Day: March 16, 2022

Application of 114040-06-1, 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. 114040-06-1, name is 3-Bromo-5,7-dichloropyrazolo[1,5-a]pyrimidine. A new synthetic method of this compound is introduced below.

To a solution of 3-bromo-5,7-dichloropyrazolo[l,5-a]pyrimidine (14.6 g, 55.3 mmol) in DCM (200 mL) was added cis-hydroxy-3- methylcyclobutane-l-methylamine (7.0 g, 60.9 mmol), and DIPEA (19.2 mL, 110.6 mmol). The reaction was stirred at rt for 16 h. Water and DCM were added to separate the phases and the aqueous phase was extracted with DCM. The combined organic extracts were dried over Na2S04, filtered and concentrated to give the title compound as a yellow solid (18.1 g, 95%). H NMR (400 MHz, CDCk) delta ppm 7.96 (s, 1 H), 6.60-6.49 (m, 1H), 5.99 (s, 1H), 3.47 (t, J = 6.0 Hz, 2H), 2.38-2.27 (m, 3H), 1.96-1.85 (m, 2H), 1.43 (s, 3H); MS ESI [M + H]+ 345.1, calcd for [Ci2Hi4BrClN40 + H]+ 345.0.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,114040-06-1, 3-Bromo-5,7-dichloropyrazolo[1,5-a]pyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; UNIVERSITY HEALTH NETWORK; LAUFER, Radoslaw; NG, Grace; LI, Sze-Wan; PAULS, Heinz W.; LIU, Yong; PATEL, Narendra Kumar B.; WO2015/70349; (2015); A1;,
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 1321618-96-5, name is 4-Chloro-5-methylfuro[2,3-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows. Application In Synthesis of 4-Chloro-5-methylfuro[2,3-d]pyrimidine

To a solution of 4-chloro-5-methylfuro[2,3-d]pyrimidine (12, 85 mg, 0.5 mmol) and 4-methoxy-N-methylaniline (5, 80 mg, 5.75 mmol) in 2 mL of anhydrous isopropanol (IPA) added 2 drops of concentrated HC1 and the reaction mixture was stirred at room temperature overnight. The brown precipitate was collected by filtration, washed with cold isopropanol, and dried under vacuum to afford compound 2 (95 mg, 75 %) as brown solid. Analytical data of compound 2 is identical with the product obtained using previous method.12

With the rapid development of chemical substances, we look forward to future research findings about 1321618-96-5.

Reference:
Patent; THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK; KUMAR, Dileep; MANN, J., John; (109 pag.)WO2019/89575; (2019); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 89792-07-4, 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 89792-07-4, name is 2-Methyl-7H-pyrrolo[2,3-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

An equal volume of dichloromethane (50 ml) and tetrahydrofuran (50 ml) were mixed,The compound 2-methyl-7H- [2,3-d] pyrrolopyrimidine (10 mmol) was added to the system,After stirring for 20 minutes,System cooling to 0-5 ,JoinTribromopyridinium(20 mmol),The system continues at 0-5 CStirring for 1 hour,The reaction mixture was slowly added to an aqueous solution of saturated sodium carbonate. The system was stirred at 20 C overnight and under reduced pressure Filtered, washed with water, dried at 55 C,To give 1.8 g of a yellow solid 4-bromo-2-methyl-7H- [2,3-d] pyrrolopyrimidine in 85% yield.

According to the analysis of related databases, 89792-07-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Liu Shuangwei; (11 pag.)CN106967073; (2017); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 220041-42-9, 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. 220041-42-9, name is tert-Butyl 2-chloropyrimidine-4-carboxylate. A new synthetic method of this compound is introduced below.

In a 20 mE vial under nitrogen, tert-butyl 2-chloropyrimi- dine-4-carboxylate (0.200 g, 0.932 mmol), 4-methylpiperi- din-3-ol hydrochloride (0.185 g, 1.220 mmol) and triethylamine (0.52 mE, 3.73 mmol) were added to THF (14 mE) and the resulting mixture was stirred at 80 C. for 16 h. The cooled mixture was concentrated in vacuo and the residuewas purified on the ISCO using a 25 g Innoflash column (Hexane/EtOAc) to give tert-butyl 2-(3-hydroxy-4-methyl-piperidin-1-yl)pyrimidine-4-carboxylate (0.269 g, 98%) as ayellow oil which was a mixture of diastereomers. EC (Analytical MethodA): 2.081 mi ECMS (APCI): calcd forC,5H24N303 [M+H] mlz 294.18; found 294.2. ?H NMR (400 MHz, CDC13) 0 8.45 (d, J=4.7 Hz, 1H), 7.02 (d, J=4.7Hz, 1H), 4.87 (ddd, J=1.6, 4.5, 12.7 Hz, 1H), 4.74-4.63 (m, 1H), 3.30 (tt, J=4.8, 9.4 Hz, 1H), 2.98 (ddd, J=2.7, 12.1, 13.3Hz, 1H), 2.84 (dd, J=10.0, 12.7 Hz, 1H), 1.87-1.74 (m, 1H),1.70 (d, J=4.7 Hz, 1H), 1.66-1.57 (m, 1H), 1.61 (s, 9H),1.36-1.20 (m, 1H), 1.10 (d, J=6.7 Hz, 3H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,220041-42-9, its application will become more common.

Reference:
Patent; UNIVERSITE DE MONTREAL; Martel, Alain; Tremblay, Francois; (65 pag.)US9598419; (2017); B1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 99420-75-4, 5-Methylpyrimidine-2-carboxylic acid, 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, Safety of 5-Methylpyrimidine-2-carboxylic acid, blongs to pyrimidines compound. Safety of 5-Methylpyrimidine-2-carboxylic acid

To a solution of methanol (50 mL) was added SOCl2 (5.17 g, 43.5 mmol, 3.00 equiv) dropwise at 0 C. The resulting solution was stirred for 0.5 h at 25 C. This was followed by the addition of 5-methylpyrimidine-2-carboxylic acid [Example 9, Step 1] (2 g, 14.5 mmol, 1.00 equiv). The resulting solution was stirred for 1 h at 65 C. The resulting mixture was concentrated under vacuum to remove methanol and SOCl2. The resulting solution was diluted with H2O (30 mL). The resulting solution was extracted with ethyl acetate (3×30 mL). The organic layers were dried over anhydrous sodium sulfate and concentrated under vacuum to afford 2 g (90.7%) of methyl 5-methylpyrimidine-2-carboxylate as a yellow solid. LC-MS: m/z=153 [M+H]+.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,99420-75-4, 5-Methylpyrimidine-2-carboxylic acid, and friends who are interested can also refer to it.

Reference:
Patent; Auspex Pharmaceuticals, Inc.; ZHANG, Chengzhi; (94 pag.)US2018/79742; (2018); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 926304-76-9, 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 926304-76-9 as follows.

To a solution of the above pyrimidine (428 mg, 1.38 mmol), bis(triphenylphosphine)palladium(II) dichloride (145 mg, 0.207 mmol) and LiCl (289 mg, 6.9 mmol) in degassed DMF (5 mL) was added tributyl(vinyl)tin (0.48 mL, 1.64 mmol) and the mixture was heated at 1000C overnight. Standard work-up and purification afforded 4-(5- vinyl-pyrimidin-2-yloxy)-benzoic acid methyl ester (210 mg, 59%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,926304-76-9, its application will become more common.

Reference:
Patent; ANORMED INC.; WO2007/22371; (2007); A2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Electric Literature of 20651-30-3, Adding some certain compound to certain chemical reactions, such as: 20651-30-3, name is 5-Methyl-2-(methylthio)pyrimidin-4(3H)-one,molecular formula is C6H8N2OS, 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 20651-30-3.

(4) 15 g of the Compound [156-3] was dissolved in 50 mL of phosphorus oxychloride, and the solution was stirred at 120°C for 2 hours. The reaction solution was immersed in broken ice, extracted with chloroform, filtered, concentrated, and purified by silica gel column chromatography to obtain 13 g of the target compound [156-4]. [Show Image] The spectral data of the compound represented by the above Formula [156-4] is presented below. mass: 175 (M+1)+.

According to the analysis of related databases, 20651-30-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; BANYU PHARMACEUTICAL CO., LTD.; EP1754706; (2007); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Application of 31462-58-5, 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 31462-58-5, name is 5-Iodopyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

Example 10; Example 10.1; General Route; N-(1-(4-((4-(Pyrimidin-5-yloxy)phenyl)ethynyl)phenyl)propan-2-yl)acetamide; 28.1 mg (0.14 mmol) 5-iodopyrimidine, 40.0 mg (0.14 mmol) N-(1-(4-((4-hydroxy-phenyl)ethynyl)phenyl)propan-2-yl)acetamide (I76.1), 1.30 mg (0.07 mmol) CuI, 1.9 mg (0.14 mmol) N,N-dimethylglycine hydrochloride and 58.7 mg (0.18 mmol) Cs2CO3 are added to 1 mL dioxane. The reaction mixture is stirred at 90 C. for 2 h then filtered through a plug of silica gel and washed with DMF. The filtrate is purified by HPLC (MeOH/H2O/TFA).C23H21N3O2 (M=371.4 g/mol)ESI-MS: 372 [M+H]+ Rt (HPLC): 2.22 min (method M)

According to the analysis of related databases, 31462-58-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; US2012/214785; (2012); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 38275-61-5 ,Some common heterocyclic compound, 38275-61-5, molecular formula is C5H3ClN2O2, 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.

5-Chloro-pyrimidine-2-carboxylic acid {4-[2-((S)-2-amino-4,5-dihydro-oxazol-4-yl)-ethyl]-phenyl}-amide The title compound was obtained in analogy to example S3 using 5-chloropyrimidine-2-carboxylic acid (CAS 38275-61-5) instead of 4-chlorobenzoic acid in step c). White solid. MS (ISP): 348.3 ([{37Cl}M+H]+), 346.1 ([{35Cl}M+H]+).

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. 38275-61-5, 5-Chloropyrimidine-2-carboxylic acid, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Hoener, Marius; Raab, Susanne; Risterucci, Celine; Sewing, Sabine; US2012/28964; (2012); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 274-71-5, 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. 274-71-5, name is Pyrazolo[2,3-a]pyrimidine, molecular formula is C6H5N3, 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.

To a solution of pyrazolo[1,5-ajpyrimidine (1 g, 8.39 mmol) in acetonitrile (5 mL) was added NBS (1.494 g, 8.39 mmol) and the reaction mixture stirred at room temperature for 8 h. The reaction mixture was concentrated under reduced pressure and the residue purified by silica gel chromatography (0-30% petroleum ether/EtOAc) to afford 3-bromopyrazolo[1,5-ajpyrimidine (1.2 g, 6.06 mmol, 72% yield) as a brown solid. LCMS (ESI) m/e 198.0 [(M+H), calcd for C6H5BrN3198.01; LC/MS retention time (method A2): tR = 1.43 mm.

According to the analysis of related databases, 274-71-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; BRONSON, Joanne J.; CHEN, Ling; DITTA, Jonathan L.; DZIERBA, Carolyn Diane; JALAGAM, Prasada Rao; LUO, Guanglin; MACOR, John E.; MAISHAL, Tarun Kumar; NARA, Susheel Jethanand; RAJAMANI, Ramkumar; SISTLA, Ramesh Kumar; THANGAVEL, Soodamani; (318 pag.)WO2017/59080; (2017); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia