Tag: M.W:100-200

Application of 35733-53-0, 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. 35733-53-0, name is 2,4-Dimethylpyrimidin-5-amine, molecular formula is C6H9N3, 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.

Under Ar(g), to a mixture of 2-chloropyrazine (1) (252mg, 2.2mmol), 2,4- dimethyl-5-pyrimidinamine (2) (246mg, 2.0mmol), Cs2C03 (1.30g, 4.0mmol) was added degassed dry 1 ,4-dioxane (13mL). The reaction mixture was then flushed with Ar(g) for 1 min before Pd2(dba)3 (92mg, 0.1 mmol) and Xantphos (127mg, 0.22mmol) were added. The reaction mixture was heated up to 90C for 40h. It was then cooled down to rt. EtOAc (15mL), H20 (10mL) and brine (5mL) were added to the reaction mixture. The organic phase was separated and the aqueous phase was extracted with EtOAc (15mL). The organic layers were combined and Pd-scavenger (MP-TMT, ~400mg, 1.3mmol/g) was added. This was shaken for several hours followed by filtration. The filtrate was concentrated in vacuo, dissolved in DMSO (4mL) and purified by basic prep LCMS to yield (3) as a solid (92mg, 23%). (0777) LCMS (ES): Found 202.4 [M+Hf.

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 35733-53-0, 2,4-Dimethylpyrimidin-5-amine.

Reference:
Patent; KARUS THERAPEUTICS LIMITED; SHUTTLEWORTH, Stephen Joseph; GATLAND, Alice Elizabeth; FINNEMORE, Daniel John; ALEXANDER, Rikki Peter; SILVA, Franck; CECIL, Alexander; (233 pag.)WO2019/166824; (2019); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Electric Literature of 30129-57-8, Adding some certain compound to certain chemical reactions, such as: 30129-57-8, name is 6-Methyl-1H-pyrazolo[3,4-d]pyrimidin-4(7H)-one,molecular formula is C6H6N4O, 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 30129-57-8.

6-Methyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidin-4-one (134 mg, 0.89 mmol.) was taken into thionyl chloride (3 mL) followed by addition of DMF (0.2 mL) and the mixture was brought to reflux over 30 minutes. The resulting solution was concentrated and the residue partitioned with ethyl acetate and saturated aqueous sodium bicarbonate. The organic phase was washed with brine then dried over anhydrous sodium sulfate, filtered and concentrated to afford a yellow oil.

According to the analysis of related databases, 30129-57-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; EXELIXIS, INC.; WO2005/117909; (2005); A2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 34253-03-7, 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 34253-03-7, name is Methyl pyrimidine-2-carboxylate. This compound has unique chemical properties. The synthetic route is as follows.

Synthesis of pyrimidin-2-ylmethanol:To a stirred solution of methyl pyrimidine-2-carboxylate (10.0 g, 72.46 mmol) in EtOH (100 mL) was added NaBH4 (3.85 g, 101.31 mmol) portion wise at 0 C under inert atmosphere. The reaction mixture was warmed to RT and stirred for 2 h. After completion of starting material by TLC, the volatiles were evaporated under reduced pressure. The residue was diluted with saturated K2C03 solution and extracted with EtOAc. The combined organic layer was dried over sodium sulphate, filtered and concentrated in vacuo to afford pyrimidin-2-ylmethanol (4.5 g, crude) as yellow semisolid. 1H-NMR (DMSO-d6, 400 MHz): delta 8.76 (d, 2H), 7.42 (t, 1H), 5.29 (br s, 1H), 4.61 (s, 2H); LC-MS: 94.12%; 111 (M++l) (column; Chromolith RP-18, (100×4.6 mm); RT 2.24 min. 5mM NH4OAc: ACN; 0.8 ml/min); TLC: 100% EtOAc (Rf: 0.2).

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 34253-03-7, Methyl pyrimidine-2-carboxylate.

Reference:
Patent; ENVIVO PHARMACEUTICALS, INC.; RIPKA, Amy; SHAPIRO, Gideon; MCRINER, Andrew; WO2012/40230; (2012); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 34253-03-7 ,Some common heterocyclic compound, 34253-03-7, molecular formula is C6H6N2O2, 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.

To a solution of methyl pyrimidine-2-carboxylate (25 g, 181 mmol, 1.0 equiv) in MeOH (500 mL) was added NaBH4 (8.2 g, 217 mmol, 1.2 equiv) at 0C. The reaction mixture was stirred at room temperature for 3 hours. The reaction mixture was quenched with EbO (10 mL), concentrated in vacuo and the residue was purified by flash column chromatography (PE/EtOAc = 1/1) to afford the title compound pyrimidin-2-ylmethanol as a yellow oil (16 g, 80% yield). (1558) LC-MS: m/z 111.0 (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,34253-03-7, its application will become more common.

Reference:
Patent; ANNAPURNA BIO, INC.; TANG, Haifeng; HANSON, Michael; BOYCE, Sarah; NIE, Zhe; (461 pag.)WO2020/73011; (2020); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 169677-66-1, 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. 169677-66-1, name is 2-Chloro-5-(cyclopropylmethoxy)pyrimidine. A new synthetic method of this compound is introduced below.

80.0 mg (0.28 mmol) of the amine VII.1, 55.8 mg (0.28 mmol) of example XII.4 and 144 muL (0.84 mmol) DIPEA in 2 mL NMP are stirred at 100 C. for 30 min. The reaction mixture is directly purified by HPLC (ACN/H2O/NH3).For example 6.7 the reaction conditions are 150 C. over night.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,169677-66-1, its application will become more common.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; FLECK, Martin; HEIMANN, Annekatrin; HEINE, Niklas; NOSSE, Bernd; ROTH, Gerald Juergen; US2014/315882; (2014); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 17180-94-8, name is 5-Chloropyrimidine. This compound has unique chemical properties. The synthetic route is as follows. Recommanded Product: 17180-94-8

2-Phenoxypyrimidine. (Intermediate AY) A mixture of 5-chloropyrimidine (5.00 g, 0.0437 mol), phenol (5.38 g, 57.2 mmol), dibenzo-18-Crown-6 (0.84 g, 0.0023 mol) and ground potassium hydroxide (5.92 g, 0.1055 mol) in toluene (75 ml) was heated at reflux for 3 hours with azeotropic removal of water. The mixture was allowed to cool to ambient temperature and the solvent was removed under reduced pressure. The residue was partitioned between water and chloroform. The layers were separated and the aqueous phase was extracted with chloroform three times. The combined organic layers were dried over magnesium sulfate, filtered and evaporated to give 2-phenoxypyrimidine as a white powder (95% pure, 4.56 g, 0.0265 mol): 1H NMR (CDCl3, 400 MHz) 8.57 (d, 2H), 7.43 (t, 2H), 7.26 (t, 1H), 7.20 (d 2H); TLC (n-heptane/ethyl acetate=1:1) Rf 0.42.

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, 17180-94-8, 5-Chloropyrimidine.

Reference:
Patent; Abbott Laboratories; US6921763; (2005); B2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Application of 34253-03-7, 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 34253-03-7 as follows.

Synthesis of pyrimidin-2-ylmethanol:To a stirred solution of methyl pyrimidine-2-carboxylate (10.0 g, 72.46 mmol) in EtOH (100 mL) was added NaBH4 (3.85 g, 101.31 mmol) portion wise at 0 C under inert atmosphere. The reaction mixture was warmed to RT and stirred for 2 h. After completion of starting material by TLC, the volatiles were evaporated under reduced pressure. The residue was diluted with saturated K2C03 solution and extracted with EtOAc. The combined organic layer was dried over sodium sulphate, filtered and concentrated in vacuo to afford pyrimidin-2-ylmethanol (4.5 g, crude) as yellow semisolid. 1H-NMR (DMSO-d6, 400 MHz): delta 8.76 (d, 2H), 7.42 (t, 1H), 5.29 (br s, 1H), 4.61 (s, 2H); LC-MS: 94.12%; 111 (M++l) (column; Chromolith RP-18, (100×4.6 mm); RT 2.24 min. 5mM NH4OAc: ACN; 0.8 ml/min); TLC: 100% EtOAc (Rf: 0.2).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,34253-03-7, its application will become more common.

Reference:
Patent; ENVIVO PHARMACEUTICALS, INC.; RIPKA, Amy; SHAPIRO, Gideon; MCRINER, Andrew; WO2012/40230; (2012); A1;,
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. 17180-94-8, name is 5-Chloropyrimidine, molecular formula is C4H3ClN2, 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. HPLC of Formula: C4H3ClN2

Take 25mL reaction flask, add 5-chloropyrimidine (22.8mg, 2.0mmol),P-methoxyphenol (37.2 mg, 3.0 mmol),CuI (19.0 mg, 0.05 mmol),N-5-methoxy-1,1-biphenyl-N’-benzylaldehyde oxalate (18.0 mg 0.05 mmol)K3PO4 (466.0 mg, 2.2 mmol),The reaction flask was then evacuated and backfilled with argon three times, adding 5.0 mL of dimethylsulfoxide Sulfone as a solvent. The reaction mixture was stirred at 120 C for 30 hours. Upon completion of the reaction, after cooling to room temperature, the crude product was added to ethyl acetate and transferred to a separatory funnel, brine was added, and the organic phase was extracted and combined. The organic phase was dried over anhydrous MgSO4 and concentrated in vacuo. The residue was separated through a plug of silica gel to give the corresponding 5- (4-methoxyphenyl) pyrimidine as a yellow oil (28.3 mg, 70%).

With the rapid development of chemical substances, we look forward to future research findings about 17180-94-8.

Reference:
Patent; Funing Xunpeng New Materials Technology Co., Ltd.; Cao Shuguang; (8 pag.)CN106496109; (2017); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 38275-42-2, 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 38275-42-2, name is 5-Chloro-2-(methylthio)pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

n-Butyllithium (5.4 mL, 1.6 M in hexanes, 8.63 mmol) was added dropwise to a solution of 2-(2-(4-fluorobenzyl)thiophen-3-yl)ethanol (0.97 g, 4.11 mmol) in anhydrous tetrahydrofuran (15 mL) at -78 C. The resulting mixture was stirred at -78 C for 1 h and then a solution of 5-chloro-2-(methylthio)pyrimidine (0.79 g, 4.93 mmol) in 1 mL of tetrahydrofuran was added slowly. The mixture was stirred at -78 C for 1 h and then at -40 C for 2 h. The reaction was quenched with a solution (1.1 mL) of acetic acid and methanol (1:1) at -40 C and then a solution of 2,3-dichloro-5,6-dicyano-l,4- benzoquinone (0.1.1 g, 4.93 mmol) in tetrahydrofuran (1 mL) was added. After complete addition the reaction was stirred at -40 0C for 1 h, then warmed to rt. 10 mL of aqueous sodium hydroxide (2 M) and 50 mL of water were added and the mixture was extracted with ethyl acetate (3 x 50 mL). The combined organic layers were washed with brine (80 mL), dried over anhydrous sodium sulfate and filtered. The solvent was evaporated in vacuo and the product purified by flash chromatography eluting with ethyl acetate / hexane (1 :4) to afford the title compound (0.45 g, 28%). MS (M+H)+ 395/397.

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 38275-42-2, 5-Chloro-2-(methylthio)pyrimidine.

Reference:
Patent; AMGEN, INC.; WO2006/66172; (2006); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Electric Literature of 77994-12-8, 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 77994-12-8, name is 2,5-Diaminopyrimidin-4(3H)-one. This compound has unique chemical properties. The synthetic route is as follows.

The water separator is arranged in the reaction vessel by adding the mass fraction of in 75percent cyclohexane 130 ml, phenyltheophylline methanol (3) 0.62mol, solid sodium sulfite 0.13mol, control the stirring speed 180rpm, raising the temperature of the solution 65 °C, heating 4h, the temperature of the solution is then reduced to 45 °C, by adding 2,5-diamino-pyrimidin-4-one (2) 0.73mol, continue to reflux reaction 6h, added after cooling the mass fraction of 15percent sodium chloride solution 300 ml, separating an aqueous layer, the organic layer used for quality score 65percent acetonitrile extraction, merged layer, 68kPa low-pressure distillation until the solution is clarified, reducing the temperature of the solution to 20 °C, by adding the mass fraction is 28percent oxalic acid solution is adjusted to pH 2, separating solid, filtering, in the mass fraction is 95percent nitromethane recrystallizing, to obtain crystal 2-benzyloxy-5-amino-pyrimidin-4-one 124.12g, yield 91percent.

According to the analysis of related databases, 77994-12-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Chengdu Science and Technology Co., Ltd. Chester; Peng, Fei; (5 pag.)CN105503740; (2016); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia