Pyrimidines

Reference of 5399-92-8, 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 5399-92-8, name is 4-Chloro-1H-pyrazolo[3,4-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

Preparation of 1H-Pyrazolo[3,4-d]pyrimidine: 4-Chloro-1H-pyrazolo[3,4-d]pyrimidine Pd(OH)2 and are combined in methanol in a reaction vessel. The reaction vessel is evacuated and backfilled with hydrogen gas and the resultant mixture is stirred at rt for several hours. The resultant mixture is filtered and concentrated in vacuo to provide the dehalogenated product, which was used without further purification.

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 5399-92-8, 4-Chloro-1H-pyrazolo[3,4-d]pyrimidine.

Reference:
Patent; ChemoCentryx, Inc.; US2007/10523; (2007); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 696-45-7, 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 696-45-7, name is 4-Amino-6-methoxypyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

Step A: 4-Isothiocyanato-6-methoxypyrimidine To a bright orange solution of 1,1′-thiocarbonyldipyridin-2(1H)-one (1.86 g, 7.99 mmol) in dichloromethane at room temperature was added 6-methoxypyrimidin-4-amine (1 g, 8 mmol). The orange solution was stirred at room temperature for 18 hours. The LC/MS showed the desired product as one of the major peaks. The deep orange solution was concentrated and the remaining residue was filtered. The filtrate was purified by silica gel chromatography (10-50percent ethyl acetate/hexanes) to afford 4-isothiocyanato-6-methoxypyrimidine (0.72 g, 4.3 mmol, 54percent yield) as a yellow oil. 1H NMR (400 MHz, DMSO-d6) delta ppm 8.49 (1H, d, J=5.79 Hz), 6.95 (1H, d, J=5.79 Hz), 3.92 (3H, s). MS (LC/MS) R.T.=3.15; [M+H]+=168.1.

According to the analysis of related databases, 696-45-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Bristol-Myers Squibb Company; US2009/270405; (2009); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.180869-36-7, name is 4-(Dimethoxymethyl)-2-(methylthio)pyrimidine, molecular formula is C8H12N2O2S, molecular weight is 200.26, as common compound, the synthetic route is as follows.Safety of 4-(Dimethoxymethyl)-2-(methylthio)pyrimidine

b 2-Methylthiopyrimidine-4-carboxaldehyde The product of example 1(a) (9.96 g, 50 mmol), and 3 N HCl (42 mL, 126 mmol) were combined and stirred at 48 C. for 16 h, cooled to 23 C., combined with EtOAc (200 mL) and made basic by the addition of solid Na2 CO3 (12.6 g, 150 mmol). The aqueous phase was extracted with EtOAc (4*150 mL, dried (Na2 DO4), concentrated and the residue was filtered through a pad of silica (ca 150 mL) with CH2 Cl2 to afford 7.49 g (97%) of the title compound 1 H NMR (CDCl3): delta 9.96 (s,1), 8.77 (d, 1), 7.44 (d, 1), 2.62 (s,3).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,180869-36-7, 4-(Dimethoxymethyl)-2-(methylthio)pyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; SmithKline Beecham Corporation; US6046208; (2000); A;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Application of 302964-08-5, 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. 302964-08-5, name is 2-((6-Chloro-2-methylpyrimidin-4-yl)amino)-N-(2-chloro-6-methylphenyl)thiazole-5-carboxamide. A new synthetic method of this compound is introduced below.

Example 6; Procedure for the Preparation of Dasatinib Form CA mixture of compound 1 (0.30 g, 0.76 mmol), N-(2-hydroxyethyl)piperazine (0.49 g, 3.76 mmol) and N-ethyldiisopropylamine (0.26 ml, 1.52 mmol) in DMSO (1.5 ml) was stirred at 40 C. for 3 hours. H2O was slowly added at the same temperature. The solution was slowly cooled to 0-5 C. The product was filtered off, washed with H2O and dried under reduced pressure at 40 C. for 6 hours. Yield: 0.40 g.Example 7Procedure for the Preparation of Dasatinib Form CA mixture of compound 1 (0.45 g, 1.14 mmol), N-(2-hydroxyethyl)piperazine (0.30 g, 2.30 mmol) and N-ethyldiisopropylamine (0.30 ml, 1.75 mmol) in DMSO (5 ml) was stirred at 60 C. for 2 h. H2O (4 ml) was slowly added and the solution was heated at 60 C. for 30 min. The solution was slowly cooled to 0-5 C. The product was filtered off, washed with H2O and dried on the filter. Yield: 0.39 g.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,302964-08-5, 2-((6-Chloro-2-methylpyrimidin-4-yl)amino)-N-(2-chloro-6-methylphenyl)thiazole-5-carboxamide, and friends who are interested can also refer to it.

