Pyrimidines

Synthetic Route of 6299-87-2, 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 6299-87-2, name is 6-Hydroxypyrimidine-4-carboxylic acid. This compound has unique chemical properties. The synthetic route is as follows.

Step 2: 6-chloropyrimidine-4-carboxylic acid chloride 50.0 g (0.35 mol) 6-hydroxypyrimidine-4-carboxylic acid were taken and 500 mL phosphorus oxychloride were added. Then 150 g (0.72 mol) phosphorus pentachloride were added batchwise with stirring. The reaction mixture was refluxed for 5 h. The phosphorus oxychloride was distilled off and the residue was purified by vacuum distillation through a column. Yield: 51.9 g (83% of th.) MS: m/z=176/178/180 (M)+

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 6299-87-2, 6-Hydroxypyrimidine-4-carboxylic acid.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; US2011/21500; (2011); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 56181-39-6, 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. 56181-39-6, name is 5-Bromo-4-chloropyrimidine, molecular formula is C4H2BrClN2, 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.

Compound (III-11) (120 mg, 0.620 mmol) and compound (IIb-2) (150 mg, 0.931 mmol) were dissolved in NMP(2.0 mL), p-toluenesulfonic acid monohydrate (118 mg, 0.620 mmol) was added and the mixture was stirred at 60C for2 hr. The reaction mixture was allowed to cool, water was added, and the mixture was extracted with ethyl acetate. Theorganic layer was dried over anhydrous sodium sulfate, and filtered. The solvent was evaporated under reduced pressure,and the residue was purified by silica gel column chromatography (n-hexane:ethyl acetate) to give compound (IV-122)(yield 100 mg, 51%)

According to the analysis of related databases, 56181-39-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Kaken Pharmaceutical Co., Ltd.; WATANABE, Atsushi; SATO, Yuuki; OGURA, Keiji; TATSUMI, Yoshiyuki; (331 pag.)EP3351533; (2018); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 1142188-60-0, 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. 1142188-60-0, name is tert-Butyl 4-hydroxy-5,6-dihydropyrido[3,4-d]pyrimidine-7(8H)-carboxylate, molecular formula is C12H17N3O3, 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.

31-B. 4-Chloro-5,8-dihydro-6H-pyrido[3,4-Patent; NOVARTIS AG; ARTMAN III, Gerald David; ELLIOTT, Jason Matthew; JI, Nan; LIU, Donglei; MA, Fupeng; MAINOLFI, Nello; MEREDITH, Erik; MIRANDA, Karl; POWERS, James J.; RAO, Chang; WO2010/66684; (2010); A2;,
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Pyrimidine – Wikipedia

Related Products of 3680-69-1, Adding some certain compound to certain chemical reactions, such as: 3680-69-1, name is 4-Chloro-7H-pyrrolo[2,3-d]pyrimidine,molecular formula is C6H4ClN3, 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 3680-69-1.

4-chloro-7H-pyrrolo[2,3-d]pyrimidine (8.0 g, 52.32 mmol, 1.0 eq) was dissolved in DMF (40 mL), NIS (15.7 g, 57.55 mmol, 1.1 eq) was added at 0C, stirred overnight at room temperature, 200 mL of saturated Na2S2O3 solution was added, filtered, washed with water three times, and dried in vacuum to obtain 14.6 g (100%) of products. 1H NMR (400 MHz, d6-DMSO): delta 12.94 (s, 1H), 8.59 (s, 1H), 7.93 (d, J = 2.4 Hz, 1H).

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. 3680-69-1, 4-Chloro-7H-pyrrolo[2,3-d]pyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Jinan University; Shanghai Institute of Materia Medica, Chinese Academy of Sciences; DING, Ke; GENG, Meiyu; TAN, Li; DING, Jian; ZHANG, Zhang; AI, Jing; REN, Xiaomei; GAO, Donglin; TU, Zhengchao; LU, Xiaoyun; ZHANG, Dongmei; (88 pag.)EP3339294; (2018); A1;,
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Pyrimidine – Wikipedia

Application of 14394-56-0, Adding some certain compound to certain chemical reactions, such as: 14394-56-0, name is 4-Amino-6-chloro-5-methylpyrimidine,molecular formula is C5H6ClN3, 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 14394-56-0.

The compound 6-chloro-5-methylpyrimidin-4-amine 48a (100 mg, 0.700 mmol), cyclopropylcarbonyl chloride (87 mg,0.839 mmol), pyridine (3 mL) and tetrahydrofuran (3 mL) were combined.The mixture was heated to 60 C and stirred for 16 hours.This mixture was diluted with 20 ml of water and extracted with ethyl acetate (20 mL¡Á2).The combined organic phases were washed with brine (20 mL¡Á2).The organic phase is dried over anhydrous sodium sulfate, and the desiccant is removed by filtration.Decompressing under reduced pressure to obtain a crude product,The residue was purified by preparative silica gel ( petroleum ether / ethyl acetate = 4:1).The target product N-(6-chloro-5-methylpyrimidin-4-yl)cyclopropanecarboxamide 48b (40 mg,0.190 mmol, white solid). Yield: 27%.

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. 14394-56-0, 4-Amino-6-chloro-5-methylpyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Nanjing Tianyinjianhua Pharmaceutical Technology Co., Ltd.; Kong Xianglong; Zhou Chao; Zheng Zhixiang; (105 pag.)CN109020957; (2018); A;,
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Pyrimidine – Wikipedia

Reference of 6693-08-9, 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 6693-08-9 as follows.

Intermediate 17(4,6-Dichloro-5-fluoro-pyrimidin-2-yl)-(5-methoxy-lH-pyrazol-3-yl)-amine To the solution of 2,4,6-trichloro-5-fluoro-pyrimidine (PCT Pub. No. WO200549033, 1.66 g, 8.26 mmol) in EtOH (3OmL) at -300C was added 5-methoxy-lH-pyrazol-3-amine (Intermediate 8, 1.Og, 9.08 mmol). DIPEA (4.3 mL, 25 mmol) was added to the solution and the reaction mixture was naturally warmed to 00C for 3 hours and then at room temperature overnight. Evaporation of the solvents under reduced pressure, a white precipitate was removed by filtration. The mother liquid was evaporated to dryness and purified by silica gel chromatography (ISCO, DCM/MeOeta/Neta4Oeta: 100/0/0-100/3/0.3) to give the title compound (221mg, 10%). LCMS: 279 [M+H].

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,6693-08-9, its application will become more common.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2008/132502; (2008); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 148550-51-0, 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.148550-51-0, name is Ethyl 2-(methylsulfonyl)pyrimidine-5-carboxylate, molecular formula is C8H10N2O4S, molecular weight is 230.24, as common compound, the synthetic route is as follows.

To a stirred solution of Intermediate 2 (1.87 g, 6.94 mmol) in dry acetonitrile, potassium carbonate (2.87g, 20.8 mmol, spectrochem) and ethyl 2-(methylsulfonyl)pyrimidine-5-carboxylate were added and the resulting mixure was at rt for 12 h. It was filtered through celite and concentrated. Dichloromethane (25 mL) was added and the solution was washed with water, brine and dried over Na2SO4. After evaporation of the solvents, the crude product was purified by flash column chromatography to afford the title compound (white solid).1H NMR (400 MHz, DMSO-d6): 8.74 (s, 2H), 6.85 (t, J = 7.8 Hz, 2H), 6.75 (d, J = 7.8 Hz, 1H), 5.98 (s, 2H), 4.25 (q, J = 6.8 Hz, 2H), 3.81 (s, 4H), 3.32 (s, 1 H), 2.37-2.42 (m, 4H), 1 .28 (d, J = 6.6 Hz, 6H).LCMS: (Method A) 385.2 (M+H), Rt. 3.22 min, 98.88percent (Max).

The chemical industry reduces the impact on the environment during synthesis 148550-51-0, I believe this compound will play a more active role in future production and life.

Reference:
Patent; ASCENEURON SA; QUATTROPANI, Anna; KULKARNI, Santosh S.; GIRI, Awadut Gajendra; (243 pag.)WO2016/30443; (2016); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 6299-85-0, 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. 6299-85-0, name is Methyl 2,6-dichloropyrimidine-4-carboxylate. A new synthetic method of this compound is introduced below.

General procedure: To a solution of nitrogen-containing nucleophile (1 eq.) and cesium carbonate (3.0 eq.) in N,N-dimethylformamide (2 mL/mmol) was added 2-haloheterocycle (1.1 eq.). Thereaction was heated to 100 C. and stirred at this temperature for 2 hours. Thereaction was then cooled to room temperature and acidified to pH=1 with 10%aqueous HCl solution if product contains a carboxylic acid, or diluted withwater if neutral. The solution was extracted with twice with dichloromethane.The organic layers were combined, dried with sodium sulfate and concentratedunder vacuum. The crude material was either used directly in subsequentreactions or purified by flash chromatography.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,6299-85-0, its application will become more common.

Reference:
Patent; Genentech, Inc.; Blaquiere, Nicole; Castanedo, Georgette; Feng, Jianwen A.; Hu, Baihua; Staben, Steven; Yuen, Po-wai; Wu, Guosheng; Lin, Xingyu; Burch, Jason; US2015/57260; (2015); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 4316-94-3, 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.4316-94-3, name is 6-Chloro-5-nitropyrimidin-4-amine, molecular formula is C4H3ClN4O2, molecular weight is 174.55, as common compound, the synthetic route is as follows.

General procedure: 6-Chloro-5-nitropyrimidine-4-amine (0.5mmol), amine (1.5mmol), Pd2(dba)3 (0.01mmol), R-BINAP (0.03mmol) and potassium carbonate (0.7mmol) were dissolved in acetonitrile (5mL). The solution was stirred at room temperature for 3.5h under an argon atmosphere. The resulting reaction mixture was treated with saturated brines (50mL) and extracted with acetonitrile (3¡Á25mL), and dried with anhydrous Na2SO4. The anhydrous Na2SO4 was removed by filtration and the filtrate was concentrated. The residue was washed with ethyl acetate (3¡Á2mL) and diethyl ether (3¡Á2mL), filtered and dried under vacuum.

The chemical industry reduces the impact on the environment during synthesis 4316-94-3, I believe this compound will play a more active role in future production and life.

Reference:
Article; Liu, Meng-Meng; Mei, Qiong; Zhang, Yi-Xiao; Bai, Peng; Guo, Xiang-Hai; Chinese Chemical Letters; vol. 28; 3; (2017); p. 583 – 587;,
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Pyrimidine – Wikipedia

Application of 17321-93-6, 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 17321-93-6, name is 2-Amino-5-bromo-4-methylpyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

A mixture of 5-bromo-4-methylpyrimidine-2-ylamine (5.0 g, 26 mmol), potassium acetate (7.83 g, 79.8mmol), 4,4,5,5-tetramethyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,3,2-dioxaborolane (7.43 g,29.2 mmol) in dioxane (140 mL) was stirred for 20 min under nitrogen. 1,1?-bis(diphenylphosphino)ferrocene palladium (II) chloride dichloromethane adduct (1.08 g, 1.33 mmol) was added to the reaction mixture. The reaction mixture was heated to 115¡ã C. for 18 h under nitrogen. Upon completion, the mixture was cooled and EtOAc was added. The resulting mixture was sonicated and filtered. Additional EtOAc was used to wash the solid. The combined organic extracts were washed with water, dried over MgSO4, filtered and concentrated. The crude was purified by chromatography eluting with 20~100percent EtOAc/hexane to yield 4.5 g of 4-methyl-5-(4,4,5,5-tetramethyl (1,3,2-dioxaborolan-2-yl))pyrimidine-2-ylamine 26 (yield: 74percent). 1H-NMR (DMSO, 400 MHz): delta 8.28 (s, 1H), 6.86 (br s, 2H), 2.35 (s, 3H), 1.25 (s, 12H). MS (ESI) m/e (M+H+) 236.15, 154.07.

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 17321-93-6, 2-Amino-5-bromo-4-methylpyrimidine.

Reference:
Patent; Genentech, Inc.; Heald, Robert Andrew; McLean, Neville James; US2014/65136; (2014); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia