Category: 32779-36-5

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. 32779-36-5, name is 5-Bromo-2-chloropyrimidine, the common compound, a new synthetic route is introduced below. 32779-36-5

Preparation B: N- j5-(4-bromophenyl)-6- j2- j(5-bromo-2-pyrimidinyl)oxyj ethoxyj – 4-pyrimidinylj -N?- propylsulfamide (macitentan):N-(5 -(4-bromophenyl)-6-(2-hydroxyethoxy)pyrimidin-4-yl)propane- 1 -sulfamide (200 g; 0.46 mol; see Example 2 or 3) and 5-bromo-2-chloropyrimidine (117 g; 0.60 mol; 1.3 eq) were dissolved in toluene (3 L) and DMF (400 mL). The reaction mixture was warmed up to 50¡ãC and toluene (approx. 400 mL) was distilled our under reduced pressure. The mixture was cooled to 0 ¡ãC and tBuOK (156 g, 3 eq, 1.38 mol) was added portionwise. It was stirred at 20 ¡ãC for 1 h. Water (1 L) was added and the pH of the solution was adjusted to 3-5 using 33percent aq. HC1. The mixture was heated to 50¡ãC and the layers were separated. The org. phase was treated with charcoal at 50¡ãC and filtered over Celite. The filter cake was rinsed with toluene. At 50¡ãC, water (1 L) was added to the org. layer. The layers were separated. The org. layer was concentrated under reduced pressure to a total volume of 1 L and cooled to 0¡ãC. The solid obtained was filtered off It was rinsed with toluene and MeOH. The crude material was suspended in EA (1 L) and heated to 50¡ãC. 300 mL of EA were distilled out and MeOH (400 mL) was added. The suspension was cooled down to 0¡ãC. The solid was filtered off, rinsed with MeOH and dried under reduced pressure to afford the title compound as a white solid (225 g; 83percent yield).

The synthetic route of 32779-36-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ACTELION PHARMACEUTICALS LTD; ABELE, Stefan; FUNEL, Jacques-Alexis; SCHINDELHOLZ, Ivan; WO2014/155304; (2014); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

32779-36-5, 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. 32779-36-5, name is 5-Bromo-2-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.

Step 1: To a solution of 5-bromo-2-chloropyrimidine (2.3 g, 11.9 mmol) and aniline (1.5 mL, 16.1 mmol) in n-BuOH (20 mL) was added DIEA (2 mL, 12,8 mmol). The mixture was stirred at 110-120 C overnight, then cooled to rt and concentrated to dryness to afford 5- bromo-N-phenylpyrimidin-2-amine as a brown solid (2.0 g, 70%).

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. 32779-36-5, 5-Bromo-2-chloropyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; PLEXXIKON INC.; HOLLADAY, Mark W.; LIU, Gang; (267 pag.)WO2017/19804; (2017); A2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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. 32779-36-5, name is 5-Bromo-2-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. 32779-36-5

Intermediate 19; Preparation of 2-(3,3-dimethylbut-1-ynyl)pyrimidine-5-carboxylic acid; 5-Bromo-2-iodo-pyrimidine The title compound was prepared according to the procedure given The Journal of Organic Chemistry, 2002, 67, 6550-6552. In 57% hydiodic acid (aqeous) precooled to 0 C. was added to solid 5-Bromo-2-chloro-pyrimidine (3.36 g, 0.0174 mol) in a 100 ml round bottom flask. The mixture was stirred vigorously at 0 C. and after 4 hours, was allowed to warm to room temp and stirred overnight. The mixture was then poured over ice and carefully neutralized by addition of solid sodium bicarbonate. Solid sodium hydrogensulfite added until mixture became colorless then the mixture was extracted with EtOAc (2¡Á200 mL). The combined organic extracts were washed with brine and dried (MgSO4), filtered and concentrated under vacuum to leave a white solid (4.2 g) which was used without further purification.

The chemical industry reduces the impact on the environment during synthesis 32779-36-5, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Kelly, Michael G.; Kincaid, John; Duncton, Matthew; Sahasrabudhe, Kiran; Janagani, Satyanarayana; Upasani, Ravindra B.; Wu, Guoxian; Fang, Yunfeng; Wei, Zhi-Liang; US2006/194801; (2006); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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. 32779-36-5, name is 5-Bromo-2-chloropyrimidine. A new synthetic method of this compound is introduced below., 32779-36-5

To a solution of 5-bromo-2-chloropyrimidine (4 g, 20.68 mmol) in acetonitrile (40 mL) was added 2-methoxyethanamine (5.5 mL, 63 mmol) and potassium carbonate (14 g, 100 mmol) . The mixture was heated at 100 and stirred for 6 h. The reaction mixture was concentrated to remove solvent. The residue was diluted with water (30 mL) . The resulting mixture was extracted with DCM (50 mL ¡Á 3) . The combined organic layers were dried over anhydrous Na2SO4and concentrated in vacuo. The residue was purified by silica gel column chromatography eluted with PE/EtOAc (v/v) 9/1 to give a colorless oily product (4.43 g, 92.3) .[1798]MS (ESI, pos. ion) m/z: 233.2 [M+1]+.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,32779-36-5, 5-Bromo-2-chloropyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; SUNSHINE LAKE PHARMA CO., LTD.; LIU, Bing; ZHANG, Yingjun; CHENG, Changchung; HUANG, Jiuzhong; BAI, Shun; REN, Xingye; LI, Zhi; ZHOU, Youbai; (368 pag.)WO2016/615; (2016); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 32779-36-5, 5-Bromo-2-chloropyrimidine, 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, 32779-36-5, blongs to pyrimidines compound. 32779-36-5

To a solution of 5-bromo-2-chloro-pyrimidine (0.5 g, 2.58 mmol) in 1,4-dioxane (20 mL),tert-butyl piperazine-1-carboxylate (0.722 g, 3.88 mmol) and K2C03 (0.713 g, 5.17 mmol)were added at RT. The reaction mixture was refluxed for 4 h (TLC indicated complete consumption of starting material). The reaction mixture was brought toRT, diluted withwater (20 mL) and extracted with EtOAc (3 x 50 mL). The combined organic extracts werewashed with water (2 x 40 mL), brine (1 x 40 mL), dried over Na2S04 and concentratedunder reduced pressure to give the residue. The residue was further purified by columnchromatography (100-200 silica gel, 15 g, 10% EtOAc-Hexane) to afford tert-butyl4-(5-bromopyrimidin-2-yl)piperazine-l-carboxylate (0.7 g, 78%) as a white solid.1H NMR [400 MHz, CDCh]: J 8.29 (s, 2H), 3.75 (t, J = 4.8 Hz, 4H), 3.47 (t, J = 5.2 Hz,4H), 1.47 (s, 9H).LCMS: m/z: 287.44 [M-tBut.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,32779-36-5, its application will become more common.

Reference:
Patent; MITOBRIDGE, INC.; TAKAHASHI, Taisuke; KLUGE, Arthur; LAGU, Bharat; JI, Nan; (162 pag.)WO2018/125961; (2018); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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. 32779-36-5, name is 5-Bromo-2-chloropyrimidine. A new synthetic method of this compound is introduced below., 32779-36-5

5-Bromo 2-chloro pyrimidine (2 g, 10.33 mmol, Combi-Blocks) was degassed for 30 mm. 1-Ethoxy vinyl tributyltin (4.1 mL, 11.3 mmol, Frontier Scientific) and bis(triphenylphosphine)palladium dichloride (0.36 g, 0.51 mmol) were added at rt. The resulting mixture was stirred overnight at 90 C. It was cooled to rt and filtered through celite. An aqueous HCI solution (6 N, 10 mL) was added and the mixture was stirred for1 hour at rt. It was neutralized with sat.NaHCO3 solution (15 mL), extracted with DCM (50 mL), dried over anhydrous Na2504 and concentrated. The crude product was purified by flash column chromatography to afford the title compound (pale yellow solid). 1H NMR (400 MHz, DMSO-d6): 6 8.90 (s, 2H), 2.65 (s, 3H). LCMS: (Method B) 162.0 (M+H), Rt. 4.6 mm, 98.01% (Max).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,32779-36-5, 5-Bromo-2-chloropyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; ASCENEURON S. A.; QUATTROPANI, Anna; KULKARNI, Santosh, S.; GIRI, Awadut Gajendra; TORONTO, Dawn, V.; CROWE, David, Malcolm; (150 pag.)WO2017/144637; (2017); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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. 32779-36-5, name is 5-Bromo-2-chloropyrimidine. A new synthetic method of this compound is introduced below., 32779-36-5

Step 1: 1-(5-Bromopyrimidin-2-yl)piperidin-4-olA mixture of 5-bromo-2-chloropyrimidine (5 g, 25.8 mmol), piperidin-4-ol (2.88 g, 28.4 mmol) and triethylamine (5.40 mL, 38.8 mmol) in EtOH (51.7 mL) was heated at 90¡ã C. for 0.5 h. The solvent was evaporated, the residue was diluted with 1N HCl (20 mL) and extracted with EtOAc (3.x.15 mL). The combined organic fractions were dried over Na2SO4 and the solvent was evaporated. The product was recrystallized from CH2Cl2/hexanes, filtered and washed with hexanes to afford the title product.1H NMR (500 MHz, acetone-d6): delta 8.36 (s, 2H), 4.29 (dt, 2H), 3.94-3.87 (m, 1H), 3.38 (ddd, 2H), 1.91-1.85 (m, 2H), 1.51-1.42 (m, 2H) ppm. MS: m/z 258, 260 (MH+).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,32779-36-5, 5-Bromo-2-chloropyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; Leblanc, Yves; Powell, David; Ramtohul, Yeeman K.; Leger, Serge; US2008/182838; (2008); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

The common heterocyclic compound, 32779-36-5, name is 5-Bromo-2-chloropyrimidine, molecular formula is C4H2BrClN2, 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. 32779-36-5

Step 1. 5-Bromo-N-cyclopropylpyrimidin-2-amine A solution of 5-bromo-2-chloropyrimidine (3.87 g, 20 mmol) and cyclopropylamine (5.7 g, 0.1 mol) in 20 mL THF was heated at 65¡ã C. for 5 hrs in a sealed tube. The mixture was evaporated in vacuo, to the residue ethanol was added, after filtration, the cake was washed with ethanol to give 4.07 g product as a colorless solid (95.5percent). 1H NMR (300 MHz, CDCl3) delta: 8.32 (2H, s), 5.58 (1H, brs), 2.72 (1H, brs), 0.82-0.84 (2H, m), 0.54 (2H, brs). LCMS: m/z [M+H]+ 214.0011.

The synthetic route of 32779-36-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Astar Biotech LLC; YU, Chunrong; Huang, Haihong; Zhang, Dongfeng; Li, Peng; US2014/31354; (2014); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

32779-36-5, 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. 32779-36-5, name is 5-Bromo-2-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.

Synthesis of Compound 11-3 (0400) To a solution of 11-2 (2.0 g, 10 mmol) in methanol (15 mL) was added CH3ONa (2.16 g, 40 mmol). The resulting mixture was stirred at 70 C. overnight. Methanol was evaporated in vacuum. Water (10 mL) was added carefully to the residue and the mixture was extracted with ethyl acetate (300 mL¡Á3). The combined organic layers were dried over Na2SO4, filtered and concentrated to afford 11-3 as a yellow solid (1.17 g, 60%).

The chemical industry reduces the impact on the environment during synthesis 32779-36-5, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Nivalis Therapeutics, Inc.; Wasley, Jan; Rosenthal, Gary J.; Sun, Xicheng; Strong, Sarah; Qiu, Jian; US9138427; (2015); B2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 32779-36-5, name is 5-Bromo-2-chloropyrimidine. This compound has unique chemical properties. The synthetic route is as follows. 32779-36-5

To 1,4-dioxane (30 mL) were added tert-butyl piperazine-1-carboxylate (2.89 g, 15.51 mmol), 5-bromo-2-chloropyrimidine (2.00 g, 10.34 mmol) and potassium carbonate (2.86 g, 20.68 mmol) sequentially. The mixture was heated to 110 ¡ãC, after stirring for 12 hours, the reaction mixture was cooled to room temperature, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (PE/EtOAc (v/v) = 20/1) to give the title compound as a pale yellow solid (3.15 g, 88.7percent).MS (ESI, pos. ion)m/z: 343.1 [M+H] and?HNMR(400IVIHz, CDC13): (ppm) 8.29 (s, 2H), 3.83-3.66 (m, 4H), 3.56-3.41 (m, 4H), 1.48 (s, 9H).

Statistics shows that 32779-36-5 is playing an increasingly important role. we look forward to future research findings about 5-Bromo-2-chloropyrimidine.

Reference:
Patent; SUNSHINE LAKE PHARMA CO., LTD.; ZHANG, Yingjun; JIN, Chuanfei; LIANG, Haiping; YI, Chao; ZHANG, Ji; (94 pag.)WO2016/192657; (2016); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia