Month: July 2021

Application of 149965-40-2, 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 149965-40-2, name is (5-Bromo-2-chlorophenyl)methanol. This compound has unique chemical properties. The synthetic route is as follows.

(2-Chloro-5-(4,4,5,5-tetramethyl-1 ,3,2-dioxaborolan-2-yl)phenyl)methanol A suspension of (5-bromo-2-chlorophenyl)methanol (2.08 g, 9.39 mmol), potassium acetate (3.50 g, 35.7 mmol) and 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1 ,3,2-dioxaborolane) (2.77 g, 10.89 mmol) degassed with a stream of nitrogen for ~10 mins after which time bis(triphenylphosphine)palladium(ll) chloride (0.396 g, 0.563 mmol) was added and the mixture was heated to 120 C for 30 minutes in a microwave at high power. After this time, the suspension was cooled and filtered through celite using ethyl acetate to wash the celite. The dark colored solution was washed with water (4x gently), brine (1x), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by flash chromatography to give the title compound (2.76g, 68.9%), LC-MS m/z 267.7 (M+H)+, 1 .0 minutes (ret time), 63 % purity.

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 149965-40-2, (5-Bromo-2-chlorophenyl)methanol.

Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; ASTEX THERAPEUTICS LIMITED; KERNS, Jeffrey K.; LI, Tindy; YAN, Hongxing; HEIGHTMAN, Thomas Daniel; WOOLFORD, Alison Jo-Anne; GRIFFITHS-JONES, Charlotte Mary; WILLEMS, Hendrika Maria Gerarda; (109 pag.)WO2016/203400; (2016); A1;,
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Related Products of 534-03-2, 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.534-03-2, name is 2-Aminopropane-1,3-diol, molecular formula is C3H9NO2, molecular weight is 91.1091, as common compound, the synthetic route is as follows.

Fmoc-beta-alanine (84.5 g, 271 mmol) and N-hydroxysuccinimide (31.2 g, 271 mmol) are dissolved in dichloromethane (850 mL) and DMF (43 mL) with magnetic stirring. N,N-dicyclohexylcarbodiimide (56.0 g, 271 mmol) dissolved in dichloromethane (100 mL) is added in one portion. After stirring 1.5 hours at room temperature, the reaction mixture was filtered, and transferred to a mixture of serinol (24.7 g, 271 mmol) in pyridine (380 mL) and allowed to react 16 hours overnight. The mixture is evaporated to a semi-solid residue, and co-evaporated 3*400 mL toluene to remove the remaining pyridine. The solid residue is refluxed in dichloromethane (3.0 L) and stored at -20 C. for 2 hours. The product was collect by filtration in a sintered glass funnel, and washed 2*1000 mL dichloromethane, and 1*1000 mL diethyl ether. Drying overnight under high vacuum yielded 92.8 g (89%) of 1.

The chemical industry reduces the impact on the environment during synthesis 534-03-2, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Nelson Biotechnologies, Inc.; Glen Research Corporation; US2011/77389; (2011); 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. 15258-73-8, name is (2,6-Dichlorophenyl)methanol, the common compound, a new synthetic route is introduced below. name: (2,6-Dichlorophenyl)methanol

To an ice cooled solution of (2, 6-dichloro-phenyl)-methanol (5 G, 28. 2 MMOL) in anhydrous tetrahydrofuran (200 mL) was added sodium hydride (1. 13 G, 28. 2 mmol, 60% disp.) slowly under nitrogen atmosphere. After stirring for 30 minutes, 3, 5-dibromo-pyrazin-2-ylamine (7. 08 g, 28. 2 MMOL) in anhydrous tetrahydrofuran (50 mL) was added via an addition funnel. Once the addition was complete the ice bath was removed and the reaction was REFLUXED under nitrogen and monitored by reversed phase HPLC. After 18 hr HPLC showed that the majority of the starting 3, 5-dibromo-pyrazin-2- ylamine had been consumed and the reaction was allowed to cool to room temperature. The reaction mixture was concentrated in vacuum until 50 mL remained. The mixture was diluted with ethyl acetate (200 mL) and extracted with 50% brine (2 X 200 ML). The organic layer was dried over anhydrous magnesium sulfate and concentrated in vacuum. The crude product was purified using a silica gel column ELUTING with 1 : 1 ETHYL ACETATE/DICHLOROMETHANE TO YIELD 5-BROMO-3- (2, 6-DICHLORO-BENZYLOXY)- PYRAZIN-2-YLAMINE as a white solid (8. 17 G, 83% yield).

The synthetic route of 15258-73-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SUGEN, INC.; WO2004/76412; (2004); A2;,
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Adding a certain compound to certain chemical reactions, such as: 5182-44-5, 2-(3-Chlorophenyl)ethanol, 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, 5182-44-5, blongs to alcohols-buliding-blocks compound. name: 2-(3-Chlorophenyl)ethanol

General procedure: 2.5mmol thiazole-4-carboxyli acid and 2.0mmol alcohol were dissolved in 25mL dichloromethane (DCM) in a dry flask with continuous stirring, followed by the addition of 2.5mmol 3-(3-dimethylaminopropyl) -1-ethylcarbodiimide hydrochloride. When the temperature of the reaction system cooled to 0C, 0.2mmol 4-dimethylaminopyridine was added dropwise and reacted for 1hat 0C. Then the temperature was elevated to room temperature for another 4h reaction. The reaction was stopped by adding 25mL saturated NaHCO3 solution and extracted twice with 20mL dichloromethane (2×20mL). The extracted organic layers were first dried by anhydrous Na2SO4, and then filtered and concentrated under vacuum distillation, obtaining the crude products. Finally, the crude products were further purified using column chromatography (ethy lacetate:petroleum ether, 1:5).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,5182-44-5, its application will become more common.

Reference:
Article; Li, Shengrong; Chen, Siyu; Fan, Jilin; Cao, Zhen; Ouyang, Weihao; Tong, Ning; Hu, Xin; Hu, Jie; Li, Peishan; Feng, Zifeng; Huang, Xi; Li, Yuying; Xie, Mingshan; He, Ruikun; Jian, Jingyi; Wu, Biyuan; Xu, Chen; Wu, Weijian; Guo, Jialiang; Lin, Jing; Sun, Pinghua; European Journal of Medicinal Chemistry; vol. 145; (2018); p. 64 – 73;,
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Related Products of 62058-03-1 , The common heterocyclic compound, 62058-03-1, name is trans-4-Aminoadamantan-1-ol, molecular formula is C10H17NO, 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.

General procedure: To a solution of ethyl 1-phenyl-5-(2-methyl-4-oxobutan-2-yl)-1H-pyrazole-4-carboxylate 14b (45 mg, 0.15 mmol) in CHCl3 (9 mL) was added trans-5-hydroxy-2-adamantylamine (25 mg, 0.15 mmol), acetic acid (0.025 mL, 0.45 mmol) and sodium triacetoxyborohydride (85 mg, 0.45 mmol) at room temperature. After stirring at ambient temperature for 16 hours, the reaction mixture was quenched with aq. NaHCO3, extracted with CHCl3, and washed with aq. NaCl. The combined organic layer was dried over Na2SO4 and concentrated in vacuo. The residue was dissolved in methanol (0.30 mL), and added 1.0 N NaOH (0.22 mL, 0.22 mmol) at room temperature. After stirring at ambient temperature for 16 hours, the solvent was removed under vacuum. The mixture of the residue in CHCl3 (1.5 mL) and DIPEA (0.078 mL, 0.45 mmol) and HBTU (35 mg, 0.15 mmol) was stirred at room temperature. After 16 hours, the reaction mixture was quenched with aq. NaHCO3, extracted with CHCl3, and washed with aq. NaCl., then purified with column chromatography (silica gel, eluting with CHCl3/methanol) to give the title compound as a white solid (0.025 g, 42 percent yield).

The synthetic route of 62058-03-1 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Udagawa, Shuji; Sakami, Satoshi; Takemura, Takahiro; Sato, Mikiya; Arai, Takahiro; Nitta, Aiko; Aoki, Takumi; Kawai, Koji; Iwamura, Tomokatsu; Okazaki, Seiji; Takahashi, Takehiro; Kaino, Mie; Bioorganic and Medicinal Chemistry Letters; vol. 23; 6; (2013); p. 1617 – 1621;,
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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. 2568-33-4, name is 3-Methylbutane-1,3-diol. This compound has unique chemical properties. The synthetic route is as follows. category: alcohols-buliding-blocks

(210a) 3-Hydroxy-3-methylbutanal Pyridinium chlorochromate (2.6 g, 12 mmol) and Celite (5 g) were sufficiently ground in a mortar and were suspended in methylene chloride (50 mL). To this mixture, a methylene chloride solution (10 mL) of 3-methyl-1,3-butanediol (1.1 g, 10 mmol) was added. The resulting mixture was stirred at room temperature for 3 hr and then filtered. The filtrate was concentrated under reduced pressure. The resulting crude product was purified by silica gel column chromatography (Biotage, eluding solvent; hexane: ethyl acetate = 2: 3) to obtain 0.47 g (yield: 45%) of the title compound as a colorless oily material. 1H-NMR (400 MHz, CDCl3) delta ppm: 9.85 (1H, t, J = 2.0 Hz), 2.63 (2H, d, J = 2.0 Hz), 1.34 (6H, s).

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, 2568-33-4, 3-Methylbutane-1,3-diol.

Reference:
Patent; Sankyo Company, Limited; EP1798229; (2007); A1;,
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Application of 2568-33-4, 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. 2568-33-4, name is 3-Methylbutane-1,3-diol, molecular formula is C5H12O2, 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 cooled solution of 53 (2.0 g, 19.20 mmol, 1.0eq) in dichioromethane (40 mE) was added pyridine (3.03 g,38.4 mmol, 2.0 eq) followed by mesyl chloride (2.29 g,20.16 mmol, 1.05 eq) dropwise at 0 C. The reaction mixturewas stirred at room temperature for 1 h. After completion ofreaction, reaction mixture was transferred into ice cold waterand product was extracted with dichloro methane. Organic layer was combined, dried over sodium sulphate and concentrated under reduced pressure to obtain 53.1. (1.5 g, 42.86%), MS(ES): mlz 183.06 [M+H].

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 2568-33-4, 3-Methylbutane-1,3-diol.

Reference:
Patent; Nimbus Lakshmi, Inc.; Masse, Craig E.; Greenwood, Jeremy Robert; Mondal, Sayan; Cowen, Scott D.; McLean, Thomas H.; (624 pag.)US2019/31664; (2019); A1;,
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Synthetic Route of 349-75-7, 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.349-75-7, name is (3-(Trifluoromethyl)phenyl)methanol, molecular formula is C8H7F3O, molecular weight is 176.14, as common compound, the synthetic route is as follows.

3-Trifluoromethylbenzyl alcohol (10 g, 56.8 mmol)And pyridine (6.74 g, 85.2 mmol)Was dissolved in 50 ml of DCM at -10 C,The triphosgene was dissolved in 50 ml of DCM,A solution of 3-trifluoromethylbenzyl alcohol and pyridine in DCM was added dropwise to a solution of triphosgene in DCM,The reaction was carried out at -10 C for 2 hours,Room temperature reaction for 42 hours,TLC monitoring,The reaction was terminated, the solvent was decompressed, extracted with EA,Washed three times with water,Combined organic layer,Concentrated in vacuo to give 12.7 g of a colorless oil,Yield 93.7%.

The chemical industry reduces the impact on the environment during synthesis 349-75-7, I believe this compound will play a more active role in future production and life.

Reference:
Patent; North Nationalities University; Hong Wei; Wang Hao; Yang Hao; Ouyang Yifan; Tan Xiaoli; Sun Yutong; Zhu Xuanli; Wang Zhe; (18 pag.)CN106749070; (2017); A;,
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Synthetic Route of 23147-58-2, 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 23147-58-2, name is Glycerol aldehyde dimer. This compound has unique chemical properties. The synthetic route is as follows.

Glycol aldehyde dimer (1.0 g) was dissolved in demineralized water (14.5 g) . The solution was loaded into an autoclave along with 5% Ru on carbon catalyst (Sigma Aldrich, 0.20 g). The autoclave was purged 3 times with hydrogen and subsequently pressurized with hydrogen to the respective pressures given in Table 2. The mixture was heated to 80C from room temperature in the course of 15 min and stirred for 3 hours. The autoclave was then cooled to room temperature and the decrease in hydrogen pressure was noted.The product mixture was isolated from the catalyst by filtration and analyzed by HPLC and GC.Results of Examples 9 to 11 are provided in Table 4. The amount of 1, 2-butanediol (1,2-BDO) present in relation to ethylene glycol is provided. It can be seen that an increase in pressure of the reaction results in a reduction of 1,2-butanediol (1,2-BDO) formed, resulting in an increased purity of the ethylene glycol product in milder conditions.Table 4.

According to the analysis of related databases, 23147-58-2, the application of this compound in the production field has become more and more popular.

Reference:
Patent; HALDOR TOPSØE A/S; HOLM, Martin Spangsberg; TAARNING, Esben; (22 pag.)WO2016/1169; (2016); A1;,
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Adding a certain compound to certain chemical reactions, such as: 4084-38-2, 2,3,5,6-Tetrafluorobenzyl alcohol, 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: C7H4F4O, blongs to alcohols-buliding-blocks compound. COA of Formula: C7H4F4O

Add in a 100mL three-necked flask2,3,5,6-tetrafluorobenzyl alcohol 4.5g (25mmol),Pyridine 3g,Hexane 40mL,Slow dropCis-2,2-dimethyl-3-(E/Z-2-chloropropenyl)cyclopropanecarboxylic acid chloride 6g (30mmol),The reaction was carried out for 4 hours at room temperature.The organic phase is sequentially treated with 20 mL of 5% sodium hydroxide solution.Wash with 5% hydrochloric acid solution and saturated sodium chloride solution, dry,After desolvation, a pale yellow viscous liquid is obtained.After column chromatography (petroleum ether / ethyl acetate = 20/1), 9.2 g of pale yellow liquid was obtained.The yield was 95%.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,4084-38-2, 2,3,5,6-Tetrafluorobenzyl alcohol, and friends who are interested can also refer to it.

Reference:
Patent; Mt. Huang College; Han Bingbing; Zheng Zubiao; (15 pag.)CN109776327; (2019); A;,
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