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Journal articles on the topic 'PYRIDO[2,3- d]PYRIMIDINE'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Sirakanyan, Spinelli, Geronikaki, et al. "Synthesis, Antitumor Activity, and Docking Analysis of New Pyrido[3’,2’:4,5]furo(thieno)[3,2-d]pyrimidin-8-amines." Molecules 24, no. 21 (2019): 3952. http://dx.doi.org/10.3390/molecules24213952.

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Continuing our research in the field of new heterocyclic compounds, herein we report on the synthesis and antitumor activity of new amino derivatives of pyrido[3’,2’:4,5](furo)thieno[3,2-d]pyrimidines as well as of two new heterocyclic systems: furo[2–e]imidazo[1,2-c]pyrimidine and furo[2,3-e]pyrimido[1,2-c]pyrimidine. Thus, by refluxing the 8-chloro derivatives of pyrido[3’,2’:4,5]thieno(furo)[3,2-d]pyrimidines with various amines, the relevant pyrido[3’,2’:4,5]thieno(furo)[3,2-d]pyrimidin-8-amines were obtained. Further, the cyclization of some amines under the action of phosphorus oxychlori

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2

Friary, Richard, Andrew T. McPhail, and Vera Seidl. "Novel Syntheses of Tricyclic, N-Aryl, Pyridine- and Pyrazine-Fused Pyrimidones." Collection of Czechoslovak Chemical Communications 58, no. 5 (1993): 1133–50. http://dx.doi.org/10.1135/cccc19931133.

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2-methylthio-2-imidazoline and 2-methylthio-1,4,5,6-tetrahydro-2-pyrimidine amidated 2-chloro-3-pyridine- and 2-chloro-3-pyrazinecarbonyl chlorides. The products reacted with aromatic amines forming a series of tricyclic, linearly fused N-aryl pyrimidones. Included among these pyrimidones were 10-aryl-2,3-dihydroimidazo[1,2-a]pyrido[2,3-d]pyrimidin-5(10H)-ones, 11-aryl-2,3,4,11-tetrahydropyrido-[2,3-d]pyrimido[1,2-a]pyrimidin-6(6H)-ones, 10-aryl-2,3-dihydroimidazo[1,2-a]pyrazino[2,3-d]pyrimidin-5(10H)-ones and 11-aryl-2,3,4,11-tetrahydropyrimido-[1,2-a]pyrazino[2,3-d]pyrimidin-6(6H)-ones. 4,5,

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3

Tiwari, Sangeeta, Ashok K. Yadav, and A. K. Mishra. "Some New Pyrido[2,3-d]pyridimines and their Nucleoside of Biological Importance." E-Journal of Chemistry 7, s1 (2010): S85—S92. http://dx.doi.org/10.1155/2010/812567.

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Chalcones (I) reacted with malanonitrile and ammonium acetate yielded 2-amino-3-cyano-4,6-disubstituted pyridines (II) in excellent yield. 4-Amino-5,7-disubstituted pyrido [2,3-d]pyrimidine-2(1H)-thiones (III), 4-amino-5,7-disubstituted pyrido[2,3-d]pyrimidines (IV) and 4-imino-3,5,7-trisubstituted pyrido[2,3-d]pyrimidin-2(1H)-ones (V) have been synthesized by the condensation of compound (II) with thiourea, formamide and arylisocynate respectively. The ribofuranosidesviz. 4-amino-5,7-disubstituted-1- [2',3',5'-tri-o-benzoyl-β,D-ribofuranosyl]pyrido[2,3-d]pyrimidine-2-(1H)-thiones (VI) and 4-i

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4

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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5

Abdel-Hafez, Shams H., Ragaa A. Ahmed, Mohamed A. Abdel-Azim, and Khairy M. Hassan. "Selenium containing Heterocycles: Part 1. Synthesis of Some New Substituted Pyrido[3′,2′:4,5]selenolo[3,2-d]pyrimidines and Related Fused Tetracyclic Systems." Journal of Chemical Research 2007, no. 10 (2007): 580–84. http://dx.doi.org/10.3184/030823407x25506.

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New series of selenolo[2,3- b]pyridine, pyrido[3′,2′:4,5]selenolo[3,2- d]pyrimidine, 7,8-dihydro-2,4-dimethylpyrrolo [1,2- a]pyrido[3′,2′:4,5]selenolo[3,2- d]pyrimidin-10(6 H)-one and 7,9-dimethylpyrido[3′,2′:4,5]selenolo[3,2- d][1,2,4] triazolo[4,3- c]pyrimidine derivatives were synthesised from 3-cyano-4,6-dimethylpyridine-2(1 H)-selenone (1). Spectroscopic (IR, 1H, MS) of the newly synthesised compounds are reported.

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6

Yang, Wen-Juan, Qiu Sun, Jing Sun, and Chao-Guo Yan. "Domino aza/oxa-hetero-Diels–Alder reaction for construction of novel spiro[pyrido[3′,2′:5,6]pyrano[2,3-d]pyrimidine-7,5′-pyrimidine]." Organic Chemistry Frontiers 5, no. 18 (2018): 2754–58. http://dx.doi.org/10.1039/c8qo00784e.

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The unprecedented reaction of α,β-unsaturated N-arylaldimines with two molecular 5-arylidene-1,3-dimethylbarbituric acids in methylene dichloride at room temperature afforded unique spiro[pyrido[3′,2′:5,6]pyrano[2,3-d]pyrimidine-7,5′-pyrimidines] in moderate to good yields and with high diastereoselectivity.

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7

Kordian, Marcus, Holger Feist, and Klaus Peseke. "Anellation and Ring Transformations of Push-pull-functionalized Deoxypyranosiduloses." Zeitschrift für Naturforschung B 64, no. 6 (2009): 676–82. http://dx.doi.org/10.1515/znb-2009-0613.

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Reaction of (E)-3-aminomethylene-α-D-erythro-hexopyranosid-2-ulose 5 with substituted 5- aminopyrazoles afforded the pyrano-anellated pyrazolo[1,5-a]pyrimidines 8. The treatment of the corresponding (E)-2-aminomethylene-α-D-erythro-hexopyranosid-3-ulose 6 with 5-aminopyrazoles and (benzimidazol-2-yl)acetonitrile yielded in a ring transformation process the D-erythronoyl-pyrazolo[ 1,5-a]pyrimidine-3-carbonic acid derivatives 10 and D-erythronoyl-pyrido[1,2-a]benzimidazole- 4-carbonitrile (12), respectively

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8

Bakhite, E. A., A. E. Abdel-Rahman, O. S. Mohamed, and E. A. Thabet. "synthesis of Some New Pyridothienopyrimidines and Related [1,2,4]Triazolopyridothienopyrimidines." Journal of Chemical Research 2003, no. 2 (2003): 58–59. http://dx.doi.org/10.3184/030823403103173156.

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4-Chloro-9-phenyl-7-(2-thienyl)pyrido[3′,2′:4,5]thieno[3,2- d]pyrimidine (5) and 3-amino-3,4-dihydro-4-imino-9-phenyl-7-(2-thienyl)pyrido[3′,2′:4,5]thieno[3,2- d]pyrimidine (19) were prepared and employed as precursors for synthesizing the fused-ring compounds of the title.

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9

Abdelhamid, Abdou O., and Sobhi M. Gomha. "Synthesis of New Pyrazolo[1,5-a]pyrimidine, Triazolo[4,3-a]pyrimidine Derivatives, and Thieno[2,3-b]pyridine Derivatives from Sodium 3-(5-Methyl-1-phenyl-1H-pyrazol-4-yl)-3-oxoprop-1-en-1-olate." Journal of Chemistry 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/327095.

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Condensation of sodium 3-oxo-3-(1-phenyl-1H-pyrazol-4-yl)prop-1-en-1-olate (2) with several heterocyclic amines, cyanoacetamide, cyanothioacetamide, and 2-cyanoacetohydrazide gives pyrazolo[1,5-a]pyrimidines (5a–d), pyrido[2′,3′:3,4]pyrazolo[1,5-a]pyrimidine (9), benzo[4,5]imidazo[1,2-a]pyrimidine (10), [1,2,4]triazolo[1,5-a]pyrimidine (11), and pyridine derivatives (12–14). Also, thieno[2,3-b]pyridines (15–18) were synthesized via pyridinethione (13) withα-halo ketones andα-halo ester. Structures of the newly synthesized compounds were elucidated by elemental analysis, spectral data, alternat

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10

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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11

Mahmoud, M. R., A. A. Shalaby, T. A. Gad, and A. A. El-Khamry. "A facile synthesis and heteroannulation of pyrido[2,3-d]pyrimidine and related heterocyclic systems." Journal of Chemical Research 2009, no. 10 (2009): 612–15. http://dx.doi.org/10.3184/030823409x12523324765777.

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7-Amino-1,2,3,4-tetrahydro-4-oxo-2-thioxo-5-(3,4,5-trimethoxyphenyl)pyrido[2,3- d]pyrimidine (1) was prepared and reacted with methyl iodide and ethyl chloroacetate to give the S-alkylated products 2 and 3, respectively. The reaction of 1 or 3 with hydrazine hydrate yielded the same 2-hydrazino derivative 4. Treatment of 4 with 2,4-pentanedione, 2-acetylcyclohexanone and ethyl acetoacetate afforded the corresponding pyrazolylpyrido[2,3- d]pyrimidine derivatives (5–7), while phthalic anhydride gave the phthalazinyl compound 8. Ethoxymethylenemalononitrile with the hydrazine 4 formed the fused 1

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12

Tang, Chu, Yongju Liang, Shun Bai, et al. "Synthesis and antiproliferative evaluation of novel tetrahydrobenzo[4′,5′]thieno[3′,2′:5,6]pyrido[4,3-d]pyrimidine derivatives." RSC Adv. 4, no. 55 (2014): 29187–92. http://dx.doi.org/10.1039/c4ra03535f.

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13

Sirakanyan, Samuel N., Victor G. Kartsev, Athina Geronikaki, et al. "Synthesis and Evaluation of Antimicrobial Activity and Molecular Dock - ing of New N-1,3-thiazol-2-ylacetamides of Condensed Pyrido[3',2':4,5] furo(thieno)[3,2-d]pyrimidines." Current Topics in Medicinal Chemistry 20, no. 24 (2020): 2192–209. http://dx.doi.org/10.2174/1568026620666200628145308.

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Background: From the literature it is known that many derivatives of fused thienopyrimidines and furopyrimidines possess broad spectrum of biological activity. Objectives: The current studies describe the synthesis and evaluation of antimicrobial activity of some new N-1,3-thiazol-2-ylacetamides of pyrido[3',2':4,5]furo(thieno)[3,2-d]pyrimidines. Methods: By cyclocondensation of ethyl 1-aminofuro(thieno)[2,3-b]pyridine-2-carboxylates 1with formamide were converted to the pyrido[3',2':4,5]furo(thieno)[3,2-d]pyrimidin-7(8)-ones 2.Alkylation of compound 2 with 2-chloro-N-1,3-thiazol-2-ylacetamide

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14

Bystryakova, I. D., N. M. Smirnova, and T. S. Safonova. "Pyrido[2,3-d]dipyrimidines 8. Synthesis of pyrrolo(2?,3??4,5)pyrido[2,3-d]pyrimidines." Chemistry of Heterocyclic Compounds 29, no. 6 (1993): 687–90. http://dx.doi.org/10.1007/bf00531548.

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15

Salerno, Silvia, Elisabetta Barresi, Aída Nelly García-Argáez, et al. "Discovery of Pyrido[3′,2′:5,6]thiopyrano[4,3-d]pyrimidine-Based Antiproliferative Multikinase Inhibitors." ACS Medicinal Chemistry Letters 10, no. 4 (2019): 457–62. http://dx.doi.org/10.1021/acsmedchemlett.8b00499.

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16

Yakovlev, M. Yu, A. V. Kadushkin, and V. G. Granik. "Synthesis of pyrido[3′,2′:4,5]pyrrolo-and pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine derivatives using the thorpe-ziegler cyclization reaction." Pharmaceutical Chemistry Journal 31, no. 7 (1997): 350–53. http://dx.doi.org/10.1007/bf02464367.

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17

BISTRYAKOVA, I. D., N. M. SMIRNOVA, and T. S. SAFONOVA. "ChemInform Abstract: Pyrido(2,3-d)pyrimidines. Part 8. Synthesis of Pyrrolo(2′,3′:4,5) pyrido(2,3-d)pyrimidines." ChemInform 25, no. 15 (2010): no. http://dx.doi.org/10.1002/chin.199415204.

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18

Van Tinh, Dang, and Wolfgang Stadlbauer. "Ring closure reactions of pyrido[2,3-d]pyrimidines to pyrano[2′,3′:4,5]- and oxazolo[5′,4′:4,5]pyrido[2,3-d]pyrimidines." Journal of Heterocyclic Chemistry 45, no. 5 (2008): 1359–64. http://dx.doi.org/10.1002/jhet.5570450517.

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19

Elian, Mohamed, Ibrahim AbdelHafiz, and Mohamed AbdElReheim. "PYRIMIDINETHIONES AS BUILDING BLOCKS IN HETEROCYCLIC SYNTHESIS: SYNTHESIS OF PYRANO[2,3-D]PYRIMIDINE, CHROMENO[2,3-D]PYRIMIDINE, PYRIDO[3',2':5,6]PYRANO[2,3-B]PYRIDINE AND PYRIMIDO[5',4':5,6]PYRANO[2,3-D]PYRIMIDINE." Sinai Journal of Applied Sciences 3, no. 2 (2014): 51–62. http://dx.doi.org/10.21608/sinjas.2014.78457.

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20

Firoozpour, Loghman, Hoda Yahyavi, Ramona Ejtemaei, Setareh Moghimi, and Alireza Foroumadi. "A One-Pot, Three-Component, Solvent-Free Synthesis of Novel 6H-Chromeno[3’,4’:5,6]Pyrido[2,3-d]Pyrimidine-Triones under Microwave Irradiation." Journal of Chemical Research 42, no. 12 (2018): 604–7. http://dx.doi.org/10.3184/174751918x15414289771620.

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A green and efficient method for preparing novel heterocyclic systems is established through the reaction of differently substituted benzaldehydes, barbituric acid and 4-amino-2H-chromene-2-one under solvent-free conditions. This method affords 6H-chromeno[3’,4’:5,6] pyrido[2,3-d]pyrimidine-trione derivatives in high yields and short reaction times.

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21

Troschütz, Reinhard. "Darstellung von Pyrido[2, 3-d]pyrimidinen mit Trimethoprim-Partialstruktur." Archiv der Pharmazie 322, no. 5 (1989): 285–90. http://dx.doi.org/10.1002/ardp.19893220509.

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22

Nasr, Magda N., and Magdy M. Gineinah. "Pyrido [2, 3-d]pyrimidines and Pyrimido[5′, 4′:5, 6]pyrido[2, 3-d]pyrimidines as New Antiviral Agents: Synthesis and Biological Activity." Archiv der Pharmazie 335, no. 6 (2002): 289. http://dx.doi.org/10.1002/1521-4184(200208)335:6<289::aid-ardp289>3.0.co;2-z.

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23

Peinador, Carlos, María J. Moreira, and José Ma Quintela. "An efficient iminophosphorane-mediated synthesis for pyrido[3′,2′:4,5]thieno[3,2-d] pyrimidine derivatives." Tetrahedron 50, no. 22 (1994): 6705–14. http://dx.doi.org/10.1016/s0040-4020(01)89699-x.

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24

Ho, Yuh-Wen. "Synthesis of Some New Pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidin-4(3H)-Ones and Pyrido[3′,2′: 4,5]thieno[2,3-e]-1,2,4-triazolo[1,5-c]pyrimidine Derivatives." Journal of the Chinese Chemical Society 48, no. 6B (2001): 1163–74. http://dx.doi.org/10.1002/jccs.200100172.

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25

Marchalín, Štefan, Františka Pavlíková, and Dušan Ilavský. "Synthesis and spectral properties of pyrrolo[3',4':5,6]-4H-pyrano[2,3-d]pyrimidine derivatives." Collection of Czechoslovak Chemical Communications 54, no. 5 (1989): 1336–45. http://dx.doi.org/10.1135/cccc19891336.

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The starting 2-amino-5-ethoxycarbonyl-6-chloromethyl-4-(2-furyl)-3-cyano-4H-pyran (I) afforded on condensation with triethoxymethane 2-ethoxymethylenamino-4H-pyran II; treatment of the latter with ammonia yielded 2-formamidino-3-cyano-4H-pyran III, which, when heated in dilute ethanol, cyclized to 4-amino-6-ethoxycarbonyl-5-(2-furyl)-7-chloromethyl-4H-pyrano[2,3-d]pyrimidine (IV). Compound IV reacted with alkyl- or arylamines to give substituted 5H,6H,8H-pyrrolo[3',4':5,6]-4H-pyrano[2,3-d]pyrimidines VI, one of which (VIb, R = p-CH3C6H4) was alternatively obtained from 2-formamidino-4H-pyrano

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26

Sanad, Sherif M. H., Mahmoud A. E. Hawass, Ahmed A. M. Ahmed, and Mohamed A. A. Elneairy. "Facile synthesis and characterization of novel pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidin-4(3H)-one and pyrido[2′,3′:3,4]pyrazolo[1,5-a]pyrimidine incorporating 1,3-diarylpyrazole moiety." Synthetic Communications 48, no. 14 (2018): 1847–56. http://dx.doi.org/10.1080/00397911.2018.1468911.

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27

Elneairy, Mohamed A. A. "Cyanothioacetamide in Heterocyclic Synthesis: A Novel Synthesis of Styrylpyridinethione, Styrylthieno[2,3-b]pyridine, Styrylpyrazolo[3,4-b]pyridine, Pyrido[2′,3′:3,4]pyrazolo[5,1-a]pyrimidine, Pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine and Pyrido[3′,2′:4,5]thieno[3,2-d]-1,2,3-triazin-4-one Derivatives." Phosphorus, Sulfur, and Silicon and the Related Elements 178, no. 10 (2003): 2201–14. http://dx.doi.org/10.1080/713744557.

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28

Bakhite, Etify A., Abdu E. Abdel-Rahman, and Elham A. Al-Taifi. "SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF SOME NEW PYRIDO[3′,2′:4,5]THIENO[3,2-d]- PYRIMIDINE DERIVATIVES." Phosphorus, Sulfur, and Silicon and the Related Elements 179, no. 3 (2004): 513–20. http://dx.doi.org/10.1080/10426500490422155.

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29

Naresh Kumar, R., G. Malla Reddy, P. Nagendar, et al. "Synthesis of Novel Pyrido[3′,2′:4,5]furo[3,2-d]pyrimidine Derivatives and Their Cytotoxic Activity." Journal of Heterocyclic Chemistry 51, no. 5 (2014): 1531–35. http://dx.doi.org/10.1002/jhet.1833.

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30

Dabaeva, V. V., M. R. Bagdasaryan, A. S. Noravyan, I. A. Dzhagatspanyan, I. N. Nazaryan, and A. G. Akopyan. "Synthesis and neurotropic activity of new condensed pyrido[3',2':4,5]thieno[3,2-d]pyrimidine derivatives." Pharmaceutical Chemistry Journal 46, no. 5 (2012): 271–73. http://dx.doi.org/10.1007/s11094-012-0778-0.

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31

Dabaeva, V. V., M. R. Bagdasaryan, A. S. Noravyan, I. M. Nazaryan, A. G. Akopyan, and A. A. Tadevosyan. "Synthesis and Neurotropic Activity of New Condensed Pyrido[3′,2′:4,5]furo[3,2-d]-pyrimidine Derivatives." Pharmaceutical Chemistry Journal 47, no. 3 (2013): 135–38. http://dx.doi.org/10.1007/s11094-013-0911-8.

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32

SIRAKANYAN, SAMVEL N., ATHINA GERONIKAKI, DOMENICO SPINELLI, et al. "Synthesis and antimicrobial activity of new amino derivatives of pyrano[4’’,3’’:4’,5’]pyrido[3’,2’:4,5]thieno[3,2-d]pyrimidine." Anais da Academia Brasileira de Ciências 90, no. 1 suppl 2 (2018): 1043–57. http://dx.doi.org/10.1590/0001-3765201820170798.

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33

Gomha, Sobhi, Ikhlass Abbas, Mohamed Elneairy, Mahmoud Elaasser, and Bazada Mabrouk. "Antimicrobial and anticancer evaluation of a novel synthetic tetracyclic system obtained by Dimroth rearrangement." Journal of the Serbian Chemical Society 80, no. 10 (2015): 1251–64. http://dx.doi.org/10.2298/jsc141222022g.

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A series of pyrido[3',2':4,5]thieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidines were prepared via oxidative cyclization of 4-(2-arylidenehydrazinyl)pyrido [3',2':4,5]thieno[3,2-d] pyrimidines. Dimroth rearrangement of such a series yielded pyrido[3',2':4,5]thieno[2,3-e][1,2,4]triazolo[1,5-c]pyrimidines. The reaction mechanism was proposed and the products were screened for their antimicrobial and anticancer activities. From the antimicrobial screening results, it can be seen that compounds 8c, 9f and 10c showed excellent activity against gram positive bacteria while compounds 10d and 8c showed the

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34

Khattab, Ahmed F., Magdy A. Zahran, and Ahmed Saif. "Simple Analogues of Acyclonucleosides: Synthesis of N‐Substituted Pyrido[3′,2′:4,5]thieno[3,2‐d]pyrimidine Derivatives." Synthetic Communications 36, no. 19 (2006): 2751–61. http://dx.doi.org/10.1080/00397910600767181.

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35

PEINADOR, C., M. J. MOREIRA, and J. M. QUINTELA. "ChemInform Abstract: An Efficient Iminophosphorane-Mediated Synthesis for Pyrido(3′,2′:4,5) thieno(3,2-d)pyrimidine Derivatives." ChemInform 25, no. 41 (2010): no. http://dx.doi.org/10.1002/chin.199441145.

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Abba, Chiranjeevi, Naveen Puram, and Sailu Betala. "Synthesis of Novel Amide Functionalized Pyrido[2,3-d]pyrimidine Derivatives and their Anticancer Activity." Asian Journal of Chemistry 33, no. 7 (2021): 1579–84. http://dx.doi.org/10.14233/ajchem.2021.23225.

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A series of novel amide functionalized pyrido[2,3-d]pyrimidine derivatives were synthesized from 2-amino-6-(thiophen-2-yl)-4-(trifluoro-methyl)nicotinonitrile (1), which on reaction with trifluoroacetic acid to get pyridopyrimidine (2). Compound 2 when treated with bromoethyl acetate followed by hydrazine hydrate to get hydrazide derivatives 4. Compound 4 on reaction with different substituted aromatic aldehydes to obtain Schiff base derivatives 5a-f. In another way, compound 3 treated with different substituted amines and amino acids to obtain amide derivatives 6a-f, 7a-d and 8a-c. All the co

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Ma, Xingling, Lei Liu, Na Cao, Qiaogen Zou, Kaihe Xiong, and Pingkai Ouyang. "Isolation and Structural Elucidation of Palbociclib’s Eight Process-Related Impurities: Two Identified as New Compounds." Journal of AOAC INTERNATIONAL 99, no. 3 (2016): 638–48. http://dx.doi.org/10.5740/jaoacint.15-0251.

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Abstract Palbociclib is the first U.S. Food and Drug Administration-approved cyclin-dependent kinase inhibitor indicated in combination with letrozole for the treatment of breast cancer. Development of a selective method for the determination of any impurities contained in this drug is significantly important to ensure the quality and safety of palbociclib. In this study, a reliable reversed-phase HPLC method for the separation and determination of eight potential impurities was developed and validated. The structures of two new compounds and six other process-related impurities were character

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Abdel-rahman, A. E., E. A. Bakhite, O. S. Mohamed, and E. A. Thabet. "SYNTHESIS OF SOME NEW THIENO[2,3-b]PYRIDINES, PYRIDO[3′,2′:4,5]-THIENO[3,2-d]PYRIMIDINES AND PYRIDO[3′,2′:4,5]THIENO[3,2-d][1,2,3]-TRIAZINES." Phosphorus, Sulfur, and Silicon and the Related Elements 166, no. 1 (2000): 149–71. http://dx.doi.org/10.1080/10426500008076538.

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Roknabadi, Mohammad Hakimi, Mohammad Hossein Mosslemin, and Razieh Mohebat. "Efficient synthesis of a novel series of indeno-fused pyrido[2,3-d]pyrimidines using a deep eutectic solvent system comprised of choline chloride/urea." Journal of Chemical Research 41, no. 7 (2017): 430–33. http://dx.doi.org/10.3184/175815517x14981249895596.

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A series of 13 aryl indeno[2′,1′:5,6]pyrido[2,3- d]pyrimidine-2,4,6-(3 H,5 H,11 H)-triones, eight of which are new, were synthesised regioselectively in high yields by a three-component reaction of 1,3-indanedione, an araldehyde and 6-aminopyrimidin-2,4(1 H,3 H)-dione in the presence of a deep eutectic solvent comprised of choline chloride/urea (1:2) as the catalyst. The reaction conditions were mild and did not require additional catalysts. Given the inexpensive, nontoxic and recyclable nature of the deep eutectic solvent, these reaction conditions are simple to carry out and environmentally

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Veselovská, Lucia, Radek Pohl, Eva Tloušt′ová, et al. "Pyrido-Fused Deazapurine Bases: Synthesis and Glycosylation of 4-Substituted 9H-Pyrido[2′,3′:4,5]- and Pyrido[4′,3′:4,5]pyrrolo[2,3-d]pyrimidines." ACS Omega 5, no. 40 (2020): 26278–86. http://dx.doi.org/10.1021/acsomega.0c04302.

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41

Khattab, Ahmed F., and Farag A. El-Essawy. "Formation of Novel Pyrido[3′,2′:4,5]Thieno [2,3-e][1,2,4]Triazolo[4,3-c] Pyrimidines and their Acyclic C-Nucleosides Analogues: Synthesis of 3-(Alditol-1-yl)Pyridothienotriazolopyrimidines." Journal of Chemical Research 2005, no. 11 (2005): 736–40. http://dx.doi.org/10.3184/030823405774909298.

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A series of the hydrazones were prepared by the reaction of 4-hydrazino-7,9-dimethylpyrido[3′,2′:4,5]thieno [2,3-d]pyrimidine (1) with monosaccharides, and their acetylation was studied. The oxidative cyclisation of the hydrazones 3a–c gave 3-(Alditol-1-yl)-pyridothienotriazolopyrimidenes 5a–c, whose acetylation was carried out. Also, oxidative cyclisation of arylidenes 7a,b gave the pyridothienotriazolopyrimidines 8a,b.

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Ahmed, E. Kh, A. M. N. Gohar, and M. A. Ameen. "ChemInform Abstract: Synthesis of New Pyrido[4′,3′:4,5]thieno[2,3-d]-1,2,4-triazolo[3,4-c]pyrimidines and a 5,6-Dihydro-1,2,4-triazolo[4′′,3′′:1′,2′]pyrido[4′,3′:4,5]thieno [2,3-d]pyrimidine Ring System." ChemInform 31, no. 20 (2010): no. http://dx.doi.org/10.1002/chin.200020129.

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Al-Omran, Fatima, and Adel A. El-Khair. "Synthesis of novel thieno[2,3-b][1,6]naphthyridine and thieno[2‘,3‘: 2,3]pyrido[4,5-d]pyrimidine derivatives." Journal of Chemical Research 2007, no. 1 (2007): 52–55. http://dx.doi.org/10.3184/030823407780199658.

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Paronikyan, E. G., and Sh Sh Dashyan. "Synthesis of Cyclopenta[4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine Derivatives. Dimroth Rearrangement of Triazolopyrimidines." Russian Journal of General Chemistry 88, no. 8 (2018): 1623–28. http://dx.doi.org/10.1134/s1070363218080121.

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Dyachenko, I. V., V. D. Dyachenko, P. V. Dorovatovsky, V. N. Khrustalev, and V. G. Nenajdenko. "One-Pot Synthesis of Thieno[2,3-b]pyridine and Pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine Derivatives." Russian Journal of Organic Chemistry 56, no. 6 (2020): 974–82. http://dx.doi.org/10.1134/s1070428020060020.

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Kh. Ahmed, Essam, and Mohamed A. Ameen. "Synthesis of thiopyrano[4″,3″:4′,5′]pyrido[3′,2′:4,5]furo[3,2-d]pyrimidines." Chinese Chemical Letters 21, no. 6 (2010): 669–73. http://dx.doi.org/10.1016/j.cclet.2009.12.010.

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Abdel-Mohsen, Shawkat A., and Ahmed A. Geies. "Synthesis of pyrido[2‘,3‘:4,5]thieno[2,3-d]pyrimidines through Friedländer reactions." Journal of Chemical Research 2007, no. 12 (2007): 689–92. http://dx.doi.org/10.3184/030823407x269961.

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Abdel Fattah, Azza M., Mohamed A. A. Elneairy, and Mohamed A. M. Gad-Elkareem. "A Novel Synthesis of Pyridine-2(1H)-thione, Pyrazolo[3,4-b]pyridine, Pyrido[2′,3′:3,4]pyrazolo[1,5-a]pyrimidine, Thieno[2,3-b]pyrdine, and Pyrido[3′,2′:4,5]thieno[3,2-d]pyrimidine Derivatives Containing a Naphthyl Moiety." Phosphorus, Sulfur, and Silicon and the Related Elements 182, no. 6 (2007): 1351–64. http://dx.doi.org/10.1080/10426500601160991.

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Taylor, Edward C., Joseph L. Pont, and John C. Warner. "Synthesis of 2-amino-6,7-dihydrothieno-[3′,2′:5,6]pyrido[2,3-d]pyrimidin-4-one." Journal of Heterocyclic Chemistry 25, no. 6 (1988): 1733–35. http://dx.doi.org/10.1002/jhet.5570250624.

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Dabaeva, V. V., M. R. Bagdasaryan, and A. S. Noravyan. "Synthesis of new condensed derivatives of pyrano[4,3-b]thieno[3,2-e]pyridine and pyrido[3',2':4,5]thieno[3,2-d]pyrimidine." Chemistry of Heterocyclic Compounds 47, no. 5 (2011): 639–43. http://dx.doi.org/10.1007/s10593-011-0810-4.

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