Pyrimidines

Reference of 120747-84-4, 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.120747-84-4, name is 2-Aminopyrimidine-5-carbaldehyde, molecular formula is C5H5N3O, molecular weight is 123.11, as common compound, the synthetic route is as follows.

To a mixture of 166 mg (1.35 mmol) of aminopyrimidine 67, 17 mg (0.14 mmol) of DMAP and 418 muL (3.00 mmol) OfEt3N in 10 mL of THF was added 589 mg (2.7 mmol) of (BOC)2O. The mixture was stirred at room temperature for 5 h, concentrated-dry loaded on silica gel and flash chromatographed (1-3% acetone/ CH2Cl2) to produce 117 mg (0.36 mmol; 27%) of 68 as a clear oil.

The chemical industry reduces the impact on the environment during synthesis 120747-84-4, I believe this compound will play a more active role in future production and life.

Reference:
Patent; SCHERING CORPORATION; WO2008/108957; (2008); A2;,
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Pyrimidine – Wikipedia

Synthetic Route of 3680-69-1, 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 3680-69-1, name is 4-Chloro-7H-pyrrolo[2,3-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

METHOD L 7-Benzyl-4-chloro-7H-pyrrolo[2,3-d]pyrimidine To a stirred solution of 4-chloro-7H-pyrrolo[2,3-d]pyrimidine (250 mg/1.63 mmol) in 12 mL of DMF was added 676 mg (4.89 mmol) of potassium carbonate and the resulting mixture stirred at room temperature for 20 min. Benzylchloride (310 mg/2.45 mmol) was added and the new mixture stirred at room temperature for 24 h then filtered, concentrated and the residue purified by silica gel chromatography (3:1 hexanes/ethyl acetate) affording 318 mg (80%) of the title compound. LRMS: 244.1 (M+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 3680-69-1, 4-Chloro-7H-pyrrolo[2,3-d]pyrimidine.

Reference:
Patent; Blumenkopf, Todd A.; Flanagan, Mark E.; Brown, Matthew F.; Changelian, Paul S.; US2002/19526; (2002); A1;,
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Synthetic Route of 26305-13-5, Adding some certain compound to certain chemical reactions, such as: 26305-13-5, name is 2,4-Dihydroxy-5,6-dimethylpyrimidine,molecular formula is C6H8N2O2, 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 26305-13-5.

Step 1 5,6-Dimethyl-2,4-dichloropyrimidine A mixture solution of 5,6-dimethyl-2,4-dihydroxypyrimidine(72 g, 0.51 mol), phosphorous oxychloride(250 ml) and N,N-dimethylaniline(41 ml) was heated to reflux for 3 hours and cooled to room temperature. The reaction mixture was added to ice water and the resulting solid was filtered and recrystallized from dichloromethane to give 58.5 g of the titled compound. (Yield: 64.7%)

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. 26305-13-5, 2,4-Dihydroxy-5,6-dimethylpyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Yuhan Corporation; US5750531; (1998); A;,
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Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 1004-39-3, 4,6-Diaminopyrimidine-2-thiol, 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, 1004-39-3, blongs to pyrimidines compound. SDS of cas: 1004-39-3

(R)-N-(2-(5-(4-(1-((4,6-diaminopyrimidin-2-yl)thio)ethyl)-5-methylthiazol-2-yl)-2- methoxyphenoxy)ethyl)methanesulfonamide (10R) and (S)-N-(2-(5-(4-(1-((4,6- diaminopyrimidin-2-yl)thio)ethyl)-5-methylthiazol-2-yl)-2- methoxyphenoxy)ethyl)methane-sulfonamide (10S)A mixture of crude chloride F from previous step and 4,6-diamino-2-mercaptopyrimidine (112 mg, 0.86 mmol) in DMF (5 mL) was stirred at 80 C for 1 h. The solution was cooled, concentrated in vacuo and purified by flash column chromatography over silica gel (25: 1 dichloromethane: methanol) to give the couple of enantiomers 10R and 10S (178 mg, 0.35 mmol, ee 40% of 10R, 61% total yield in two steps) as a white solid. Recrystallization of the enantiomers with MeOHacetone solvent system gave the 10R with >93% ee. NMR (500 MHz, Acetone-d6) delta 7.55 (d, J= 2.0 Hz, 1H), 7.48 (dd, J= 8.5, 2.0 Hz, 1H), 7.06 (d, J= 8.5 Hz, 1H), 6.26 (br s, 1H), 5.60 – 5.55 (m, 4H), 5.37 (s, 1H), 5.30 (q, J= 7.0 Hz, 1H), 4.23 (t, J= 5.5 Hz, 2 H), 3.89 (s, 3H), 3.58 (dt, J= 5.5, 5.5 Hz, 2H), 3.05 (s, 3H), 2.52 (s, 3H), 1.74 (d, J= 7.0 Hz, 3H); 13C NMR (125 MHz, DMSO-d6) delta 168.0, 163.5 (2), 162.9, 153.6, 150.6, 147.8, 126.6, 126.2, 119.5, 1 12.3, 110.4, 79.0, 67.9, 55.7, 41.9, 36.1, 30.7, 22.2, 11.2; HRMS-ESI (m/z) [M+H]+ calcd for C20H26N6O4S3 H, 511.1256; found 51 1.1259; 10R [a]19D = +340.0 (c = 0.12 acetone) (ee = 93%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,1004-39-3, its application will become more common.

Reference:
Patent; THE REGENTS OF THE UNIVERSITY OF CALIFORNIA; THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS; RADU, Caius G.; LI, Zheng; GIPSON, Raymond M.; WANG, Jue; SATYAMURTHY, Nagichettiar; LAVIE, Arnon; MURPHY, Jennifer M.; NATHANSON, David A.; JUNG, Michael E.; WO2015/23776; (2015); A2;,
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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. 62802-42-0, name is 2-Chloro-5-fluoropyrimidine. A new synthetic method of this compound is introduced below., SDS of cas: 62802-42-0

Part 1: Preparation of 5-fluoropyrimidin-2-amine 2-Chloro-5-fluoropyrimidine (1.34 g, 10 mmol) was stirred with ammonium hydroxide (30%, 15 mL) at 100 C. in a sealed tube overnight. The mixture was cooled to room temperature and filtered. The solid was washed with water and dried to give the title compound (0.95 g, 80%) as a white solid.

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, 62802-42-0, 2-Chloro-5-fluoropyrimidine.

Reference:
Patent; PTC Therapeutics, Inc.; F. Hoffmann-La Roche AG; Woll, Matthew G.; Chen, Guangming; Choi, Soongyu; Dakka, Amal; Huang, Song; Karp, Gary Mitchell; Lee, Chang-Sun; Li, Chunshi; Narasimhan, Jana; Naryshkin, Nikolai; Paushkin, Sergey; Qi, Hongyan; Turpoff, Anthony A.; Weetall, Marla L.; Welch, Ellen; Yang, Tianle; Zhang, Nanjing; Zhang, Xiaoyan; Zhao, Xin; Pinard, Emmanuel; Ratni, Hasane; (317 pag.)US9617268; (2017); B2;,
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Reference of 941685-26-3, 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. 941685-26-3, name is 4-Chloro-7-((2-(trimethylsilyl)ethoxy)methyl)-7H-pyrrolo[2,3-d]pyrimidine. A new synthetic method of this compound is introduced below.

2-[(4-chloropyrrolo[2,3-d]pyrimidin-7-yl)methoxy]ethyl-trimethyl-decane (3.5 g, 12.3 mmol) and lithium hydroxide hydrate (5.17) g, 123 mmol) was stirred in a mixture of PDO (20 ml) and water (20 ml) at 100C for 116 hours. The reaction mixture was filtered, the filtrate was acidified with aqueous HCl (1 N, 80 ml), and the resulting solid compound was filtered off, washed with water and dried to give the title product.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,941685-26-3, its application will become more common.

Reference:
Patent; LES LABORATOIRES SERVIER; VERNALIS (R&D) LTD; KOTSCHY, ANDRAS; WEBER, CSABA; VASAS, ATTILA; MOLNAR, BALAZS; KISS, ARPAD; MACIAS, ALBA; MURRAY, JAMES BROOKE; LEWKOWICZ, ELODIE; GENESTE, OLIVIER; CHANRION, MAIA; DEMARLES, DIDIER; IVANSCHITZ, LISA; (502 pag.)TW2018/2094; (2018); A;,
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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 1004-39-3, name is 4,6-Diaminopyrimidine-2-thiol. This compound has unique chemical properties. The synthetic route is as follows. SDS of cas: 1004-39-3

PREPARATION 6: Synthesis of 4,6-diaminopyrimidine 167.78g of 2-mercapto-4,6-diaminopyrimidine was dissolved in 1007ml of 1.5N-aqueous sodium hydroxide solution, and the reaction solution was cooled down to 0 to 4C. To this reaction solution was slowly added dropwise 267.55g of 30% aqueous hydrogen peroxide solution. After the addition is completed, 170ml of acetic acid was slowly added dropwise to the reaction solution to precipitate the solid product which was then filtered, washed successively with 200ml of distilled water, 200ml of methanol and 400ml of diethylether and dried to obtain 185.56g of the solid product as a white powder. The solid product thus obtained was slowly added to 1L concentrated hydrochloric acid which was cooled to 0C to 4C. The reaction solution was stirred for one hour at the same temperature, warmed to room temperature and then stirred for further 8 hours. The solid product produced during the reaction was filtered, washed with 1L of acetone and 1L of diethylether and then dried to obtain 109.13g of the title compound in the form of hydrochloride salt. 109.13g of the solid thus obtained was suspended in 400ml of distilled water, and 200ml of 15% aqueous sodium hydroxide solution was then added thereto. The mixture was stirred at room temperature for one hour and filtered. The filtered solid product was washed with 400ml of ethanol and then dried to obtain 100.7g of the title compound as a white powder.

With the rapid development of chemical substances, we look forward to future research findings about 1004-39-3.

Reference:
Patent; LUCKY LTD.; EP643061; (1995); A1;,
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Application of 148550-51-0, 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. 148550-51-0, name is Ethyl 2-(methylsulfonyl)pyrimidine-5-carboxylate, molecular formula is C8H10N2O4S, 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.

General procedure: 60percent Sodium hydride (w/w) in mineral oil (0.0015 mol) was added to a mixture of appropriate III (0.001 mol) in THF (15 ml) under the condition of inert atmosphere using N2 flow at 5°C. The reaction mixture was kept for 1 h at room temperature. A solution of 2-(methylsulfonyl)-5-pyrimidinecarboxylic acid, ethyl ester (0.0015 mol) in THF (15 ml) was slowly added to reaction mixture. The resulting reaction mixture was stirred for 2-3 h at 5°C. The distilled water (20 ml) was added. The reaction mixture was extracted (10 ml x 3) with dichloromethane. The separated organic layer was dried over MgSO4, filtered, and the solvent was evaporated under reduced pressure to obtain crude product, recrytallized by ethyl acetate.

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 148550-51-0, Ethyl 2-(methylsulfonyl)pyrimidine-5-carboxylate.

Reference:
Article; Rajak, Harish; Agarawal, Avantika; Parmar, Poonam; Thakur, Bhupendra Singh; Veerasamy, Ravichandran; Sharma, Prabodh Chander; Kharya, Murli Dhar; Bioorganic and Medicinal Chemistry Letters; vol. 21; 19; (2011); p. 5735 – 5738;,
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Synthetic Route of 302964-08-5, Adding some certain compound to certain chemical reactions, such as: 302964-08-5, name is 2-((6-Chloro-2-methylpyrimidin-4-yl)amino)-N-(2-chloro-6-methylphenyl)thiazole-5-carboxamide,molecular formula is C16H13Cl2N5OS, 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 302964-08-5.

General Procedure A. To a suspension of thiazole-carboxamide 44 (1.0 eq, prepared as outlined in McIntyre, J A et al., Drugs of the Future, 2006, 31(4): 291) in 1,4-dioxane (10 mL/1 mmol) at rt was added diisopropylethylamine (DIPEA, 5.0 eq) followed by the piperazine 45-d4 (1.5 eq to 5.0 eq; generally 1.5 eq of the piperazine analogue was enough to achieve the complete displacement with extended reaction time). The reaction mixture was stirred under reflux conditions until no starting material was detectable (24-72 h), was stripped of solvent in vacuo, then dry-loaded onto a silica-gel column with 94:5:1 CH2Cl2/MeOH/ammonium hydroxide as eluent to give the desired product in 96 to >99% purity. Occasionally, residual solvents, detected by 1H-NMR, were removed by co-evaporation with water. Compound 100: 1H-NMR (300 MHz, DMSO-d6): delta 2.24 (s, 3H), 2.41 (s, 3H), 2.48-2.51 (m, 4H, obscured by DMSO peak), 3.51 (bs, 4H), 4.42 (s, 1H), 6.05 (s, 1H), 7.23-7.31 (m, 2H), 7.41 (dd, J1=7.3, J2=2.0, 1H), 8.22 (s, 1H), 9.90 (s, 1H), 11.50 (s, 1H). 13C-NMR (75 MHz, DMSO-d6): delta 18.20, 25.49, 43.48, 52.57, 82.48, 125.57, 126.92, 128.08, 128.94, 132.32, 133.40, 138.71, 140.71, 156.80, 159.80, 162.26, 162.44, 165.05. HPLC (method: 20 mm C18-RP column-gradient method 2-95% ACN+0.1% formic acid in 3.3 min with 1.7 min hold at 95% ACN; Wavelength: 254 nm): retention time: 2.57 min. MS (M+H): 492.0. Elemental Analysis (C22H22D4ClN7O2S.0.25H2O): Calculated: C=53.22; H=5.38; Cl=7.14; N=19.75; S=

According to the analysis of related databases, 302964-08-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; CONCERT PHARMACEUTICALS INC.; US2009/149399; (2009); A1;,
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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. 26452-81-3, name is 4-Chloro-6-methoxypyrimidine. A new synthetic method of this compound is introduced below., COA of Formula: C5H5ClN2O

To a solution of (S)isopropyl 2-(tert-butoxy)-2-(4-(chroman-6-yl)-2,6-dimethyl-5-( 1,2,3,4- tetrahydroisoquinolin-6-yl)pyridin-3-yl)acetate, 2 HC1 (0.0 15 g, 0.024 mmol) and 4- chloro-6-methoxypyrimidine (0.01 g, 0.069 mmol) in ACN (0.5 mL) was addedpotassium carbonate (0.02 g, 0.145 mmol) and heated at 100 °C for 18 h in a sealed vial. Then, cooled, filtered off the solid, removed the solvent and treated with EtOH (1 ml)sodium hydroxide (0.975 mg, 0.024 mmol). The resulting mixture was heated at 85for 3 h and purified by prep HPLC to afford (S)-2-(tert-butoxy)-2-(4-(chroman-6-yl)-5-(2- (2-methoxypyrimidin-4-yl)- 1,2,3 ,4-tetrahydroi soquinolin-6-yl)-2,6-dimethylpyridin-3yl)acetic acid (0.0077 g, 0.013 mmol, 51.4 percent yield). LCMS (M+H) = 609.4.

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, 26452-81-3, 4-Chloro-6-methoxypyrimidine.

Reference:
Patent; VIIV HEALTHCARE UK (NO.5) LIMITED; KADOW, John F.; NAIDU, B. Narasimhulu; TU, Yong; (133 pag.)WO2017/29631; (2017); A1;,
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