Pyrimidines

Synthetic Route of 13479-88-4, 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 13479-88-4, name is 5,7-Dichlorothiazolo[5,4-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

General procedure: Example 6. General Procedure F A mixture of the desired chlorothiazolopyrimidines i-F (1 equiv), desired aminomethyl heterocycle or benzylamine ii-F (1.1 equiv), and triethylamine (NEt3) (1.5 equiv) in 1,4-dioxane (~0.1 M) was stirred at room temperature until the reaction was complete by LC-MS and/or TLC analysis. The reaction mixture was concentrated to dryness then re-dissolved in CH2Cl2 and washed with saturated NaHCO3 solution. The organic extract was dried over Na2SO4, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (typical eluents included, for example, a mixture of hexanes and EtOAc, or a mixture of CH2Cl2 and MeOH, or an 80:18:2 mixture of CH2Cl2/CH3OH/concentrated NH4OH) to afford the desired product iii-F. The product structures prepared according to General Procedure F were confirmed by 1H NMR and/or by mass analysis.

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 13479-88-4, 5,7-Dichlorothiazolo[5,4-d]pyrimidine.

Reference:
Patent; THE GENERAL HOSPITAL CORPORATION; UNITED STATES DEPARTMENT OF HEALTH AND HUMAN SERVICES; SLAUGENHAUPT, Susan, A.; JOHNSON, Graham; PAQUETTE, William, D.; ZHANG, Wei; MARUGAN, Juan; (306 pag.)WO2016/115434; (2016); A1;,
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Application of 479691-42-4, 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 479691-42-4, name is tert-Butyl 4-(4-chloropyrimidin-2-yl)piperazine-1-carboxylate. This compound has unique chemical properties. The synthetic route is as follows.

(2) 4-phenyl-2-piperazin-1-ylpyrimidine Dihydrochloride To a solution of tert-butyl 4-(4-chloropyrimidin-2-yl)piperazine-1-carboxylate (6.30 g, 20.7 mmol) and phenylboric acid (3.75 g, 31.1 mmol) in anhydrous toluene (250 ml) was added potassium phosphate (9.20 g, 41.5 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethyxanthene (480 mg, 0.83 mmol) and trisdibenzylideneacetone dipalladium (119 mg, 0.21 mmol) under nitrogen atmosphere, and the reaction was degassed and heated under reflux for 14 hours. The reaction was distilled off under reduced pressure and to the residue was added to methylene chloride and water followed by extracted. The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether:ethyl acetate=5:1) to obtain tert-butyl 4-(4-phenylpyrimidin-2-yl)piperazine-1-carboxylate (5.00 g, 70%).

According to the analysis of related databases, 479691-42-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; US2009/163508; (2009); A1;,
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Related Products of 857641-46-4, 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. 857641-46-4, name is 2-(4-Bromo-1H-pyrazol-1-yl)pyrimidine, molecular formula is C7H5BrN4, 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.

General procedure: The ligand pzpm (47.4mg, 0.32mmol) was dissolved in CH2Cl2 (10ml), and added to a suspension of [NiBr2(DME)] (100mg, 0.32mmol) in CH2Cl2 (20ml), in a Schlenk tube, under nitrogen. The reaction was stirred for 18h at room temperature. The resulting suspension was filtered and the solid product was washed twice with hexane (2×10ml) and dried in vacuum, yielding 94mg (82%) of a mustard yellow powder.

According to the analysis of related databases, 857641-46-4, the application of this compound in the production field has become more and more popular.

Reference:
Article; Moreno-Lara, Belen; Carabineiro, Sonia A.; Krishnamoorthy, Paramasivam; Rodriguez, Ana M.; Mano, Joao F.; Manzano, Blanca R.; Jalon, Felix A.; Gomes, Pedro T.; Journal of Organometallic Chemistry; vol. 799-800; (2015); p. 90 – 98;,
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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. 17321-97-0, name is 2-Amino-4-methylpyrimidine-5-carbonitrile. A new synthetic method of this compound is introduced below., Computed Properties of C6H6N4

To a stirred solution of intermediate 41B (500 g, 3730 mmol) in TI-IF (75 mL) andDMF (15 rnL) was added copper (II) bromide (16.65 g, 74.50 rnmol) and Isoamyl nitrite (7.53ml, 55,9 mmol) and the reaction was refluxed for I h. The reaction mixture was cooled to ambient temperature, concentrated to dryness, diluted with the DCM (200 mL), filtered, and washed with THF (200 ml.). The combined organic extracts were washed with 10 % Nai-1C03 (150 mL). Then brine (50 mL), dried over anhydrous sodium sulfate and evaporated underreduced pressure. The residue was puiified by column chromatography (Redisep.-120 g, 0-15 % EtOAc/n.-I-Iexane) to obtain intermediate 41C (0.75 g, 10.00%). ?H NMR (400 MHz, DMSO d6) S ppm 2.65 (s. 3 1-1), 908 (s, 1 H). LCMS MethodL); retention time 0.92 mm, [M±2H1199.1.

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, 17321-97-0, 2-Amino-4-methylpyrimidine-5-carbonitrile.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; GUNAGA, Prashantha; BHIDE, Rajeev S.; BORA, Rajesh Onkardas; PANDA, Manoranjan; YADAV, Navnath Dnyanoba; PRIESTLEY, Eldon Scott; RICHTER, Jeremy; (321 pag.)WO2018/93569; (2018); A1;,
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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. 63234-80-0, name is 3-(2-Chloroethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one, the common compound, a new synthetic route is introduced below. HPLC of Formula: C11H15ClN2O

General procedure: A creamy white solid of 3-(2-chloroethyl)- 2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a] pyrimidin-4-one (5) (1.0eq) in N,N-dimethylformamide was taken, pottasium carbonate (3.0 eq) was added to the reaction mixture and then the appropriate aliphatic/ aromatic/heterocyclic amines (1.0 eq) were added and the reaction mixture was heated at 80 °C for 8h. The progress of the reaction was monitored by TLC. Upon completion, the solvent was removed by water wash and extracted with ethyl acetate. The organic layer was washed with 10percent ammonium chloride solution and finally water wash was given to organic layer and dried with anhydrous sodium sulphate. The solvent was evaporated to get crude product which was purified by column chromatography over silica gel (60-120mesh) using hexane: ethyl acetate(8:2) as an eluent.

The synthetic route of 63234-80-0 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Krishnamurthy, Byregowda; Vinaya, Kambappa; Rakshith, Devraj; Prasanna, Doddakunche Shivaramu; Rangappa, Kanchugarakoppal Subbegowda; Medicinal Chemistry; vol. 9; 2; (2013); p. 240 – 248;,
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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. 2380-63-4, name is 1H-Pyrazolo[3,4-d]pyrimidin-4-amine, molecular formula is C5H5N5, 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. Recommanded Product: 1H-Pyrazolo[3,4-d]pyrimidin-4-amine

To a stirred suspension of lH-pyrazolo-[3,4-(i]pyrimidin-4-ylamine (8-1 ; 50 g) in DMF (500 mL) N-bromosuccinimide (66 g) was added and the reaction mass was heated for 5 h at 70 C. The solvent was removed under reduced pressure. Water was added to the residue and stirred for 30 minutes. The reaction mass was filtered and the solid and washed with diethyl ether. The product was dried under reduced pressure overnight to obtain the title compound as a brown solid.

With the rapid development of chemical substances, we look forward to future research findings about 2380-63-4.

Reference:
Patent; SUN PHARMA ADVANCED RESEARCH COMPANY LIMITED; KADIYALA, V.S.N. Murty; RAUT, Virendra Narendra; SAVANT, Pratit; SHETH, Chetana Kaushal; CHAUDHARI, Umesh Vishnu; RATHOD, Rajendrasinh Jashvantsinh; BHATT, Tushar Bhupendrabhai; CHITTURI, Trinadha Rao; (50 pag.)WO2017/134685; (2017); A2;,
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Electric Literature of 18592-13-7, 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. 18592-13-7, name is 6-(Chloromethyl)pyrimidine-2,4(1H,3H)-dione. A new synthetic method of this compound is introduced below.

Intermediate 1 y)methyl)pyrimidine-2,4(lH,3H)-dione A mixture of 6-(chloromethyl)pyrimidine-2,4(lH,3H)-dione (1 g, 6.23 mmol), 2,2,2- trifluoroethanol (2.235 mL, 31.14 mmol) and cesium carbonate (6.09 g, 18.68 mmol) in dimethylformamide (10 mL) was heated in a microwave oven at 100C for 30 min. The mixture was filtered and the volatiles were removed in vacuum. The residue was treated with diluted HCI (pH 4.5) and cooled to 0C. The resulting crystalls were collected by fitration and dried in vacuum cabinet to yield the title compound, 0.92 g (66%). MS (APCI ) m/z 223 (M-H) XH NMR (500 MHz, DMSO-cf6) 0 ppm 4.18 (q, 2 H) 4.36 (s, 2 H) 5.49 (s, 1 H) 10.93 (br. s., 1 H) 11.03 (br. s., 1 H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,18592-13-7, its application will become more common.

Reference:
Patent; ACTURUM LIFE SCIENCE AB; BESIDSKI, Yevgeni; YNGVE, Ulrika; PAULSEN, Kim; LINDE, Christian; MACSARI, Istvan; MALMBORG, Jonas; PAPTCHIKHINE, Alexander; ARVIDSSON, Per; WO2014/195323; (2014); A1;,
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Related Products of 33034-67-2, 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. 33034-67-2, name is 2-Chloro-4-(trifluoromethyl)pyrimidine, molecular formula is C5H2ClF3N2, 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 mixture of 48 mg of potassium carbonate in methanol (3 ml) was added 37 mg of 4-(5- cyano-7-isopropyl-l ,3-benzoxazol-2-yl)-N-[(7S)-l ,4-oxazepan-7-ylmethyl]benzamide(INTERMEDIATE 20) followed by 2-chloro-4-(trifluoromethyl)pyrimidine (16 mg). The mixture was heated via microwave at 12O0C for 35 min, and then cooled and added directly to a 4OM samplet for purification via column chromatography on a Biotage Horizon 4OM column, eluting with 1 column volume of 100percent hexanes, followed by a gradient of 0 to 100percent ethyl acetate in hexanes over 10 column volumes, followed by 4 column volumes of 100percent ethyl acetate, to provide the title compound (37 mg, 76 percent). Mass spectrum (ESI) 565.2 (M+l). 1H NMR (500 MHz, CDCl3): delta 8.52 (s, IH), 8.35 (d, J=8.5 Hz, 2H), 7.96 (d, J=8.3 Hz, 2H), 7.95 (s, IH), 7.54 (s, IH), 6.81 (d, J=4.8 Hz, IH), 6.65 (bs, IH), 4.26 (m, 2H), 3.98 (m, 3H), 3.70 (s, 2H), 3.69 (m, 2H), 3.48 (sept, J=7.0 Hz, IH), 3.25 (m, IH), 2.19 (m, IH), 1.83 (m, IH), 1.48 (d, J=7.1 Hz, 6H).

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 33034-67-2, 2-Chloro-4-(trifluoromethyl)pyrimidine.

Reference:
Patent; MERCK & CO., INC.; WO2008/156715; (2008); A1;,
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Pyrimidine – Wikipedia

Reference of 3680-69-1, 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 3680-69-1, name is 4-Chloro-7H-pyrrolo[2,3-d]pyrimidine. This compound has unique chemical properties. The synthetic route is as follows.

Step 1. 4-Chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine (Compound 3) 4-Chloro-7H-pyrrolo[2,3-d]pyrimidine 10.75 g (70 mmol) (Toronto Research Chemicals, Inc) and N-iodosuccinimide (16.8 g, 75 mmol) were dissolved in 400 mL of dry DMF and left at ambient temperature in the darkness over night. The solvent was evaporated. The yellow residue was suspended in hot 10% solution of Na2SO3, filtered, washed twice with hot water and crystallized from ethanol to yield 14.6 g (74.6%) of the title compound as off-white crystals. The mother liquid was evaporated up to 1/3 volume and crystallized again from ethanol to give 2.47 g (12.3%) of the title product; Total yield is close to 100%; M.p. 212-214 (decomposition); UV lambdamax: 307, 266, 230, 227 nm (methanol); MS: 277.93 (M-H), 313 (M+Cl); 1H-NMR (DMSO-d6): 12.94 (s, 1H, NH), 8.58 (s, 1H, H-2), 7.94 (s, 1H, H-8).

According to the analysis of related databases, 3680-69-1, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Genelabs Technologies, Inc.; US2005/215510; (2005); A1;,
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Synthetic Route of 25940-35-6 ,Some common heterocyclic compound, 25940-35-6, molecular formula is C7H5N3O2, 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.

(Benzotriazol-1 -yloxy)tripyrrolidinophosphonium hexafluorophosphate (1 .05 g, 2.02 mmol) was added to a mixture of pyrazolo[1 ,5-a]pyrimidine-3-carboxylic acid (299 mg, 1 .84 mmol, GAS No. 25940-35-6), trans-4-am ino-N-(2-chloro-4-fluorophenyl)cyclohexanecarboxam idehydrochloride (620 mg, 2.02 mmol) and N-ethyl-N-isopropylpropan-2-amine (1.6 ml, 9.2 mmol) in 20 ml N,N-dimethylformamide and the mixture was stirred over night at room temperature. For work-up, the reaction mixuture was concentrated under reduced pressure and the residue was stirred with a mixture of water and methanol. The precipitate was collected by filtration, washed with water and methanol and dried to yield the title compound(525mg, 68% yield).LG-MS (Method 1): R = 1 .01 mm; MS (ESIpos) m/z = 416.3 [M+H].1HNMR (400 MHz, DMSO-d6): 6 [ppm] = 9.51 (5, 1H), 9.38-9.28 (m, 1H), 8.88-8.76 (m, 1H),8.58 (5, 1H), 7.85-7.75 (m, 1H), 7.66-7.57 (m, 1H), 7.54-7.43 (m, 1H), 7.32-7.18 (m, 2H),3.91-3.67 (m, 1H), 2.12-2.01 (m, 2H), 2.01-1.89 (m, 2H), 1.67-1.49 (m, 2H), 1.47-1.27 (m,2H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,25940-35-6, its application will become more common.

Reference:
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; EIS, Knut; ACKERMANN, Jens; WAGNER, Sarah; BUCHGRABER, Philipp; SUeLZLE, Detlev; HOLTON, Simon; BENDER, Eckhard; LI, Volkhart; LIU, Ningshu; SIEGEL, Franziska; LIENAU, Philip; BAIRLEIN, Michaela; VON NUSSBAUM, Franz; HERBERT,Simon; KOPPITZ, Marcus; (734 pag.)WO2016/177658; (2016); A1;,
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