Pyrimidines

As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 946161-16-6, name is (R)-Methyl 2-((2-chloro-5-nitropyrimidin-4-yl)(isopropyl)amino)butanoate, molecular formula is C12H17ClN4O4, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below. Quality Control of (R)-Methyl 2-((2-chloro-5-nitropyrimidin-4-yl)(isopropyl)amino)butanoate

50 g 23 in 375 mL of tetrahydrofurane is hydrogenated in the presence of 5 g Platinum on Carbon (5%) at a hydrogene pressure of 3 bar and at 35 C until no further hydrogene consumed. 2.5 g vanadyl acetylacetonate are added and the hydrogenation is continued. The suspension is filtered to remove the catalysts. The solvent is removed under reduced pressure. 150 mL 2-propanol are added to the residue and heated to reflux. 300 ml of demineralised water are added. The suspension is cooled slowly to 2 C. The suspension is suction filtered and washed with a cold mixture of 2- propanol and demineralised water. After drying in a vacuum drying oven at 50C, 36 g (90% of theory) of product 24 is obtained

With the rapid development of chemical substances, we look forward to future research findings about 946161-16-6.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BOEHRINGER INGELHEIM PHARMA GMBH & CO. KG; WO2007/90844; (2007); A1;,
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Electric Literature of 1195-08-0 ,Some common heterocyclic compound, 1195-08-0, molecular formula is C5H4N2O3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

Amine 2.2; 5-[(cyclopropylamino)methyl]-l ,3-bis(3-methoxypropyl)pyrimidine-2,4(lH,3/i)- dione; Step 1 : l,3-bis(3-methoxypropyl)-2,4-dioxo-l,2,3,4-tetrahvdropyrimidine-5-carbaldehvde; To a solution of 2,4-dioxo-l,2,3,4-tetrahydropyrimidine-5-carbaldehyde (1 eq.) and l-bromo-3-methoxypropane (2.2 eq.) at rt in DMF (0.36 M) was added DBU (2.2 eq.). The reaction mixture was stirred at rt 3 days, concentrated in vacuo, and the residue purified by flash chromatography (SiO2; EtOAc) to afford the title compound.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 1195-08-0, 2,4-Dioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; MERCK FROSST CANADA LTD.; WO2009/70869; (2009); A1;,
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Adding a certain compound to certain chemical reactions, such as: 39906-04-2, 4,6-Dichloro-2-methylpyrimidin-5-amine, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, HPLC of Formula: C5H5Cl2N3, blongs to pyrimidines compound. HPLC of Formula: C5H5Cl2N3

NH3 (g) was bubbled into EtOH (60 mL) at -40 C for 0.5 h (15 Psi). Then 4,6- dichloro-2-methyl-pyrimidin-5-amine (5 g, 28.09 mmol, 1 eq) was added at 18 C, and the result reaction mixture was stirred at 120 C for 13.5 hr (15 Psi). The reaction mixture was concentrated under reduced pressure to remove EtOH. Compound 6-chloro-2-methyl- pyrimidine -4, 5-diamine (I-791) (5.8g) was obtained as a yellow solid. LCMS m/z 158.8 (M+1)+.

The synthetic route of 39906-04-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SITARI PHARMA, INC.; CAMPBELL, David; CHAPMAN, Justin; CHEUNG, Mui, H.; DIRAIMONDO, Thoams, R.; DURON, Sergio, G.; (615 pag.)WO2020/33784; (2020); A1;,
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Reference of 26032-72-4, In the chemical reaction process,reaction time,type of solvent,can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product.An updated downstream synthesis route of 26032-72-4 as follows.

General procedure: The respective dichloropyrimidine derivative 9 (between 60 mg and 120 mg) and 1.5 equivalents of the respective amine are dissolved in DMF (2.00 mL). The reaction mixture is heated to 40 C and stirred for 18 hours. Subsequently, the solvent is removed under reduced pressure and the crude product is purified via column chromatography (SiO2, dichloromethane / ethyl acetate = 20:1).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,26032-72-4, its application will become more common.

Reference:
Article; Hammer, Sebastian G.; Gobleder, Susanne; Naporra, Franziska; Wittmann, Hans-Joachim; Elz, Sigurd; Heinrich, Markus R.; Strasser, Andrea; Bioorganic and Medicinal Chemistry Letters; vol. 26; 2; (2016); p. 292 – 300;,
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Related Products of 13544-44-0, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 13544-44-0, name is 2,4-Dichloro-5-iodopyrimidine, molecular formula is C4HCl2IN2, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

j00447j To a solution of 2,4-dichloro-5-iodo-pyrimidine (1.0 g, 3.6 mmol) in THF (20 mL) was added sodium hydroxide (1 N, 15 mL). The mixture was stirred at 25 C for 2 hours, then poured into water (100 mL) and extracted with ethyl acetate (4 x 50 mL). The combined organic phase was washed with brine (2 x 100 mL), dried with anhydrous sodium sulfate, filtered and concentrated in vacuo to give compound B-88 (0.6 g, 64% yield) as a yellow solid. ?H-NMR (MeOD, 400 MHz):8.40 (s, 1H), 7.85(s, 1H).

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 13544-44-0, 2,4-Dichloro-5-iodopyrimidine.

Reference:
Patent; FORUM PHARMACEUTICALS, INC.; ACHARYA, Raksha; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; COOK, Andrew, Simon; HARRISON, Bryce, Alden; McRINER, Andrew, J.; (267 pag.)WO2017/69980; (2017); A1;,
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Related Products of 13223-25-1, With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.13223-25-1, name is 2-Chloro-4,6-dimethoxypyrimidine, molecular formula is C6H7ClN2O2, molecular weight is 174.59, as common compound, the synthetic route is as follows.

EXAMPLE 9 Preparation of methylthioethyl 2,6-bis[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoate (Compound No. 2) Methylthioethyl 2,6-dihydroxybenzoate (4.5 g) was dissolved in DMF, and 60% sodium hydride (1.6 g) was added thereto. Then, 2 chloro-4,6-dimethoxypyrimidine (3.5 g) was added thereto, and the mixture was heated and reacted at a temperature within a range of from 90 to 10 C. for two hours. The reaction solution was poured into ice water and then extracted twice with ethyl acetate. The ethyl acetate layer was washed with water and dried over anhydrous sodium sulfate. After removing inorganic substances by filtration, the solvent was distilled off under reduced pressure. The residue was purified by column chromatography to obtain the above identified compound as a colorless viscous liquid. (etaD20: 1.5706).

The chemical industry reduces the impact on the environment during synthesis 13223-25-1, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Kumiai Chemical Industry Co., Ltd.; Ihara Chemical Industry Co., Ltd.; US4906285; (1990); A;,
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In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 2565-47-1, name is 1-Methylpyrimidine-2,4,6(1H,3H,5H)-trione, the common compound, a new synthetic route is introduced below. SDS of cas: 2565-47-1

General procedure: A mixture of barbituric acid 1 (1 mmol) and aldehyde 2 (1mmol) was refluxed in 5 mL of water for an appropriate timeuntil the generation of 5-arylidenebarbituric acid as indicatedby TLC. Next 2-aminothiophenol (3, 1 mmol) and benzaldehyde(2a, 1 mmol) were added, and the reaction mixture was furtherrefluxed for an appropriate time. On completion of the reactionas indicated by TLC the reaction mixture was allowed to cool toroom temperature and was extracted with EtOAc (3 ¡Á 10 mL).After drying with anhydrous Na2SO4 and evaporation underreduced pressure, the crude product was purified suitablyeither by recrystallization from a DCM/EtOH (1:1) solventmixture or column chromatography on silica gel usingEtOAc/hexane (2:8) as the eluent to afford 5-monoalkylbarbiturate4.

The synthetic route of 2565-47-1 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Kalita, Subarna Jyoti; Deka, Dibakar Chandra; Synlett; vol. 29; 4; (2018); p. 477 – 482;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 6299-25-8, name is 4,6-Dichloro-2-(methylthio)pyrimidine. A new synthetic method of this compound is introduced below., Safety of 4,6-Dichloro-2-(methylthio)pyrimidine

To a stirred solution of 4,6-dichloro-2- (methylthio)pyrimidine (50 g, 0.26 mol) in dichloromethane (1 L) at 00C was added meta-chloroperoxybenzoic acid (143.6 g, 0.64 mol) over a period of 20 minutes. The solution was allowed to warm to room temperature and was stirred for 4 hours. The mixture was diluted with dichloromethane (1.5 L) and then treated sequentially with 50% Na2S2O3 / NaHCO3 solution (2 x 200 ml), sat. NaHCO3 solution (4 x 300 ml), and brine (200 ml) then dried (MgSO4). The solvent was removed in vacuo to afford an off-white solid, which was redissolved in EtOAc (IL) and treated sequentially with sat. NaHCO3 solution (3 x 300 ml), and brine (100 ml) then dried (MgSO4). The solvent was removed EPO in vacuo to afford the title compound (A) as a white solid (55.6 g, 96% yield). 1H NMR CDCl3 delta 3.40 (3H5 s, CH3), 7.75 (IH. s. ArH).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it, 6299-25-8, 4,6-Dichloro-2-(methylthio)pyrimidine.

Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2007/14250; (2007); A2;,
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Electric Literature of 126728-20-9, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 126728-20-9, name is 2,4-Dichloropyrido[2,3-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

General procedure: A mixture of 5 (5.0 mmol), the respective amine (12 mmol), equimolecular amounts of triethylamine, and ethanol (15 mL) was heated at 70 C for 5 h with stirring. The solvent was removed under vacuum and the residue was dissolved in water (30 mL); the mixture was extracted with chloroform (3 ¡Á 25 mL) and the organic extracts were dried over anhydrous sodium sulfate and the solvent was removed in vacuum. For compounds 6t-y the resulting solid was purified by recrystallization as indicated in Table 1. For compounds 6z-ai the residual material isolated after removal of the solvent was washed with 5% HCl (25 mL) and the resulting solid was isolated and purified as indicated in Table 1.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 126728-20-9, 2,4-Dichloropyrido[2,3-d]pyrimidine.

Reference:
Article; Font, Maria; Gonzalez, Alvaro; Palop, Juan Antonio; Sanmartin, Carmen; European Journal of Medicinal Chemistry; vol. 46; 9; (2011); p. 3887 – 3899;,
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Application of 153435-63-3, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 153435-63-3, name is 2-(Tributylstannyl)pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

Example 5 N-[6-(2-tert-Butoxy-ethoxy)-5-(2-methoxy-phenoxy)-[2,2′]bipyrimidinyl-4-yl]-4-ethyl-benzenesulfonamide (14) [Show Image] A solution of 2-tributylstannanyl pyrimidine (212 mg, 0.57 mmol), 2-pyrimidin triflate intermediate (12) (300 mg, 0.44 mmol), and Pd(PPh3)4 (52 mg, 0.044 mmol) in dry dimethylacetamide (4.5 mL) was heated at 130C for 6 h. After being cooled to room temperature, the reaction was filtered through a plug of Celite, the filtrate was diluted with water and extracted twice with ethyl acetate. The combined organic layers were washed with brine, solvent was removed and the residue was purified by silica gel chromatography furnishing the desired compound as a pale yellow solid (216 mg, 80 %). 1H-RMN (200 MHz, CDCl3) : 1.13 (s, 9H); 1.26 (s, 9H); 3.62 (m, 2H); 4.00 (s, 3H); 4.63 (m, 2H); 6.81-7.18 (m, 4H), 7.43 (m, 3H); 8.23 (d, J = 8.0 Hz, 2H); 9.01 (s, 2H) ppm.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 153435-63-3, 2-(Tributylstannyl)pyrimidine.

Reference:
Patent; Laboratorios Lesvi, S.L.; EP2368884; (2011); A1;,
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