/10.1135/cccc19990313.

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A facile procedure for the preparation of 6-aryl-1,3-dimethyl-5H-pyrimido[4,5-b][1,4]diazepine2,4(1H,3H)-diones 8, 9 from 6-amino-5-arylideneamino-1,3-dimethyluracils 1, 2 and triethyl orthoacetate (3) in a two-step reaction via 6-aryl-8-ethoxy-6,7-dihydro-1,3-dimethyl-5H-pyrimido[4,5-b][1,4]diazepine-2,4(1H,3H)-diones 6, 7 is described. Condensation of 1 with diethoxymethyl acetate (10) resulted in the formation of (1,3-dimethyl-2,6-(1H,3H)-dioxopurin-7-yl)(phenyl)methyl acetate (11) and a small amount of 1,3-dimethyl-6-phenylpyrazino[2,3-d]pyrimidine-2,4(1H,3H)-dione (12). The structures of

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11

Karimi, Nasrin, Abolghasem Davoodnia, and Mehdi Pordel. "Synthesis of new 3H-chromeno[2,3-d]pyrimidine-4,6(5H,7H)-diones via the tandem intramolecular Pinner/Dimroth rearrangement." Heterocyclic Communications 24, no. 1 (2018): 31–35. http://dx.doi.org/10.1515/hc-2017-0228.

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Abstract The reaction of 2-amino-4-aryl-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitriles with excess aliphatic carboxylic acids in the presence of phosphoryl chloride (POCl3) afforded new 2-alkyl-5-aryl-8,8-dimethyl-8,9-dihydro-3H-chromeno[2,3-d]pyrimidine-4,6(5H,7H)-diones in high yields. The suggested mechanism involves a tandem intramolecular Pinner/Dimroth rearrangement. The synthesized compounds were characterized by infrared (IR), proton nuclear magnetic resonance (1H NMR), carbon-13 nuclear magnetic resonance (13C NMR) and elemental analysis.

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12

Baykova, Svetlana O., Kirill K. Geyl, Sergey V. Baykov, and Vadim P. Boyarskiy. "Synthesis of 3-(Pyridin-2-yl)quinazolin-2,4(1H,3H)-diones via Annulation of Anthranilic Esters with N-pyridyl Ureas." International Journal of Molecular Sciences 24, no. 8 (2023): 7633. http://dx.doi.org/10.3390/ijms24087633.

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A new route for the synthesis of quinazolin-2,4(1H,3H)-diones and thieno [2,3-d]pyrimidine-2,4(1H,3H)-diones substituted by pyridyl/quinolinyl moiety in position 3 has been developed. The proposed method concluded in an annulation of substituted anthranilic esters or 2-aminothiophene-3-carboxylates with 1,1-dimethyl-3-(pyridin-2-yl) ureas. The process consists of the formation of N-aryl-N′-pyridyl ureas followed by their cyclocondensation into the corresponding fused heterocycles. The reaction does not require the use of metal catalysts and proceeds with moderate to good yields (up to 89%). Th

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13

Mamouni, R., M. Akssira, M. Aadil, A. Elhakmaoui, J. Lasri, and E. Zaballos-Garcia. "A Facile Synthesis of New 3-Substituted-2,3- dihydropyrido[3,2-d]pyrimidine-2,4-diones." Synthetic Communications 33, no. 24 (2003): 4259–68. http://dx.doi.org/10.1081/scc-120026855.

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14

Saoud, M., F. B. Benabdelouahab, F. El Guemmout, and A. Romerosa. "ChemInform Abstract: Convenient Synthesis of 3-(1-Carboxyalkyl)pyrido[2,3-d]pyrimidine-2,4-diones." ChemInform 33, no. 52 (2010): no. http://dx.doi.org/10.1002/chin.200252198.

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15

Hayallah, Alaa M. "Design, Molecular Modeling and Synthesis of Some New Purine-diones and Pyridopyrimidine-diones with Anticancer Activity." JOURNAL OF ADVANCES IN CHEMISTRY 13, no. 2 (2017): 5959–76. http://dx.doi.org/10.24297/jac.v13i12.6043.

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An olomoucine analogues of 2-[(1-substituted)-2,6-dioxo-2,3,6,7â€“tetrahydro-1H-purin-8-ylsulfanyl]-N-substituted acetamide 6a-g and 7a-g, 1-substituted-8-[2-(4-substituted phenyl)-2-oxoethylsulphanyl]-3,7-dihydro-1H-purine-2,6-diones 9a-g and 10a-g, 3-(2-substituted benzyl)-6-(4-substituted phenyl)-1H-thiazolo[2,3-f]purine-2,4-dione 11a-g and 12a-g and their isosteres 3-substituted benzyl-5-methyl-7-substituted-1H-pyrido[2,3-d]pyrimidine-2,4-dione 13a-c and 14a-c were designed and synthesized. The target compounds 11a-g and 12a-g were prepared by cyclodehydration of 9a-g and 10a-g in PPA, whi

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16

Khalaj, Mehdi, Mahboubeh Taherkhani, Leo Payen, and Axel Klein. "A Sulfonic Acid Polyvinyl Pyridinium Ionic Liquid Catalyzes the Multi-Component Synthesis of Spiro-indoline-3,5′-pyrano[2,3-d]-pyrimidines and -Pyrazines." Molecules 28, no. 9 (2023): 3663. http://dx.doi.org/10.3390/molecules28093663.

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A sulfonated poly-4-vinyl pyridinium (PVPy-IL-B-SO3H) containing an acidic pyridinium/HSO3− ionic liquid moiety was prepared and used as a catalyst for the three-component reaction of malononitrile with 1-alkylindoline-2,3-diones and 1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione or methyl 5-hydroxy-1H-pyrazole-3-carboxylate, leading to methyl 6′-amino-5′-cyano-2-oxo-2′H-spiro[indoline-3,4′-pyrano[2,3-c]pyrazole]-3′-carboxylates or -3,4′-pyrano[2,3-d]pyrimidine]-6′-carbonitrile derivatives under ultrasonic irradiation conditions. The solid catalyst allows easy separation, is cheap, produces hig

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17

Rigi, Fatemeh, and Hamid Reza Shaterian. "Silica Ammonium Acetate(SiO2-NH4OAc) Catalyzed Facial Synthesis of Dihydropyrazolo[4',3':5,6]Pyrano[2,3-d]Pyrimidine-5,7-Diones." Acta Chemica Iasi 26, no. 1 (2018): 45–58. http://dx.doi.org/10.2478/achi-2018-0004.

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Abstract Silica ammonium acetate (SiO2-NH4OAc) was applied as an inexpensive, practical and heterogeneous catalyst for the preparation of new and known dihydropyrazolo[4',3':5,6]pyrano[2,3-d]pyrimidine-5,7-diones via one-pot four-component reaction of hydrazine hydrate, ethyl acetoacetate aldehydes and barbituric acid/dimethyl barbituric acid under solvent-free conditions. Silica supported ammonium acetate (SiO2-NH4OAc) was prepared according to easy procedure under ambient condition. After completion of the reaction, the catalyst was separated by filtration and reused. So, recycling system, s

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18

Patel, A. J., and M. P. Patel. "ULTRASOUND PROMOTED L- PROLINE CATALYZED FACILE SYNTHESIS AND ANTIMICROBIAL EVALUATION OF 4H-CHROMENO[2,3-D] PYRIMIDINE DERIVATIVES INCORPORATED WITH QUINOLINE MOIETY." INDIAN DRUGS 54, no. 09 (2017): 16–23. http://dx.doi.org/10.53879/id.54.09.11091.

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A simple, straightforward synthesis of 5-(2-chloro-6-substitutedquinolin-3-yl)-2-(4-substitutedphenyl)-8,8- substituted-5,7,8,9-tetrahydro-4H-chromeno[2,3-d]pyrimidine-4,6(3H)-diones (4a-l) has been performed by ultrasound irradiation method. Targeted compounds (4a-l) prepared from reaction of intermediate 2-amino-4-(2-chloro-6-substituted quinolin-3-yl)-7,7-substituted-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3- carbonitrile 2, which is synthesized by one pot three components way using L-proline as green catalyst at room temperature, was further reacted with benzaldehyde derivatives in the same r

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19

Sharma, G., and R. Sharma. "Novel spiro[indoline-3,2′thiazolo[5,4-e]pyrimido[1,2-a] pyrimidine] derivatives as possible anti-dermatophytic and anti-candidiasis agent." Biomeditsinskaya Khimiya 70, no. 3 (2024): 180–86. http://dx.doi.org/10.18097/pbmc20247003180.

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A novel series of 5′-benzylidene-3′-phenylspiro[indoline-3,2′-thiazolidine]-2,4′(1H)-diones 6a-d and spiro[indoline-3,2′-thiazolo[5,4-e]pyrimido[1,2-a]pyrimidin]-2(1H)-one 9a-d derivatives have been synthesized. All the newly synthesized compounds were evaluated for antifungal and anti-candidiasis activity by using Disc Diffusion and Modified Microdilution methods. The antimicrobial experiments have shown that the synthesized compounds demonstrated broad-spectrum antifungal activity in vitro. Among them, compounds 9a-9d had stronger antifungal activity against Trichophyton rubrum, Trichophyton

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20

Tkachenko, Yu N., E. B. Tsupak, and A. F. Pozharskii. "Pyrrolopyrimidines. 2.* Synthesis and oxidative conversions of 5-amino-1,3-Dimethylpyrrolo[3, 2-d]pyrimidine-2, 4-diones." Chemistry of Heterocyclic Compounds 31, no. 8 (1995): 987–93. http://dx.doi.org/10.1007/bf01170327.

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21

Carroll, William A., Kevin B. Sippy, Timothy A. Esbenshade, Steven A. Buckner, Arthur A. Hancock та Michael D. Meyer. "Two Novel and Potent 3-[(o-Methoxyphenyl)piperazinylethyl]-5-phenylthieno[2,3-d]pyrimidine-2,4-diones Selective for the α1D Receptor". Bioorganic & Medicinal Chemistry Letters 11, № 9 (2001): 1119–21. http://dx.doi.org/10.1016/s0960-894x(01)00159-7.

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22

Naya, Shin-ichi, Takeshi Tokunaka, and Makoto Nitta. "Novel Synthesis and Oxidizing Ability of Tropylium Ions Annulated with Two 2,4-Dimethylfuro[2,3-d]pyrimidine-1(2H),3(4H)-diones." Journal of Organic Chemistry 69, no. 14 (2004): 4732–40. http://dx.doi.org/10.1021/jo049668c.

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23

Di Braccio, Mario, Giorgio Roma, Gian Carlo Grossi, and Giovanni Ciarallo. "1,2-fused pyrimidines. V. Synthesis of 1-alkyl or phenyl-2H-dipyrido-[1,2-a:2′,3′-d]pyrimidine-2,5(1H)-diones." Journal of Heterocyclic Chemistry 29, no. 1 (1992): 25–31. http://dx.doi.org/10.1002/jhet.5570290105.

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24

Camarasa, Marta, Christian Barnils, Raimon Puig de la Bellacasa, Jordi Teixidó, and José I. Borrell. "A new and practical method for the synthesis of 6-aryl-5,6-dihydropyrido[2,3- $$d$$ d ]pyrimidine-4,7(3 $$H$$ H ,8 $$H$$ H )-diones." Molecular Diversity 17, no. 3 (2013): 525–36. http://dx.doi.org/10.1007/s11030-013-9450-1.

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25

Carroll, William A., Kevin B. Sippy, Timothy A. Esbenshade, Steven A. Buckner, Arthur A. Hancock та Michael D. Meyer. "ChemInform Abstract: Two Novel and Potent 3-[(o-Methoxyphenyl)piperazinylethyl]-5-phenylthieno [2,3-d]pyrimidine-2,4-diones Selective for the α1D Receptor." ChemInform 32, № 32 (2010): no. http://dx.doi.org/10.1002/chin.200132162.

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26

Vlasov, S. V., T. P. Osolodchenko, S. M. Kovalenko, and V. P. Chernykh. "Synthesis and the antimicrobial activity of 5-methyl-6-(2-methyl-1,3-thiazol-4-yl)-3-phenylthieno[2,3-d]pyrimidine-2,4(1H,3H)-diones." Vìsnik farmacìï, no. 4(80) (December 1, 2014): 3–7. http://dx.doi.org/10.24959/nphj.14.1995.

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27

Gupta, Princy, Vineet Kumar, and Satya Paul. "Silica functionalized sulfonic acid catalyzed one-pot synthesis of 4,5,8a-triarylhex-ahydropyrimido[4,5-d]pyrimidine-2,7(1H,3 H)-diones under liquid phase catalysis." Journal of the Brazilian Chemical Society 21, no. 2 (2010): 349–54. http://dx.doi.org/10.1590/s0103-50532010000200022.

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28

GHOZLAN, Said Ahmed Soliman, Muhammed Aly RAMADAN, Amr Mohamed ABDELMONIEM, Ahmed H. M. ELWAHY, and Ismail Abdelshafy ABDELHAMID. "Bis(indoline-2,3-diones): versatile precursors for novel bis(spirooxindoles) incorporating 4$H$-chromene-3-carbonitrile and pyrano[2,3-$d$]pyrimidine-6-carbonitrile derivatives." TURKISH JOURNAL OF CHEMISTRY 41 (2017): 410–19. http://dx.doi.org/10.3906/kim-1609-42.

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DI BRACCIO, M., G. ROMA, G. C. GROSSI, and G. CIARALLO. "ChemInform Abstract: 1,2-Fused Pyrimidines. Part 5. Synthesis of 1-Alkyl or Phenyl-2H- dipyrido(1,2-a:2′,3′-d)pyrimidine-2,5(1H)-diones." ChemInform 23, no. 30 (2010): no. http://dx.doi.org/10.1002/chin.199230172.

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Dige, Nilam C., Prasad G. Mahajan, Ramdas K. Dhokale, Sarika M. Chinchkar, Mayuri V. Patil, and Dattaprasad M. Pore. "Novel Route for the Synthesis of 5-(4-Hydroxy-2-oxo-2H-chromen-3-yl)-1,3-dimethyl-1H-chromeno[2,3-d]pyrimidine-2,4(3H,5H)-diones." Organic Preparations and Procedures International 51, no. 6 (2019): 553–65. http://dx.doi.org/10.1080/00304948.2019.1677449.

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Vlasov, S. V., T. P. Osolodchenko, S. M. Kovalenko, and V. P. Chernykh. "Synthesis and the antimicrobial activity of 1-alkyl-5-methyl-3-phenyl-6-(5-phenyl-1,3,4-oxadiazol-2-yl)thieno[2,3-d]pyrimidine-2,4(1H,3H)-diones." Journal of Organic and Pharmaceutical Chemistry 13, no. 1(49) (2015): 20–24. http://dx.doi.org/10.24959/ophcj.15.816.

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Bratenko, M. K., M. M. Barus, and M. V. Vovk. "Polyfunctional Pyrazoles. 8*. Synthesis of 6-Alkyl-2-Aryl-2H-Pyrazolo[4,3-d]Pyrimidine-5,7(4H,6H)-Diones based on Ethyl 1-Aryl-4-Isocyanatopyrazole-3-Carboxylates." Chemistry of Heterocyclic Compounds 49, no. 9 (2013): 1345–51. http://dx.doi.org/10.1007/s10593-013-1383-1.

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33

Nagamatsu, Tomohisa, and Rafiqul Islam. "Regioselective N- and O-Alkylation of 3H-[1,2,3]triazolo[4,5-d]pyrimidine-5,7(4H,6H)-diones (8-Azaxanthines) and Transformation of 3-Alkyl Derivatives into 1-Alkyl Isomers." HETEROCYCLES 68, no. 9 (2006): 1811. http://dx.doi.org/10.3987/com-06-10807.

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34

Furrer, H., R. Wagner, and H. W. Fehlhaber. "Conversion of 1-benzyl-4-aminotetrahydropyridine-3-carboxylic acid methyl ester to antithrombotic pyrido[4,3-d]pyrimidine-2,4-diones and to (2-oxotetrahydropyrimidin-4-ylidene)acetic acid methyl esters." Journal of Heterocyclic Chemistry 31, no. 6 (1994): 1569–75. http://dx.doi.org/10.1002/jhet.5570310649.

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35

Naya, Shin-ichi, Yohei Yamaguchi, and Makoto Nitta. "Synthesis and properties of 4,9-methanoundecafulvenes and their transformation to 3-substituted 7,12-methanocycloundeca[4,5]furo[2,3-d]pyrimidine-2,4(1H,3H)-diones: photo-induced autorecycling oxidizing reaction toward amines." Tetrahedron 61, no. 31 (2005): 7384–91. http://dx.doi.org/10.1016/j.tet.2005.05.069.

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36

FURRER, H., H. W. FEHLHABER, and R. WAGNER. "ChemInform Abstract: Conversion of 1-Benzyl-4-aminotetrahydropyridine-3-carboxylic Acid Methyl Ester to Antithrombotic Pyrido(4,3-d)pyrimidine-2,4-diones and to (2-Oxotetrahydropyrimidin-4-ylidene)acetic Acid Methyl Esters." ChemInform 26, no. 24 (2010): no. http://dx.doi.org/10.1002/chin.199524147.

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37

Tolkunov, V. S., A. B. Eresko, A. V. Mazepa, and S. V. Tolkunov. "Synthesis of 6-R-5-aryl-1,3-dioxo-1,2,3,4-tetrahydro-[1]benzothieno[3',2':4,5]pyrido[2,3-d]pyrimidin-5-ium salts and 6-R-5-aryl-5,6-dihydro[1]benzothieno-[3',2':4,5]pyrido[2,3-d]pyrimidine-1,3(2H,4H)-diones." Chemistry of Heterocyclic Compounds 49, no. 6 (2013): 941–48. http://dx.doi.org/10.1007/s10593-013-1329-7.

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38

Ramesh, Deepthi, Deblina Sarkar, Annu Joji, et al. "First‐in‐class pyrido[2,3‐ d ]pyrimidine‐2,4(1 H ,3 H )‐diones against leishmaniasis and tuberculosis: Rationale, in vitro, ex vivo studies and mechanistic insights." Archiv der Pharmazie 355, no. 4 (2022): 2100440. http://dx.doi.org/10.1002/ardp.202100440.

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39

Bratenko, M. K., M. M. Barus, and M. V. Vovk. "ChemInform Abstract: Polyfunctional Pyrazoles. Part 8. Synthesis of 6-Alkyl-2-aryl-2H-pyrazolo[4,3-d]pyrimidine-5,7(4H,6H)-diones (IV) Based on Ethyl 1-Aryl-4-isocyanatopyrazole-3-carboxylates (I)." ChemInform 45, no. 21 (2014): no. http://dx.doi.org/10.1002/chin.201421181.

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40

Tolkunov, V. S., A. B. Eresko, A. V. Mazepa, and S. V. Tolkunov. "ChemInform Abstract: Synthesis of 6-R-5-Aryl-1,3-dioxo-1,2,3,4-tetrahydro[1]benzothieno[3′,2′:4,5]pyrido [2,3-d]pyrimidin-5-ium Salts and 6-R-5-Aryl-5,6-dihydro[1]benzothieno[3′,2′:4,5]pyrido [2,3-d]pyrimidine-1,3(2H,4H)-diones." ChemInform 45, no. 12 (2014): no. http://dx.doi.org/10.1002/chin.201412164.

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41

Ramesh, Deepthi, Deblina Sarkar, Annu Joji, et al. "Erratum: First‐in‐class pyrido[2,3‐ d ]pyrimidine‐2,4(1 H ,3 H )‐diones against leishmaniasis and tuberculosis: Rationale, in vitro, ex vivo studies and mechanistic insights." Archiv der Pharmazie 355, no. 4 (2022): 2270007. http://dx.doi.org/10.1002/ardp.202270007.

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42

Nagamatsu, Tomohisa, and Rafiqul Islam. "Synthesis and Regioselective N- and O-Alkylation of 1H- or 3H-[1,2,3]Triazolo[4,5-d]pyrimidine-5,7(4H,6H)-diones (8-Azaxanthines) and Transformation of Their 3-Alkyl Derivatives into 1-Alkyl Isomers." Synthesis 2006, no. 24 (2006): 4167–79. http://dx.doi.org/10.1055/s-2006-950337.

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43

Majedi, Soma, Roya Karamian, and Seyed Hamed Moazzami Farida. "Synthesis of Novel Bioactive Candidates 4-Aryl-1H-indeno[1,2-d]pyrimidine-2,5-diones Using {[HMIM]C(NO2)3} as a Dual Rule Ionic Liquid Catalyst: An Experimental and Theoretical Evaluation of Their Corresponding Antioxidant Activities." Polycyclic Aromatic Compounds 40, no. 4 (2018): 1151–63. http://dx.doi.org/10.1080/10406638.2018.1533873.

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44

Bischoff, Kerstin, Ulrich Girreser, Dieter Heber, and Martin Schütt. "Two-Step Synthetic Approach to 6-Substituted Pyrido[2,3-d]pyrimidine(1H,3H)-2,4-diones from 6-Amino-, 6-Alkylamino-, and 6-Arylamino-1,3-dimethyluracils." Zeitschrift für Naturforschung B 61, no. 4 (2006): 486–94. http://dx.doi.org/10.1515/znb-2006-0415.

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The Mannich reaction of 7-aryl-5,6-dihydropyrido[2,3-d]pyrimidines 3, easily accessible by condensation of 6-amino-1,3-dimethyluracil (1) with Mannich bases 2a - c, gives rise to a mixture of 7-aryl-6-(N,N-dimethylaminomethyl)pyrido[2,3-d]pyrimidines 6 and 7 as well as 1,2-bis- (7-arylpyrido[2,3-d]pyrimidin-6-yl)ethane 13 the ratio of which depends on the reaction conditions and the amine used. 6-Alkylamino-1,3-dimethyluracils 15 - 18 were converted to the corresponding 5-(3-oxo-3-phenylpropyl)uracils 19 - 22 by condensation with the Mannich base 2a. Ring closure of 19 - 22 was performed by Vi

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45

Makarova, E. S., M. V. Kabanova, S. I. Filimonov, A. A. Shetnev, and K. Yu Suponitsky. "Synthesis of substituted hexahydro-2H-chromeno[4,3-d]pyrimidine-2,5-diones and their modification at the hydroxy group." Russian Chemical Bulletin 71, no. 5 (2022): 1034–42. http://dx.doi.org/10.1007/s11172-022-3505-3.

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46

M.Heravi, Majid, and Mansoureh Daraie. "Molecular diversity of four-component synthesis of pyrazole-based pyrido[2,3-d]pyrimidine-diones in water: a green synthesis." March 8, 2016. https://doi.org/10.3998/ark.5550190.p009.603.

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A novel one pot, four component synthesis of pyrazolo[4′,3′:5,6]pyrido[2,3-d]pyrimidine-diones, involving, hydrazine hydrate, ethyl acetoacetate, 6-amino-1,3-dimethyl uracil and an appropriate aryl aldehyde in the presence of two green catalysts in water, is reported.

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47

Zhang, Wen-Wen, Shao-Ting Gan, Zhao-Yi Qin, et al. "DABCO‐Promoted Bicyclization/Rearrangement Reaction Synthesis of Tetrasubstituted Furans and Furo[3,4‐d]pyrimidine‐2,4‐diones from 1,4‐Enediones." European Journal of Organic Chemistry, October 10, 2023. http://dx.doi.org/10.1002/ejoc.202300810.

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A DABCO‐promoted bicyclization/rearrangement reaction has been developed for the synthesis of tetrasubstituted furans from 1,4‐enediones at room temperature. This transformation involves aza‐Michael addition, intramolecular bicyclization, and rearrangement processes. In addition, the 4‐ureidofuran‐3‐carboxylate ester products can further be converted to furo[3,4‐d]pyrimidine‐2,4‐diones through intramolecular substitution cyclization under heating conditions.

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48

Saoud, M., F. B. Benabdelouahab, and F. El Guemmout. "Convenient Synthesis of 3-(l-carboxyalkyl)pyrido[2,3- d]pyrimidine-2,4-diones." Heterocyclic Communications 7, no. 5 (2001). http://dx.doi.org/10.1515/hc.2001.7.5.439.

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49

Abass, Mohamed, Mostafa Ismail, Wafaa Abdel-Monem та Aisha Mayas. "Substituted pyridopyrimidinones. Part 5. Behavior of 2-hydroxy-4-oxo-4H-pyrido[1,2-α]pyrimidine-3-carbaldehyde in nucleophilic condensation reactions". Chemical Papers 64, № 1 (2010). http://dx.doi.org/10.2478/s11696-009-0100-0.

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AbstractReactivity of 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (I) towards N- and C-nucleophiles was described. A series of new enaminones II–III, Schiff’s base IV, and hydrazinomethylenediketones V–VIII and X were prepared in good yields. Cyclization of compounds X was achieved by an action of acetic acid to give pyrazolo[3,4-d]pyrido[1,2-a]pyrimidines XI. Base catalyzed Knoevenagel condensation of aldehyde I with some active methyl and methylene compounds led to a series of chalcone-like derivatives XII, XV, XVII, XX, XXIII, XXV, XXVII, XXIX, XXXI, XXXII, and XXXV, in fair y

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50

Mamouni, R., M. Akssira, M. Aadil, A. Elhakmaoui, J. Lasri, and E. Zaballos-Garcia. "A Facile Synthesis of New 3-Substituted-2,3-dihydropyrido[3,2-d]pyrimidine-2,4-diones." ChemInform 35, no. 17 (2004). http://dx.doi.org/10.1002/chin.200417151.

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