Reference:
Patent; SIMO, Ondrej; Filipcik, Jiri; Martaus, Alexandr; Jegorov, Alexandr; Gavenda, Ales; Aronhime, Judith; Vraspir, Pavel; Koltai, Tamas; Faustmann, Jiri; Gabriel, Roman; US2009/118297; (2009); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.153435-63-3, name is 2-(Tributylstannyl)pyrimidine, molecular formula is C16H30N2Sn, molecular weight is 369.1328, as common compound, the synthetic route is as follows.SDS of cas: 153435-63-3

6.01.15.01 4-H droxy-4-pyrimidin-2-yl-piperidine-l -carboxylic acid tert-butyl ester 9.9 mL 1.6 mol/L n-buthyllithium solution in hexane was added to 3.85 g 2-tributyl stannanyl- pyrimidine at -78 C. The reaction was stirred 30 min. at -78 C and 2.1 g 1- carboxylic acid tert- butyl ester-4-piperidone in 10 mL THF was added. The reaction mixture was warmed up and stirred at RT over night. Then, the reaction was cooled to 0 C, water and subsequently EtOAc were added and the layers were seperated. The organic layer was washed with water and with a saturated ammonia chloride solution. Then, the organic layer was dried and evaporated. The residue was purified by HPLC to yield 448 mg of the desiered product. Rt: 1.21 min (method B), (M+H)+: 280

At the same time, in my other blogs, there are other synthetic methods of this type of compound,153435-63-3, 2-(Tributylstannyl)pyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; GRAUERT, Matthias; BISCHOFF, Daniel; DAHMANN, Georg; KUELZER, Raimund; RUDOLF, Klaus; WELLENZOHN, Bernd; WO2013/83741; (2013); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 4869-46-9, 1,3-Dimethyluracil-5-carboxaldehyde, 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, Formula: C7H8N2O3, blongs to pyrimidines compound. Formula: C7H8N2O3

General procedure: A solution of sodium acetate trihydrate (0.41 g, 3 mmol) and NH2OH*HCl (0.37 g, 2.25 mmola) in H2O (3 mL) was added to a suspension of uracil 3 (0.34 g, 2 mmol) in EtOH (5 mL) while stirring at room temperature. After a few minutes a white solid started to precipitate and the stirring was continued for 24 h. A progress of the reaction was monitored by TLC (EtOAc : n-hexane, 2:1). The solid consisting of a mixture of two isomeric oximes was isolated in yield of 93% (0.34 g). The E/Z isomers were separated on silica gel column using MeOH : CHCl3 (5 :95, v/v) as an eluent. When the time of synthesis was extended to 48 h Z-isomer was obtained exclusively.

The synthetic route of 4869-46-9 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Jakubiec, Dominika; Przypis, ?ukasz; Suwi?ski, Jerzy W.; Walczak, Krzysztof Z.; Arkivoc; vol. 2017; 2; (2016); p. 149 – 161;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 355806-00-7, (3R,5S,6E)-7-[4-(4-Fluorophenyl)-6-isopropyl-2-[(methanesulfonyl) methylamino]pyrimidin-5-yl]-3,5-dihydroxyhept-6-enoic acid tert-butyl ester, 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, Quality Control of (3R,5S,6E)-7-[4-(4-Fluorophenyl)-6-isopropyl-2-[(methanesulfonyl) methylamino]pyrimidin-5-yl]-3,5-dihydroxyhept-6-enoic acid tert-butyl ester, blongs to pyrimidines compound. Quality Control of (3R,5S,6E)-7-[4-(4-Fluorophenyl)-6-isopropyl-2-[(methanesulfonyl) methylamino]pyrimidin-5-yl]-3,5-dihydroxyhept-6-enoic acid tert-butyl ester

Example 3; Hydrolysis of terf-butyl ester of rosuvastatin in a solution of strong organic nitrogen bases; The solution of terf-butyl ester of rosuvastatin in a mixture of a base, tetrahydrofuran and water in the ratio of 1:6:15 by volume is stirred at 50C for few hours. The reaction mixture is sampled and analysed by HPLC to find out the completion of reaction. Results are shown in Table 2. EPO

The synthetic route of 355806-00-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; LEK PHARMACEUTICALS D.D.; WO2006/136407; (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. 105806-13-1, name is 4,6-Dichloro-5-fluoro-2-methylpyrimidine. A new synthetic method of this compound is introduced below., Recommanded Product: 105806-13-1

Part I: (9aS)-8-(6-Chloro-5-fluoro-2-methyl-4-pyrimidinyl)octahydropyrazino[2,1 – c][1 ,4]oxazine To a mixture of (9aS)-octahydropyrazino[2,1 -c][1 ,4]oxazine dihydrochloride (23.28 g, 108.2 mmol) in DCM (360 mL) was added 4,6-dichloro-5-fluoro-2- methylpyrimidine (19.59 g, 108.2 mmol) and N,N-diisopropylethylamine (68 mL, 390.4 mmol). The mixture was stirred for 2 h, and the resulting solution was diluted with DCM (100 mL) and washed with saturated aq. NaHC03 (200 mL). The aqueous phase was extracted with a fresh portion of DCM (100 mL), and this organic phase was washed with saturated aq. NaHC03 (50 mL). The combined organic phase was dried over anhydrous Na2S04, filtered, and concentrated in vacuo to give (9aS)-8-(6-chloro-5- fluoro-2-methyl-4-pyrimidinyl)octahydropyrazino[2,1 -c][1 ,4]oxazine as a light yellow oil that was used without further purification. LCMS: (M+H)+: 287.1.

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, 105806-13-1, 4,6-Dichloro-5-fluoro-2-methylpyrimidine.

Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY (NO. 2) LIMITED; AUBART, Kelly, Marshall; GILLIAN, Jason, Michael; QIN, Donghui; MCKEOWN, Robert, Rahn; WILLIAMS, Glenn, R.; WO2013/82388; (2013); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Electric Literature of 914612-23-0, Adding some certain compound to certain chemical reactions, such as: 914612-23-0, name is 6-Benzyl-4-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine,molecular formula is C14H14ClN3, 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 914612-23-0.

Method J (Compound 13)5-Chloro-2-(4-((6-methoxypyridin-3-yl)methylamino)-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)benzonitrile A) 6-Benzyl-N-((6-chloropyridin-3-yl)methyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-amineA mixture of 6-benzyl-4-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine (2.5 g, 9.6 mmol), 2-chloro-5-aminomethylpyridine (2.7 g, 19 mmol), acetonitrile (10 mL), and N,N-diisopropylethylamine (3.4 mL, 19 mmol) was subjected to microwave irradiation at 180 C. for 2 h. After standing at rt overnight, the precipitated solids were collected by filtration and washed with cold acetonitrile (5 mL×2), and dried to yield a yellow powder (2.8 g, 77%).LC-MS: 366.3 [M+H]+ 1H NMR (400 MHz, d6-DMSO): delta 8.34 (d, 1H, J=2.8 Hz), 8.23 (s, 1H), 7.74 (dd, 1H, J=8.4, 2.8 Hz), 7.45-7.25 (m, 7H), 4.56 (d, 2H, J=6.0 Hz), 3.72 (s, 2H), 3.36 (s, 2H), 2.72-2.62 (m, 4H).

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. 914612-23-0, 6-Benzyl-4-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Wei, Zhi-Liang; O’Mahony, Donogh John Roger; Duncton, Matthew; Kincaid, John; Kelly, Michael G.; Wang, Zhan; US2008/275037; (2008); 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. 2227-98-7, name is 4-Aminopyrrolo[3,2-d]pyrimidine, molecular formula is C6H6N4, 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. Product Details of 2227-98-7

[0077] (2S)-2-[({4-Amino-5H-pyrrolo[3,2-d]pyrimidin-7-yl}methyl)amino]heptan-l- ol (S.2). Compound S.l (0.358 g, 1.32 mmol) was dissolved in MeOH (4 mL) and aq. hydrochloric acid (36%, 1 mL) added. After 15 min the solvent was evaporated to a colourless solid that was dissolved in MeOH (10 mL), neutralized with Amberlyst A21 resin then passed through a short column of the same resin and eluted with MeOH. The fractions containing product were evaporated to an oily residue that was dissolved in tert-butanol (4 mL) then 9-deazaadenine (0.177 g, 1.32 mmol) and aq. formaldehyde solution (0.12 mL, 1.59 mmol) were added and the mixture stirred at 70 C for 16 h. Silica gel was added to absorb all the solvent then the solvent was evaporated and the residue chromatographed on silica gel (gradient of 5 – 15% 7M NH3/MeOH in CHC13) to give S.2 as a colourless solid (0.122 g, 33%). NMR (500 MHz, CD3OD): delta 8.16 (s, 1H), 7.47 (s, 1H), 3.64 (dd, J = 1 1.2, 4.5 Hz, 1H), 3.48 (dd, J = 11.2, 6.5 Hz, 1H), 2.68-2.64 (m, 1H), 1.52-1.38 (m, 2H), 1.32-1.17 (m, 6H), 0.86 (t, J = 7.1 Hz, 3H). 13C NMR (125.7 MHz, CD3OD, centre line delta 49.0): delta 152.1 (C), 150.8 (CH), 146.6 (C), 129.0 (CH), 1 15.4 (C), 1 14.8 (C), 64.4 (CH2), 59.2 (CH), 41.2 (CH2), 33.1 (CH2), 32.0 (CH2), 26.8 (CH2), 23.6 (CH2), 14.4 (CH3). ESI-HRMS calcd for Ci4H24N50+, (M+H)+, 278.1976, found 278.1974.

With the rapid development of chemical substances, we look forward to future research findings about 2227-98-7.

Reference:
Patent; ALBERT EINSTEIN COLLEGE OF MEDICINE OF YESHIVA UNIVERSITY; SCHRAMM, Vern, L.; CLINCH, Keith; GULAB, Shivali, Ashwin; WO2015/123101; (2015); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia