Pyrimidines

A Structure-Guided Approach to Creating Covalent FGFR Inhibitors was written by Zhou, Wenjun;Hur, Wooyoung;McDermott, Ultan;Dutt, Amit;Xian, Wa;Ficarro, Scott B.;Zhang, Jianming;Sharma, Sreenath V.;Brugge, Joan;Meyerson, Matthew;Settleman, Jeffrey;Gray, Nathanael S.. And the article was included in Chemistry & Biology (Cambridge, MA, United States) in 2010.Category: pyrimidines The following contents are mentioned in the article:

Summary: The fibroblast growth factor receptor tyrosine kinases (FGFR1, 2, 3, and 4) represent promising therapeutic targets in a number of cancers. We have developed the first potent and selective irreversible inhibitor of FGFR1, 2, 3, and 4, which we named FIIN-1 that forms a covalent bond with cysteine 486 located in the P loop of the FGFR1 ATP binding site. We demonstrated that the inhibitor potently inhibits Tel-FGFR1-transformed Ba/F3 cells (EC₅₀ = 14 nM) as well as numerous FGFR-dependent cancer cell lines. A biotin-derivatized version of the inhibitor, FIIN-1-biotin, was shown to covalently label FGFR1 at Cys486. FIIN-1 is a useful probe of FGFR-dependent cellular phenomena and may provide a starting point of the development of therapeutically relevant irreversible inhibitors of wild-type and drug-resistant forms of FGFR kinases. This study involved multiple reactions and reactants, such as 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7Category: pyrimidines).

1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7) belongs to pyrimidine derivatives. Pyrimidine is an aromatic heterocyclic organic compound similar to pyridine. Pyrimidine derivatives also play an important role in drug development, either in concert with other compounds or on their own.Category: pyrimidines

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Osmometric studies on self-association of pyrimidines in aqueous solutions: evidence for involvement of hydrophobic interactions was written by Plesiewicz, Ewa;Stepien, Elzbieta;Bolewska, Krystyna;Wierzchowski, K. L.. And the article was included in Biophysical Chemistry in 1976.HPLC of Formula: 39513-47-8 The following contents are mentioned in the article:

Vapor pressure osmometric studies were performed on stacking self-association of 25 uracil derivatives variously C- and N-substituted with polar and alkyl groups in aqueous solution at various temperatures The respective equilibrium association constants KSt were computed on the assumption of the isodesmic model of self-association Enthalpies of association for most of the compounds studied were obtained from the temperature-dependence of KSt, according to the van’t Hoff equation. Anal. of the equilibrium and thermodn. parameters in terms of the association mechanism demonstrated the involvement of classical hydrophobic interactions in the stabilization of complexes of di- and higher alkylated uracils. Data for the derivatives substituted with polar groups proved consistent with the predominant involvement of dipole-induced dipole forces in the association This study involved multiple reactions and reactants, such as Ethyl 1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (cas: 39513-47-8HPLC of Formula: 39513-47-8).

Ethyl 1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (cas: 39513-47-8) belongs to pyrimidine derivatives. Pyrimidine also found in many synthetic compounds such as barbiturates and the HIV drug, zidovudine. We all know its importance to life – pyrimidine and purine bases are included in the structure of DNA and RNA.HPLC of Formula: 39513-47-8

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

8-Substituted Pyrido[3,4-d]pyrimidin-4(3H)-one Derivatives As Potent, Cell Permeable, KDM4 (JMJD2) and KDM5 (JARID1) Histone Lysine Demethylase Inhibitors was written by Bavetsias, Vassilios;Lanigan, Rachel M.;Ruda, Gian Filippo;Atrash, Butrus;McLaughlin, Mark G.;Tumber, Anthony;Mok, N. Yi;Le Bihan, Yann-Vai;Dempster, Sally;Boxall, Katherine J.;Jeganathan, Fiona;Hatch, Stephanie B.;Savitsky, Pavel;Velupillai, Srikannathasan;Krojer, Tobias;England, Katherine S.;Sejberg, Jimmy;Thai, Ching;Donovan, Adam;Pal, Akos;Scozzafava, Giuseppe;Bennett, James M.;Kawamura, Akane;Johansson, Catrine;Szykowska, Aleksandra;Gileadi, Carina;Burgess-Brown, Nicola A.;von Delft, Frank;Oppermann, Udo;Walters, Zoe;Shipley, Janet;Raynaud, Florence I.;Westaway, Susan M.;Prinjha, Rab K.;Fedorov, Oleg;Burke, Rosemary;Schofield, Christopher J.;Westwood, Isaac M.;Bountra, Chas;Muller, Susanne;van Montfort, Rob L. M.;Brennan, Paul E.;Blagg, Julian. And the article was included in Journal of Medicinal Chemistry in 2016.Quality Control of 3-((2-(Pyridin-2-yl)-6-(1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)pyrimidin-4-yl)amino)propanoic acid The following contents are mentioned in the article:

We report the discovery of N-substituted 4-(pyridin-2-yl)thiazole-2-amine derivatives and their subsequent optimization, guided by structure-based design, to give 8-(1H-pyrazol-3-yl)pyrido[3,4-d]pyrimidin-4(3H)-ones, a series of potent JmjC histone N-Me lysine demethylase (KDM) inhibitors which bind to Fe(II) in the active site. Substitution from C4 of the pyrazole moiety allows access to the histone peptide substrate binding site; incorporation of a conformationally constrained 4-phenylpiperidine linker gives derivatives such as 54j and 54k which demonstrate equipotent activity vs. the KDM4 (JMJD2) and KDM5 (JARID1) subfamily demethylases, selectivity over representative exemplars of the KDM2, KDM3, and KDM6 subfamilies, cellular permeability in the Caco-2 assay, and, for 54k, inhibition of H3K9Me₃ and H3K4Me₃ demethylation in a cell-based assay. This study involved multiple reactions and reactants, such as 3-((2-(Pyridin-2-yl)-6-(1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)pyrimidin-4-yl)amino)propanoic acid (cas: 1373422-53-7Quality Control of 3-((2-(Pyridin-2-yl)-6-(1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)pyrimidin-4-yl)amino)propanoic acid).

3-((2-(Pyridin-2-yl)-6-(1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)pyrimidin-4-yl)amino)propanoic acid (cas: 1373422-53-7) belongs to pyrimidine derivatives. Pyrimidines are isomeric with two other forms of diazines: pyridazine, with the nitrogen atoms in the 1 and 2 positions; and pyrazine, with the nitrogen atoms in the 1 and 4 positions. We all know its importance to life – pyrimidine and purine bases are included in the structure of DNA and RNA.Quality Control of 3-((2-(Pyridin-2-yl)-6-(1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)pyrimidin-4-yl)amino)propanoic acid

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Relief of Profound Feedback Inhibition of Mitogenic Signaling by RAF Inhibitors Attenuates Their Activity in BRAFV600E Melanomas was written by Lito, Piro;Pratilas, Christine A.;Joseph, Eric W.;Tadi, Madhavi;Halilovic, Ensar;Zubrowski, Matthew;Huang, Alan;Wong, Wai Lin;Callahan, Margaret K.;Merghoub, Taha;Wolchok, Jedd D.;de Stanchina, Elisa;Chandarlapaty, Sarat;Poulikakos, Poulikos I.;Fagin, James A.;Rosen, Neal. And the article was included in Cancer Cell in 2012.Safety of 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea The following contents are mentioned in the article:

BRAF^V600E drives tumors by dysregulating ERK signaling. In these tumors, we show that high levels of ERK-dependent neg. feedback potently suppress ligand-dependent mitogenic signaling and Ras function. BRAF^V600E activation is Ras independent and it signals as a RAF-inhibitor-sensitive monomer. RAF inhibitors potently inhibit RAF monomers and ERK signaling, causing relief of ERK-dependent feedback, reactivation of ligand-dependent signal transduction, increased Ras-GTP, and generation of RAF-inhibitor-resistant RAF dimers. This results in a rebound in ERK activity and culminates in a new steady state, wherein ERK signaling is elevated compared to its initial nadir after RAF inhibition. In this state, ERK signaling is RAF inhibitor resistant, and MEK inhibitor sensitive, and combined inhibition results in enhancement of ERK pathway inhibition and antitumor activity. This study involved multiple reactions and reactants, such as 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7Safety of 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea).

1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7) belongs to pyrimidine derivatives. The aromatic compound pyrimidine, and its derivatives, are ubiquitous in nature. They are found in nucleic acids, vitamins, amino acids, antibiotics, alkaloids, and a variety of toxins. As nucleotides in DNA and RNA, pyrimidine nucleotide derivatives have a wide range of biological applications. For example, pyrimidine derivatives are useful in DNA repair studies involving cancer and epigenetics.Safety of 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Kinetic Heterogeneity of Cancer Cell Fractional Killing was written by Inde, Zintis;Forcina, Giovanni C.;Denton, Kyle;Dixon, Scott J.. And the article was included in Cell Reports in 2020.Recommanded Product: 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea The following contents are mentioned in the article:

Lethal drugs can induce incomplete cell death in a population of cancer cells, a phenomenon referred to as fractional killing. Here, we show that high-throughput population-level time-lapse imaging can be used to quantify fractional killing in response to hundreds of different drug treatments in parallel. We find that stable intermediate levels of fractional killing are uncommon, with many drug treatments resulting in complete or near-complete eradication of all cells, if given enough time. The kinetics of fractional killing over time vary substantially as a function of drug, drug dose, and genetic background. At the mol. level, the antiapoptotic protein MCL1 is an important determinant of the kinetics of fractional killing in response to MAPK pathway inhibitors but not other lethal stimuli. These studies suggest that fractional killing is governed by diverse lethal stimulus-specific mechanisms. This study involved multiple reactions and reactants, such as 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7Recommanded Product: 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea).

1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7) belongs to pyrimidine derivatives. Pyrimidines are isomeric with two other forms of diazines: pyridazine, with the nitrogen atoms in the 1 and 2 positions; and pyrazine, with the nitrogen atoms in the 1 and 4 positions. A Cu-catalyzed and 4-HO-TEMPO-mediated [3 + 3] annulation of commercially available amidines with saturated ketones enables an efficient and facile synthesis of structurally important pyrimidines via a cascade reaction of oxidative dehydrogenation/annulation/oxidative aromatization.Recommanded Product: 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Tyrosine kinase inhibitory activity of dehydroabietylamine derivatives tested by homogeneous time-resolved fluorescence based high throughput screening model was written by Zhou, Tao-tao;He, Ling;Yan, Ming;Zhang, Lu-yong;He, Jian-guo;Rao, Xiao-ping. And the article was included in Zhongguo Tianran Yaowu in 2013.HPLC of Formula: 219580-11-7 The following contents are mentioned in the article:

Protein tyrosine kinases (PTKs) are attractive targets in searching for therapeutic agents against many diseases. In this study, a series of dehydroabietylamine derivatives were first determined to show PTK inhibitory activity using a high-throughput screening (HTS) method based on homogeneous time-resolved fluorescence (HTRF) technol. The structure-activity relationships of the dehydroabietylamine derivatives were established, and it was found that the compounds with a nitrogen-containing side chain had better inhibitory activity. Further studies showed that the compounds substituted with halogen in the Ph ring resulted in higher inhibitory activity on the epidermal growth factor receptor (EGFR), and can be a guide to modify the structure of dehydroabietylamine derivatives Dehydroabietylamine derivatives might be a new class of multi-targeted and effective PTK inhibitors with structure modifications. This study involved multiple reactions and reactants, such as 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7HPLC of Formula: 219580-11-7).

1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7) belongs to pyrimidine derivatives. Pyrimidines are isomeric with two other forms of diazines: pyridazine, with the nitrogen atoms in the 1 and 2 positions; and pyrazine, with the nitrogen atoms in the 1 and 4 positions. Therapy for fungal infections is based mainly on four classes of antifungals: azoles, echinocandins, polyenes, and pyrimidine analogs.HPLC of Formula: 219580-11-7

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Development and validation of an automated high-throughput system for zebrafish in vivo screenings was written by Letamendia, Ainhoa;Quevedo, Celia;Ibarbia, Izaskun;Virto, Juan M.;Holgado, Olaia;Diez, Maria;Izpisua Belmonte, Juan Carlos;Callol-Massot, Carles. And the article was included in PLoS One in 2012.Related Products of 219580-11-7 The following contents are mentioned in the article:

The zebrafish is a vertebrate model compatible with the paradigms of drug discovery. The small size and transparency of zebrafish embryos make them amenable for the automation necessary in high-throughput screenings. We have developed an automated high-throughput platform for in vivo chem. screenings on zebrafish embryos that includes automated methods for embryo dispensation, compound delivery, incubation, imaging and anal. of the results. At present, two different assays to detect cardiotoxic compounds and angiogenesis inhibitors can be automatically run in the platform, showing the versatility of the system. A validation of these two assays with known pos. and neg. compounds, as well as a screening for the detection of unknown anti-angiogenic compounds, have been successfully carried out in the system developed. We present a totally automated platform that allows for high-throughput screenings in a vertebrate organism. This study involved multiple reactions and reactants, such as 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7Related Products of 219580-11-7).

1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7) belongs to pyrimidine derivatives. Pyrimidine is an aromatic heterocyclic organic compound similar to pyridine. We all know its importance to life – pyrimidine and purine bases are included in the structure of DNA and RNA.Related Products of 219580-11-7

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Isocytosine H₂-receptor histamine antagonists. I. Oxmetidine and related compounds was written by Brown, Thomas H.;Blakemore, Robert C.;Durant, Graham J.;Emmett, John C.;Ganellin, C. Robin;Parsons, Michael E.;Rawlings, D. Anthony;Walker, Terence F.. And the article was included in European Journal of Medicinal Chemistry in 1988.Quality Control of 5-Ethyl-6-methyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one The following contents are mentioned in the article:

2-[2-(5-Methyl-4-imidazolylmethylthio)ethylamino]-4-pyrimidones I (R = H, Me, PhO, substituted benzyl, etc.; R¹ = H, Me, Pr, PhCH₂) were prepared via substitution of (methylthio)pyrimidinones with 5-methyl-4-[(2-aminomethyl)thiomethyl]imidazole. The model compound I (R = R¹ = H) has modest H₂-antagonist activity as shown by its ability to antagonize histamine-stimulated tachycardia in guinea pig right atrium in vitro and inhibit histamine-stimulated gastric acid secretion in the lumen-perfused stomach of the anesthetized rat. Investigation of the effect of substituents in the pyrimidone ring showed that suitable substitution at the 5-position gave compounds with greatly increased activity, whereas substituents at other positions in the ring were not favorable for activity. Some structure-activity and structure-toxicity correlations are discussed. This study involved multiple reactions and reactants, such as 5-Ethyl-6-methyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (cas: 39083-15-3Quality Control of 5-Ethyl-6-methyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one).

5-Ethyl-6-methyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (cas: 39083-15-3) belongs to pyrimidine derivatives. The pyrimidine nitrogenous bases are derived from the organic compound pyrimidine through the addition of various functional groups. Pyrimidine derivatives have been used in a wide variety of pharmaceuticals including general anesthetics, anti-epilepsy medication, anti-malaria medication, drugs for treating high blood pressure, and HIV medication.Quality Control of 5-Ethyl-6-methyl-2-thioxo-2,3-dihydropyrimidin-4(1H)-one

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

KDM6B promotes activation of the oncogenic CDK4/6-pRB-E2F pathway by maintaining enhancer activity in MYCN-amplified neuroblastoma was written by D′Oto, Alexandra;Fang, Jie;Jin, Hongjian;Xu, Beisi;Singh, Shivendra;Mullasseril, Anoushka;Jones, Victoria;Abu-Zaid, Ahmed;von Buttlar, Xinyu;Cooke, Bailey;Hu, Dongli;Shohet, Jason;Murphy, Andrew J.;Davidoff, Andrew M.;Yang, Jun. And the article was included in Nature Communications in 2021.Reference of 1373423-53-0 The following contents are mentioned in the article:

The H3K27me2/me3 histone demethylase KDM6B is essential to neuroblastoma cell survival. However, the mechanism of KDM6B action remains poorly defined. We demonstrate that inhibition of KDM6B activity 1) reduces the chromatin accessibility of E2F target genes and MYCN, 2) selectively leads to an increase of H3K27me3 but a decrease of the enhancer mark H3K4me1 at the CTCF and BORIS binding sites, which may, consequently, disrupt the long-range chromatin interaction of MYCN and E2F target genes, and 3) phenocopies the transcriptome induced by the specific CDK4/6 inhibitor palbociclib. Overexpression of CDK4/6 or Rb1 knockout confers neuroblastoma cell resistance to both palbociclib and the KDM6 inhibitor GSK-J4. These data indicate that KDM6B promotes an oncogenic CDK4/6-pRB-E2F pathway in neuroblastoma cells via H3K27me3-dependent enhancer-promoter interactions, providing a rationale to target KDM6B for high-risk neuroblastoma. This study involved multiple reactions and reactants, such as Ethyl 3-((6-(4,5-dihydro-1H-benzo[d]azepin-3(2H)-yl)-2-(pyridin-2-yl)pyrimidin-4-yl)amino)propanoate (cas: 1373423-53-0Reference of 1373423-53-0).

Ethyl 3-((6-(4,5-dihydro-1H-benzo[d]azepin-3(2H)-yl)-2-(pyridin-2-yl)pyrimidin-4-yl)amino)propanoate (cas: 1373423-53-0) belongs to pyrimidine derivatives. The pyrimidine nitrogenous bases are derived from the organic compound pyrimidine through the addition of various functional groups. Therapy for fungal infections is based mainly on four classes of antifungals: azoles, echinocandins, polyenes, and pyrimidine analogs.Reference of 1373423-53-0

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Screening allergic components of Yejuhua injection using LAD2 cell membrane chromatography model online with high performance liquid chromatography-ion trap-time of flight-mass spectrum system was written by Lv, Yanni;Fu, Jia;Shi, Xianpeng;Yang, Zhiwei;Han, Shengli. And the article was included in Journal of Chromatography B in 2017.Safety of 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea The following contents are mentioned in the article:

Yejuhua (YJH) injection is a traditional Chinese medicine (TCM) injection and has a widely application in clin. practice. However, adverse drug reactions (ADRs) caused by YJH injection, majorly manifested as allergic reactions, have been reported. Hence, Effective and practical method for allergen screening and identification is needed. In this work, a LAD2/CMC model coupled online with HPLC-IT-TOF-MS system was developed to screen, analyze, and identify the allergenic components of YJH injection. A fraction was retained on the LAD2/CMC column, and identified as linarin (LN). Histamine release assay was performed by the multiple reaction monitoring (MRM) method of UPLC-ESI-MS/MS. Results showed that YJH injection and LN were in accord with their allergic effects by increasing histamine release. In conclusion, the LAD2/CMC-HPLC-IT-TOF-MS system developed in this study could be used to screen allergenic components in complex systems. This study involved multiple reactions and reactants, such as 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7Safety of 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea).

1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea (cas: 219580-11-7) belongs to pyrimidine derivatives. Pyrimidine is an aromatic heterocyclic organic compound similar to pyridine. A Cu-catalyzed and 4-HO-TEMPO-mediated [3 + 3] annulation of commercially available amidines with saturated ketones enables an efficient and facile synthesis of structurally important pyrimidines via a cascade reaction of oxidative dehydrogenation/annulation/oxidative aromatization.Safety of 1-(tert-Butyl)-3-(2-((4-(diethylamino)butyl)amino)-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl)urea

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia