Tag: M.W:100-200

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.13040-89-6, name is 5-Chloro-6-methylpyrimidin-4-amine, molecular formula is C5H6ClN3, molecular weight is 143.57, as common compound, the synthetic route is as follows.Product Details of 13040-89-6

To a solution of 1,1-dimethylethyl (25)-2-(3-bromo-2-oxopropyl)-l-piperidinecarboxylate D2 (0.10 g, 0.31 mmol) in DMF (1.50 ml) was added 5-chloro-6-methyl-4-pyrimidinamine (available from Chemstep No.19785) (0.049 g, 0.34 mmol) and the reaction mixture was stirred at 80 0C for 4 h. The solvent was removed under reduced pressure and the residue was taken-up in Et2O. The organic phase was washed with water, dried (Na2SO4), filtered and evaporated under reduced pressure. The residue was eluted through a SCX column to afford a crude material (0.021 g) containing the title compound D7, the corresponding N- Boc protected derivative and some residual 5-chloro-6-methyl-4-pyrimidinamine. [N-Boc derivative data. UPLC: rt = 0.71 min, peaks observed: 365 (M+l, 100%) and 367 (M+l, 33%). C18H25ClN4O2 requires 364]. The crude was dissolved in DCM (1 ml) and TFA (2 ml) was added dropwise. The reaction was left under stirring for 1 h at room temperature. Volatiles were removed under reduced pressure and the residue eluted through a SCX column (500 mg) to afford the title compound D7 (0.018 g)contaminated with some residual 5-chloro-6-methyl-4-pyrimidinamine. UPLC: rt = 0.40 min, peaks observed: 265 (M+l, 100%) and 267 (M+l, 33%). C13Hi7ClN4 requires 264.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,13040-89-6, 5-Chloro-6-methylpyrimidin-4-amine, and friends who are interested can also refer to it.

Reference:
Patent; GLAXO GROUP LIMITED; WO2009/3997; (2009); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 96225-80-8, 6-Morpholinopyrimidin-4-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, SDS of cas: 96225-80-8, blongs to pyrimidines compound. SDS of cas: 96225-80-8

2-(6-Morpholin-4-yl-pyrimidin-4-ylamino)-thiazole-5-carbonitrile (22-9) 6-Morpholin-4-yl-pyrimidin-4-ylamine (185 mg, 1.03 mmol) was stirred in 5 mL anhydrous THF under N2. Sodium hydride (82 mg, 60% dispersion, 2.05 mmol) was added and the reaction was warmed to 45 C. for 5 minutes. 2-chloro-thiazole-5-carbonitrile (208 mg, 1.44 mmol) was added and the reaction was heated to reflux. After 30 minutes added additional 2-chloro-thiazole-5-carbonitrile (85 mg, 0.59 mmol). After an additional 1 hour the reaction was cooled to room temperature, quenched with water and the THF was removed in vacuo. The mixture was neutralized with 1 M HCL and the resulting precipitate was filtered and washed with water. The solid was suspended in DMSO, filtered and washed with EtOAc to provide the title compound. 1-NMR (400 MHz, CD3OD) 8.44 (1H,s), 7.95 (1H,s), 6.13 (1H,s), 3.81 (t, 4H, J=5.0 Hz), 3.63 (t, 4H, J=4.9 Hz). M+1=289.1.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,96225-80-8, 6-Morpholinopyrimidin-4-amine, and friends who are interested can also refer to it.

Reference:
Patent; Bilodeau, Mark T.; Hartman, George D.; Hoffman JR., Jacob M.; Sisko, John T.; Manley, Peter J.; Smith, Anthony M.; Tucker, Thomas J.; Lumma JR., William C.; Rodman, Leonard; US2002/137755; (2002); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 22404-46-2, 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 22404-46-2 as follows.

A 100 mL round-bottomed flask was charged with 3- (4- (piperidin-1-yl) styryl) -2-fluoro-5- (4, 4, 5, 5-tetramethyl- 1, 3, 2-dioxaborolan-2-yl) pyridine (199 mg, 0.49 mmol), A- chloro–7~methylpyrimidin-2-amine (146 mg, 1.016 mmol) and EPO Pd(PPh3)^ (59 mg, 50.9 mumol) . Then toluene (20 mL) , EtOH (10 rtiL) and 2M aq. K2CO3 (1.53 mL, 3.05 mmol) were added and the reaction mixture was immersed in an oil bath at 120 0C for 1 h. The reaction mixture was partitioned between EtOAc (30 mL) and water ( 50 mL) and the organic layer was dried (MgSO4), filtered and concentrated and then quickly filtered through silica ( MeOH/CH?C^ gradient) . After evaporation of volatiles the residue was dissolved in dioxane (8 mL) and water (3 mL) and concentrated HCl (0.66 mL) was added. The reaction mixture was heated to 110 0C for 70 min and then evaporated. Purification by reverse phase preparative HPLC (eluting with aq. TFA/MeCN) gave the title compound (40 mg, 21%) as a yellow solid.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,22404-46-2, its application will become more common.

Reference:
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2007/27528; (2007); A2;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Related Products of 911461-47-7, 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 911461-47-7, name is 4,6-Dichloropyrimidine-5-carboxamide. This compound has unique chemical properties. The synthetic route is as follows.

4, 6-DICHLORO-PYRIMIDINE-5-CARBALDEHYDE (15.0 g, 84,75 mmol, 1.0 equivalent) was dissolved in ethyl acetate (150 mL), mixed with hydroxylamine hydrochloride in water (30ML) and added sodium acetate. Reaction was at left room temperature for 1.5 hours. Worked up with ethyl acetate, sodium bicarbonate, dried with magnesium sulfate, rotovaped and dried and high vacuum to afford a white solid (14.593 g). The white solid (iminohydroxy intermediate) was added to thionyl chloride (100 mL) at 0 C with stirring and allowed to warm to room temperature for 3 hours. The reaction was quenched in ice (500G), and the precipitated was filtered off, washed with cold water, and dried under high vacuum to afford a white solid as product (10. 739g, 72. 8%). 1H NMR 400MHZ CDC13 B (ppm): 8. 95 (s, LH, pyrimidine).

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 911461-47-7, 4,6-Dichloropyrimidine-5-carboxamide.

Reference:
Patent; ARENA PHARMACEUTICALS, INC.; WO2005/7647; (2005); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 17180-94-8, 5-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, Application In Synthesis of 5-Chloropyrimidine, blongs to pyrimidines compound. Application In Synthesis of 5-Chloropyrimidine

A solution of 5-chloropyrimidine (5 mmol) and MeONa (5.5 mmol) in THF (30 mL) was stirred overnight at 150 C. After cooling to rt, the solvent was removed and water (20 mL) was added to the residue. The resulting mixture was extracted with EtOAc (3 x 35 mL). The combined organic layers were washed with brine, and dried over anhydrous Na2S04. After filtration and concentration, the crude product was purified by column chromatography to give the title compound.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,17180-94-8, 5-Chloropyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; SUNOVION PHARMACEUTICALS INC.; CAMPBELL, John, Emmerson; CAMPBELL, Una; HANANIA, Taleen, G.; SHAO, Liming; WO2013/119895; (2013); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of 923282-39-7, 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.923282-39-7, name is 7-Chloro-1-methyl-1H-pyrazolo[4,3-d]pyrimidine, molecular formula is C6H5ClN4, molecular weight is 168.58, as common compound, the synthetic route is as follows.

Compound 10: To a solution of 3 (0.33 g, 1.0 mmol) and Hunig’s base (0.52 mL, 3.0 mmol) in 3 mL of DMF was added 9 (0.169 g, 1.0 mmol). The resulting mixture was heated and stirred at 90 C. for 1 hour. After the reaction was cooled to room temperature, water was added and washed with ethyl acetate (×3). The combined organics were washed with brine, dried (MgSO4), and concentrated under reduced pressure. The crude residue was purified by prep RP-HPLC. The fractions containing pure compound were consolidated and concentrated. The residue thus obtained was lyophilized under high-vacuum to yield 10 (59 mg, 9%) as the bis TFA salt. 1H NMR (d6-DMSO) delta 3.10-3.13 (m, 2H) 3.90-3.92 (m, 2H) 4.33 (s, 3H) 7.19 (s, 1H) 7.36 (m, 1H) 7.51-7.55 (m, 1H) 7.62-7.64 (m, 1H) 8.01 (s, 1H) 8.16 (s, 1H) 8.72 (s, 1H) 9.02 (bs, 1H) 9.57 (s, 1H); ES (+) MS m/e=463 (M+1).

Statistics shows that 923282-39-7 is playing an increasingly important role. we look forward to future research findings about 7-Chloro-1-methyl-1H-pyrazolo[4,3-d]pyrimidine.

Reference:
Patent; Sunesis Pharmaceuticals, Inc.; US2007/27166; (2007); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 16097-60-2, 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. 16097-60-2, name is 2-Amino-4-chloro-6-(trifluoromethyl)pyrimidine. A new synthetic method of this compound is introduced below.

Example 8 N4-[3-Fluoro-4-(1H-pyrrolo[2,3-b]pyridin-4-ylmethyl)phenyl]-6-(trifluoromethyl)pyrimidine-2,4-diamine 32 mg (0.11 mmol) of 3-fluoro-4-(1H-pyrrolo[2,3-b]pyridin-4-ylmethyl)aniline and 26 mg (0.12 mmol) of 4-chloro-6-(trifluoromethyl)pyrimidine-2-amine are suspended in 5 ml of water and 0.07 ml of 2N hydrochloric acid. The reaction mixture is heated at reflux for 20 hours. After cooling, the mixture is made alkaline using dilute aqueous sodium hydroxide solution, a little methanol is added and the mixture is extracted with ethyl acetate. The extract is dried over sodium sulfate and the solvent is removed under reduced pressure. The residue is purified by preparative HPLC. Yield: 24 mg (55% of theory) LC-MS (Method 2): Rt=2.05 min. MS (ESI pos.): m/z=403 [M+H]+. 1H-NMR (DMSO-d6-, 400 MHz): S=4.18 (s, 2H), 6.33 (s, 1H), 6.51 (dd, 1H), 6.82 (d, 1H), 6.93 (br. s, 2H), 7.21-7.29 (m, 2H), 7.41 (dd, 1H), 7.89 (dd, 1H), 8.11 (d, 1H), 9.72 (s, 1H), 11.60 (br. s, 1H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,16097-60-2, its application will become more common.

Reference:
Patent; Bayer HealthCare AG; US2008/269268; (2008); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Adding a certain compound to certain chemical reactions, such as: 19808-30-1, 5-Bromopyrimidin-4(3H)-one, 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, 19808-30-1, blongs to pyrimidines compound. Application In Synthesis of 5-Bromopyrimidin-4(3H)-one

EXAMPLE 12: 5-bromo-4-chloropyrimidine15 A stirred solution of 5-bromopyrimidin-4-ol (650mg, 3.73mmol) in POCI3 (in excess) was heated at 100C overnight. The reaction mixture was cooled and concentrated under reduced pressure. Crude product was dissolved in ethyl acetate and this mixture was slowly poured into saturated sodium bicarbonate solution. The ethyl acetate layer was separated and washed with brine solution, and dried over anhydrous sodium sulphate and concentrated to get the desired product 15 as yellow solid, 300mg (Yield- 43%). The product was confirmed by 1HNMR and MS spectrum analysis. 1H NMR (400 MHz, CDC13) delta: 8.86 (s, 1H), 8.82 (s, 1H); MS- 192 (M+l).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,19808-30-1, its application will become more common.

Reference:
Patent; ARRIEN PHARMAEUTICALS LLC; VANKAYALAPATI, Hariprasad; APPALANENI, Rajendra, P.; REDDY, Y., Venkata Krishna; WO2012/135631; (2012); 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.69696-37-3, name is 5-Bromo-2,4-dimethylpyrimidine, molecular formula is C6H7BrN2, molecular weight is 187.0372, as common compound, the synthetic route is as follows.Recommanded Product: 5-Bromo-2,4-dimethylpyrimidine

Intermediate B1 (0351) A mixture of B1.4 (12 g, 64 mmol), bis(pinacolato)diboron (22.8 g, 89.6 mmol, 1.4 eq), KOAc (18.8 g, 192 mmol, 3.0 eq), and Pd(dppf)Cl2 (2.34 g, 3.2 mmol) in 200 mL of anhydrous dioxane was heated at 90 C. and stirred for 4 h under N2. The solvent was removed under reduced pressure, the residue was diluted with 300 mL mixed slovent (PE:EA=4:1), filtered and concentrated. The crude product was purified by flash column chromatography (PE:EA=2:1 to 1:1) to give the title compound (10 g, 66%) as a yellow oil. LC-MS: [M+H]+=235.1.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,69696-37-3, 5-Bromo-2,4-dimethylpyrimidine, and friends who are interested can also refer to it.

Reference:
Patent; Novartis AG; CHAN, Ho Man; GU, Xiang-Ju Justin; HUANG, Ying; LI, Ling; MI, Yuan; QI, Wei; SENDZIK, Martin; SUN, Yongfeng; WANG, Long; YU, Zhengtian; ZHANG, Hailong; ZHANG, Ji Yue (Jeff); ZHANG, Man; ZHANG, Qiong; ZHAO, Kehao; (134 pag.)US2016/176882; (2016); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Application of 17758-52-0 ,Some common heterocyclic compound, 17758-52-0, molecular formula is C5H6N2O, 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.

A mixture of 5-methyl-3/-/-pyrimidin-4-one (0.60 g, 3.6 mmol) and phosphorous oxychloride (2.0 ml.) was heated at 90 0C for 2.5 h. The mixture was evaporated to dryness under reduced pressure and the resultant solid was purified by sublimation under reduced pressure to furnish the title compound as a white solid. This compound was unstable to air and was used immediately in the next step.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,17758-52-0, its application will become more common.

Reference:
Patent; CANCER RESEARCH TECHNOLOGY LIMITED; McDONALD, Edward; BLAGG, Julian; PICHOWICZ, Mark; CRUMPLER, Simon Ross; WO2010/41054; (2010); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia