Tag: M.W:100-200

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 6515-09-9, name is 2,3,6-Trichloropyridine. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C5H2Cl3N

A mixture of 2,3,6-trichloropyridine (18.2 g, 0.1 mol)Pd / C (10%) (2.73 g),1-isopropyl-4-methylcyclohexene (69 g, 0.5 mol) was added to methanol (182 g)Slowly heated to 60 C for 4 hours;After the reaction,The methanol was distilled off by distillation and vacuum distillation,Add water (100 g),The mixture of 2,3-dichloropyridine and water was distilled off by steam distillation at atmospheric pressure,Cooled by filtration to obtain 2,3-dichloropyridine 14g,Purity (HPLC) ?98%Yield 95%.

With the rapid development of chemical substances, we look forward to future research findings about 6515-09-9.

Reference:
Patent; Jiangsu Zhongbang Pharmaceutical Co., Ltd.; Qian, Yong; Xu, Qiang; Gao, Qian; Zhao, Huayang; Zhang, Xiaoqing; (5 pag.)CN106518754; (2017); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 886365-46-4, 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 886365-46-4, name is 5-Chloro-3-methylpyridine-2-carboxylic acid. This compound has unique chemical properties. The synthetic route is as follows.

Crude tert-butyl ((4aRS,11bRS)-10-amino-3,3,11b-trimethyl-4,4-dioxido-4-a,5,6,11b-tetrahydro-3H-benzo[6,7]oxepino[4,5-b][1,4]thiazin-2-yl)carbamate (70 mg, 0.165 mmol) was suspended in DMF (2 ml) and sonicated for 1 min. 5-Chloro-3-methylpyridine-2-carboxylic acid (34.0 mg, 0.198 mmol), pyridine (0.04 ml, 0.496 mmol) and HATU (94 mg, 0.248 mmol) were added and resulting suspension was stirred for 45 min at RT. The mixture was diluted with EtOAc (8 ml) and saturated NaHCO3 solution (3 ml). Water was added to dissolve precipitated solids. The organic layer was separated, washed with water and concentrated, and the resulting concentrate/residue was purified by FC on 12 g RediSep Gold column using 10-80% EtOAc in heptane to afford tert-butyl ((4aRS,11bRS)-10-(5-chloro-3-methylpicolinamido)-3,3,11b-trimethyl-4,4-dioxido-4-a,5,6,11b-tetrahydro-3H-benzo[6,7]oxepino[4,5-b][1,4]thiazin-2-yl)carbamate (76 mg, 0.132 mmol, 80% yield) as white solid.

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 886365-46-4, 5-Chloro-3-methylpyridine-2-carboxylic acid.

Reference:
Patent; WHITE, Ryan; ALLEN, Jennifer R.; EPSTEIN, Oleg; HONG, Fang-Tsao; HUA, Zihao; HUMAN, Jason Brooks; LOPEZ, Patricia; OLIVIERI, Philip R.; ROMERO, Karina; SCHENKEL, Laurie; STELLWAGEN, John; TAMAYO, Nuria A.; ZHENG, Xiao Mei; US2014/213581; (2014); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 51173-05-8, 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. 51173-05-8, name is 5-Fluoro-2-hydroxypyridine, molecular formula is C5H4FNO, 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.

Compound 4-80 was dissolved in sulfuric acid (the larger amounts indicated above) at rt and then heated to 65 C. A preformed solution of fuming nitric acid and sulfuric acid (the smaller amount indicated above) was added dropwise. The temperature was kept between 65 C. and 80 C. (rxn is exothermic and although the bath is at 65 C., temperature goes higher, usually 75, sometimes 80 C.). After the addition was complete, the reaction mixture was heated at 65 C. for an additional hr. The reaction mixture was then cooled to rt and poured in a flask containing ice) (20 g of ice/gr compound, evolution of gas occurred). A solid precipitated out and it was collected by filtration (1HNM showed 4-80 and something else (discarded)). The aqueous layer was extracted with AcOEt several times (3-5) and concentrated on a rotary evaporator under vacuum to afford a solid that was triturated with ether to afford 5-80 as a bright yellow solid. A total of 117 g of desired product was collected in the first crop (27% yield from diazonium salt). A portion did not crystallize: this oil was triturated with MeOH and Et2O to afford 3.6 g of 5-80; another precipitation from the mother liquid afforded an additional 6.23 g of the desired product 5-80. Total: 117.0+3.6+6.23=126.83. 30.4%). Yield for 3 steps (decomposition of diazonium salt; deprotection and nitration). Analytical data from Notebook: 53877-115: 1HNMR(delta, MeOD): 8.56-8.27 (dd, J=7.5, 3.3 Hz, 1H), 8.01 (d, J=3.3 Hz, 1H); LC/MS(M+1)+=158.9; rt=0.15 min. Note: A portion of the aqueous acidic solution was taken and neutralized with Na2CO3 until effervescence stopped and then it was extracted with AcOEt A different product was obtained. No desired product in these extracts.

According to the analysis of related databases, 51173-05-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Ueda, Yasutsugu; Connolly, Timothy P.; Kadow, John F.; Meanwell, Nicholas A.; Wang, Tao; Chen, Chung-Pin H.; Yeung, Kap-Sun; Zhang, Zhongxing; Leahy, David Kenneth; Pack, Shawn K.; Soundararajan, Nachimuthu; Sirard, Pierre; Levesque, Kathia; Thoraval, Dominique; US2005/209246; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 13958-85-5, 3-Fluoro-5-methylpyridin-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, COA of Formula: C6H7FN2, blongs to pyridine-derivatives compound. COA of Formula: C6H7FN2

General procedure: Pd2dba3 (8.25 mg, 9.01 pmol), XantPhos (13.0 mg, 22.5 pmol) and Cs2C03 (110 mg, 0.34 mmol) were dissolved in DMF (2.25 mL) in a sealed tube while N2 was bubbling. 1-49 (42.0 mg, 0.25 mmol) and 1-1 (53.5 mg. 0.23 mmol) were added and the reaction mixture was stirred at room temperature for 10 min. Then, the reaction mixture was heated at 110 C for 20 h. The reaction mixture was cooled to room temperature, filtered through Celite and washed with EtOAc. The solvent was removed under reduced pressure and the crude mixture was purified by reverse phase column chromatography (mobile phase: HCOOH (0.l%)/(MeCN:MeOH, 1 :1), gradient from 95:5 to 63:37) to afford compound 91 (42 mg, 50%) as a white solid.

The synthetic route of 13958-85-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; BARTOLOME-NEBREDA, Jose Manuel; TRABANCO-SUAREZ, Andres, Avelino; LEENAERTS, Joseph, Elisabeth; OEHLRICH, Daniel; BUIJNSTERS, Peter Jacobus Johannes Antonius; MARTINEZ LAMENCA, Carolina; VELTER, Adriana, Ingrid; VAN ROOSBROECK, Yves, Emiel, Maria; (110 pag.)WO2019/243533; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 55052-27-2 , The common heterocyclic compound, 55052-27-2, name is 6-Chloro-1H-pyrrolo[2,3-b]pyridine, molecular formula is C7H5ClN2, 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 6-chloro-1 H-pyrrolo[2,3-b]pyridine (1.37 g, 8.97 mmol) in DMF (1 00 ml),sodium hydride (60% in paraffin, 1 g, 41 mmol) was added. The solution was stirred for30 min being allowed to warm up from 0 oc to rt. Subsequently, benzenesulfonic acidchloride (1.5 ml, 11.8 mmol) was added dropwise. The suspension was stirred 3 h atroom temperature and hydrolyzed with ice water. The resulting solid was filtered off under25 reduced pressure, washed thoroughly with water (75 ml) and finally with petroleum ether(15 ml). The resulting material was dried at 60 oc and purified by column chromatography (eluent: pure dichloromethane) yielding 856 mg of 1-(benzenesulfonyl)-6-chloropyrrolo[2,3-b]pyridine Xll-20a as a brownish solid.Yield: 32%

The synthetic route of 55052-27-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; UCB PHARMA GMBH; MUELLER, Christa E.; PEGURIER, Cecile; DELIGNY, Michael Louis Robert; EL-TAYEB, Ali; HOCKEMEYER, Joerg; LEDECQ, Marie; MERCIER, Joel; PROVINS, Laurent; BOSHTA, Nader M.; BHATTARAI, Sanjay; NAMASIVAYAM, Vigneshwaran; FUNKE, Mario; SCHWACH, Lukas; GOLLOS, Sabrina; VON LAUFENBERG, Daniel; BARRE, Anais; (493 pag.)WO2018/122232; (2018); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 709652-82-4, name is 2-Amino-5-bromonicotinonitrile. A new synthetic method of this compound is introduced below., Recommanded Product: 2-Amino-5-bromonicotinonitrile

Step 2: Preparation of 5-bromo-2-(2,5-dimethyl-1H-pyrrol-1-yl) nicotinonitrile (44) To a suspension solution of the intermediate 42 (90.0 g, 0.45 mol, 1.0 eq) in toluene (1.5 L) was added the compound 43 (78.2 g, 0.68 mol, 1.5 eq) and 4-methylbenzenesulfonic acid (2.5 g, 0.01 mol, 0.03 eq). The mixture was heated to 110 C. and stirred for 17 hours to remove water by Dean Stark trap. The mixture was cooled to room temperature, removed of toluene (about 1 L), and then added with EtOAc (2 L) and water (1 L). The mixture was filtered; the aqueous layer was extracted with EtOAc (2 L); the organic phase was washed with brine (3 L) and concentrated to give the crude product, which was purified by flash chromatography (EtOAc:Hexane=1:1) to give the intermediate 44 (110.0 g, 0.39 mol, 87.1%). 1H NMR (400 MHz, DMSO-d6) delta 9.07-9.06 (d, J=2.4 Hz, 1H), 8.96-8.95 (d, J=2.4 Hz, 1H), 5.88 (s, 2H), 2.01 (s, 6H).

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, 709652-82-4, 2-Amino-5-bromonicotinonitrile.

Reference:
Patent; GREEN CROSS CORPORATION; CHOI, Soongyu; PARK, Eun-Jung; SEO, Hee Jeong; KONG, Younggyu; SON, Ickhwan; MA, Sang-ho; CHA, Man-Young; KIM, Mi-Soon; PARK, Kisoo; (143 pag.)US2016/311772; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 89488-30-2, 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.89488-30-2, name is 5-Bromo-3-methylpyridin-2(1H)-one, molecular formula is C6H6BrNO, molecular weight is 188.0219, as common compound, the synthetic route is as follows.

(0592) To a solution of 5-bromo-2-hydroxy-3-methyl pyridine (376 mg, 2.00 mmol) in toluene (15 mL) were added Ag2C03 (827 mg, 3.00 mmol) and benzyl bromide ( 13 mg, 3.00 mmol), and the mixture was stirred at 40 C for 2 h. The insoluble material was filtered, and the filtrate was concentrated in vacuo. The residue was purified by silica gel column (eluent: dichloromethane/ methanol, 0-20%) to yield light yellow solid (436 mg, 78%). 1H NMR (400 MHz, chloroform-c ) delta 8.08 – 8.02 (m, 1H), 7.51 (m, 1H), 7.49 – 7.41 (m, 2H), 7.43- 7.28 (m, 3H), 5.38 (s, 2H), 2.22 (s, 3H).

Statistics shows that 89488-30-2 is playing an increasingly important role. we look forward to future research findings about 5-Bromo-3-methylpyridin-2(1H)-one.

Reference:
Patent; THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE; YIN, Hang Hubert; ZHANG, Shuting; HU, Zhenyi; (114 pag.)WO2019/89648; (2019); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 58539-65-4 ,Some common heterocyclic compound, 58539-65-4, molecular formula is C7H8N2O, 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.

30) 2-methyl-nicotinonitrileCyanuric acid (418 mg, 2.2 mmol) was added in one portion to a suspension of 2-methylnicotinamide (intermediate 29) (613 mg, 4.5 mmol) in 2.5 ml of DMF cooled in ice. The 0 reaction was stirred for 2.5 hours then poured into ice. The reaction was extracted with ethyl acetate until the organic layer no longer contained product. The combined organic layers, were dried over Na2SO4, filtered and concentrated. Purified on normal phase chromatography with ethyl acetate/heptane 0 to 50 gradient then 50/50 EA/heptane. Yield (216 mg, 41 %). IH NMR (400 MHz, CHLOROFORM-D) delta ppm 2.78 (s, 3 H), 7.25 (dd, s J=7.71, 4.98 Hz, 1 H), 7.89 (dd, J=7.81, 1.56 Hz5 1 H), 8.68 (s, 1 H)

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. 58539-65-4, 2-Methylnicotinamide, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ASTRAZENECA AB; WO2007/73303; (2007); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 76006-11-6, Adding some certain compound to certain chemical reactions, such as: 76006-11-6, name is 7-Chloro-1H-pyrazolo[3,4-c]pyridine,molecular formula is C6H4ClN3, 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 76006-11-6.

To a solution of 7-chloro-1H-pyrazolo[3,4-c]pyridine (1032 mg, 6.720 mmol) in DMF (18 mL) was added N-iodosuccinimide (2.32 g, 10.3 mmol). The reaction mixture was heated to 80 oC for 1 h. The mixture was then diluted with EtOAc, washed with 1 M NaHSO3 (aq), 1 M Na2CO3 (aq) and brine. The organic layer was dried over anhydrous Na2SO4, filtered and concentrated. The residue was triturated with 10% CH2Cl2 in hexanes to give the desired product as a pale yellow solid (1.69 g, 90%). LCMS calculated for C6H4ClIN3 (M+H)+: m/z = 279.9; found 279.9.

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. 76006-11-6, 7-Chloro-1H-pyrazolo[3,4-c]pyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; INCYTE CORPORATION; PAN, Jun; WANG, Xiaozhao; BARBOSA, Joseph; YAO, Wenqing; YE, Yingda; (158 pag.)WO2017/30938; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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 76006-11-6, name is 7-Chloro-1H-pyrazolo[3,4-c]pyridine. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C6H4ClN3

Trimethylaluminum (23.9 mL, 47.8 mmol, 2M sol. in toluene) was added to a vigorously stirred solution of 7-chloro-1H-pyrazolo[3,4-c]pyridine (3.67 g, 23.9 mmol) and Pd(PPh3)4 (1.38 g, 1.19 mmol) in THF (109 mL) under argon. The reaction mixture was stirred at 65C for 16 h, cooled to RT and poured into sat. aq. NH4CI. The resulting suspension was filtered, the solid washed with water and discarded. The filtrate and the combined washings were extracted with EtOAc (3x). The combined organic extracts were washed with brine then dried (phase separator) and concentrated to give 7-methyl-i H-pyrazolo[3,4-c]pyridine as a solid. MS (LC/MS): 134 [M+H]+, tR (H PLC conditions d): 0.25 mm.

With the rapid development of chemical substances, we look forward to future research findings about 76006-11-6.

Reference:
Patent; NOVARTIS AG; ALTMANN, Eva; HOMMEL, Ulrich; LORTHIOIS, Edwige Liliane Jeanne; MAIBAUM, Juergen Klaus; OSTERMANN, Nils; QUANCARD, Jean; RANDL, Stefan Andreas; VULPETTI, Anna; FLOHR, Stefanie; WO2014/2058; (2014); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem