Tag: M.W:100-200

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. 17180-94-8, name is 5-Chloropyrimidine, the common compound, a new synthetic route is introduced below. Safety of 5-Chloropyrimidine

A 100 mL round-bottom flask was charged with 5-chloropyrimidine (5 mmol), phenylboronic acid (1.22 g, 10 mmol), PPh3 (265 mg, 1 mmol) and Pd(OAc)2 (224 mg, 1 mmol) in dioxide (50 mL) under nitrogen at room temperature. After stirring for 30 minutes, Na2C03 (159 mg, 7.5 mmol) and H20 (10 mL) were added and the resulting mixture was heated at reflux for 3 h. After cooling to rt, the reaction mixture was poured into water and extracted with EtOAc (3 x 50 mL). The combined organic layers were washed with brine (3 x 50 mL) and dried over anhydrous Na2S04. After filtration and concentration, the crude product was purified by column chromatography to give the title compound.

The synthetic route of 17180-94-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SUNOVION PHARMACEUTICALS INC.; CAMPBELL, John, Emmerson; CAMPBELL, Una; HANANIA, Taleen, G.; SHAO, Liming; WO2013/119895; (2013); 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. 216309-28-3, name is 5-((Trimethylsilyl)ethynyl)pyrimidine. A new synthetic method of this compound is introduced below., Recommanded Product: 216309-28-3

b) 5-Ethynyl-pyrimidine; Potassium carbonate (7.38 g, 53.4 mmol) was added in one portion to a stirred solution of 5-trimethylsilanylethynyl-pyrimidine (4.71 g, 26.7 mmol) in methanol (10 ml). The reaction mixture was stirred for 2 hours at room temperature then concentrated in vacuo. The residue was suspended in dichloromethane and the inorganic solids were removed by filtration. The filtrate was concentrated in vacuo to remove ca. 95percent of the solvent to afford 5-ethynyl-pyrimidine as a brown oil in crude form. This material was used in the subsequent Sonogashira reaction without further purification.

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, 216309-28-3, 5-((Trimethylsilyl)ethynyl)pyrimidine.

Reference:
Patent; Hebeisen, Paul; Roever, Stephan; US2008/70931; (2008); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 99420-75-4, 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 99420-75-4 as follows.

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]+.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,99420-75-4, its application will become more common.

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

Application of 83942-10-3, 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 83942-10-3 as follows.

EXAMPLE 1 Synthesis of 5-Chloro-4-{2-[4-(2-ethoxyethyl)-2-methylphenoxy]ethylamino}-6-methylpyrimidine (Compound No. 12) 1.6 g of 4,5-dichloro-6-methylpyrimidine was dissolved in 50 ml of toluene. 1.0 g of triethylamine and 2.2 g of 2-[4-(2-ethoxyethyl)-2-methylphenoxy]ethylamine were added to the solution, and the reaction mixture was heated under reflux for 5 hours, whilst stirring. At the end of this time, the reaction mixture was washed with water and dried over anhydrous sodium sulfate. The toluene was removed by distillation under reduced pressure, and the oily product thus obtained was subjected to column chromatography (Wakogel C-200, eluted with a 2:1 by volume mixture of toluene and ethyl acetate) to isolate the product. The crystals thus obtained were recrystallized from hexane to afford 2.6 g of the title compound as colorless needles melting at 57-58 C.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,83942-10-3, its application will become more common.

Reference:
Patent; Sankyo Company Limited; UBE Industries Limited; US4845097; (1989); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 99420-75-4, 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 99420-75-4, name is 5-Methylpyrimidine-2-carboxylic acid. This compound has unique chemical properties. The synthetic route is as follows.

To a solution of 5-methylpyrimidine-2-carboxylic acid (1 g, 7.24 mmol) in DMF (72.4 mL) was added N,O-dimethylhydroxylamine hydrochloride (0.777 g, 7.96 mmol). The mixture was cooled to 0 C and 1 -propanephosphonic acid cyclic anhydride (50 wt. % solution in EtOAc, 9.21 mL, 14.48 mmol) was added droppwise. The mixture was then allowed to warm to RT overnight. LCMS indicated complete conversion to product. The mixture was then diluted with water, extracted with CHC13 :IPA (3:1) and washed with brine, and a saturated aqueous NaHCO3 solution. The mixture was then dried over Na2 SO4, concentrated in vacuo, and purified by silica gelchromato graph (0-100% Heptanes :EtOAc) providing N-methoxy-N,5-dimethylpyrimidine-2-carboxamide (0.7 g, 3.86 mmol, 53.4 % yield). 1H NMR (500 MHz, CDC13) oe 8.61 – 8.69 (m, 2 H) 3.61 – 3.79 (m, 3 H) 3.27 – 3.47 (m, 3 H) 2.34 – 2.45 (m, 3 H). LCMS-ESI (pos.) m/z: 182.2 (M+H)t

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 99420-75-4, 5-Methylpyrimidine-2-carboxylic acid.

Reference:
Patent; AMGEN INC.; BROWN, Matthew; CHEN, Ning; CHEN, Xiaoqi; CHEN, Yinhong; CHENG, Alan C.; CONNORS, Richard V.; DEIGNAN, Jeffrey; DRANSFIELD, Paul John; DU, Xiaohui; FU, Zice; HARVEY, James S.; HEATH, Julie Anne; HEUMANN, Lars V.; HOUZE, Jonathan; KAYSER, Frank; KHAKOO, Aarif Yusuf; KOPECKY, David J.; LAI, Su-Jen; MA, Zhihua; MEDINA, Julio C.; MIHALIC, Jeffrey T.; OLSON, Steven H.; PATTAROPONG, Vatee; SWAMINATH, Gayathri; WANG, Xiaodong; WANSKA, Malgorzata; YEH, Wen-Chen; (815 pag.)WO2018/97944; (2018); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 206564-00-3, 4-(2-Furyl)pyrimidin-2-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, 206564-00-3, blongs to pyrimidines compound. COA of Formula: C8H7N3O

General procedure: The mixture of 8 (1.0 equiv) and 2-amino-pyrimidine derivatives 4-6 (1.0 equiv) in toluene was heated to reflux. Along with the azeotrope of ethanol and toluene was distilled out of the reaction system continuously, a small amount of fresh toluene was added if necessary. Heating was stopped until the complete consumption of 8 which was indicated by TLC. After the reaction mixture was cooled to room temperature, the forming precipitate was collected by suction filtration and washed with small amounts of toluene and ethyl acetate to afford desired compounds 9-11. They could be further purified on silica gel column chromatography (eluted by acetone with petroleum ether).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,206564-00-3, its application will become more common.

Reference:
Article; Chen, Wei; Li, Yuxin; Zhou, Yunyun; Ma, Yi; Li, Zhengming; Chinese Chemical Letters; vol. 30; 12; (2019); p. 2160 – 2162;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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. 675-11-6, name is 4,6-Difluoropyrimidin-2-amine, the common compound, a new synthetic route is introduced below. Computed Properties of C4H3F2N3

EXAMPLE 3 Preparation of 2-amino-4-fluoro-6-propyloxypyrimidine (Variant A) STR11 29 4 g (0.3 mol) of potassium propylate were reacted as in Example 1 with 39.3 g (0.3 mol) of 2-amino-4,6-difluoropyrimidine in a total of 400 ml of n-propanol. The solvent was removed from the reaction mixture under reduced pressure, and the residue was washed with petroleum ether. It was subsequently stirred in water, filtered off, washed and dried, resulting in 36.1 g (70% of theory) of the title compound of melting point 63-66 C.

The synthetic route of 675-11-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BASF Aktiengesellschaft; US5011927; (1991); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 13053-88-8, N-(Pyrimidin-2-yl)acetamide, 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, COA of Formula: C6H7N3O, blongs to pyrimidines compound. COA of Formula: C6H7N3O

A solution of 2-ampy (0.15 g, 1.59 mmol) in ethanol (10 cm3)was added to a solution of Na2PdCl4 (0.234 g, 0.796 mmol) inmethanol (10 cm3). The mixture was stirred at room temperaturefor 2 h. The yellow solid thus formed was filtered off, washed withmethanol and dried under vacuum 3: Yellow solid, 95%. Anal. Calc. for C12H14N6O2PdCl2: C, 31.9; H,3.1; N, 18.6. Found: C, 32.0; H, 3.4; N, 18.3%. IR: 3267m, 3227m,3078m, 2925m, 1693s, 1517m, 516m, 355m cm1. 1H NMR(DMSO-d6): d 10.55 (s, 2H, NH), 8.63 (d, 1H, pym-H), 7.15 (t, 1H,pym-H), 2.16 (s, 2H, CH3) ppm, 3J(HH) = 4.8 Hz. Melting point:234-236 C.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,13053-88-8, N-(Pyrimidin-2-yl)acetamide, and friends who are interested can also refer to it.

Reference:
Article; Al-Jibori, Subhi A.; Al-Jibori, Qusay K.A.; Schmidt, Harry; Merzweiler, Kurt; Wagner, Christoph; Hogarth, Graeme; Inorganica Chimica Acta; vol. 402; (2013); p. 69 – 74;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Application of 69785-94-0, 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. 69785-94-0, name is 5-Aminopyrimidin-4(3H)-one, molecular formula is C4H5N3O, 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.

A mixture of 5-aminopyrimidin-4-ol (300 mg, 2.70 mmol), 2-bromopyridine (640 mg, 4.05 mmol), N1,N2-dimethylethane-1,2-diamine (0.115 mL, 1.080 mmol), copper (I)15 iodide (103 mg, 0.540 mmol), and potassium carbonate (746 mg, 5.40 mmol) in 1,4- dioxane (12 mL) in a pressure tube was heated at 110 C for 16 h. The reaction mixture was diluted with ethyl acetate (30 mL) and filtered through Celite. The filtrate was concentrated under vacuum. The residue was subjected to ISCO (80 g silica gel, solid loading, 2-7% MeOH/CH2C12) to provide the desire product, 5-amino-3-(pyridin-2-20 yl)pyrimidin-4(3H)-one (0.3 80 g, 2.0 19 mmol, 74.8 % yield), as a white solid.

According to the analysis of related databases, 69785-94-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; LIU, Chunjian; LIN, James; MOSLIN, Ryan M.; WEINSTEIN, David S.; TOKARSKI, John S.; WO2015/89143; (2015); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 55405-67-9 ,Some common heterocyclic compound, 55405-67-9, molecular formula is C6H4BrN3, 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.

Water (160 mL) was added dropwise at room temperature to a mixture of 4-ethoxycarbonylphenylboronic acid (50 g, 0.26 mol), 3-bromopyrazolo[1,5-a]pyrimidine (56.25 g, 0.28 mol), Pd(ddpf)Cl2.CH2Cl2 (4.25 g, 5.21 mmol), and Cs2CO3 (169.42 g, 0.52 mol) in 1,4-dioxane (1 L). The reaction mixture was then heated 85 C. for 4 h. The reaction mixture was cooled, poured into water and extracted with EtOAc (2×300 mL). The combined organic layers were dried over Na2SO4, filtered, and the filtrate was concentrated under reduced pressure. The crude product was purified by silica gel chromatography eluting with a gradient of petroleum ether: EtOAc (100:10 to 3:1) to deliver the title compound (64 g, 93%) as a yellow solid. [0400] 1H NMR (400 MHz, CDCl3) delta 8.73 (d, 1H), 8.63 (d, 1H), 8.52 (s, 1H), 8.20-8.09 (m, 4H), 6.92 (dd, 1H), 4.41 (q, 2H), 1.43 (t, 3H).

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. 55405-67-9, 3-Bromopyrazolo[1,5-a]pyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Pfizer Inc.; Darout, Etzer; Dullea, Robert; Hawkins, Julie Jia Li; Londregan, Allyn T.; Loria, Paula M.; Maguire, Bruce; McClure, Kim F.; Petersen, Donna N.; Piotrowski, David W.; US2014/315928; (2014); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia