Bromides-buliding-blocks

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. 55289-36-6, name is 3-Bromo-2-methylaniline, A new synthetic method of this compound is introduced below., HPLC of Formula: C7H8BrN

[0249] (a) 4-Bromoindazole. A 350 mL 5-necked flask was charged with benzene (127 mL) and potassium acetate (4.24 g, 43.2 mmol). 3-Bromo-2- methyl-aniline (6.00 g, 42.4 mmol) was added over a period of 5 min to the white suspension followed by acetic anhydride (12.0 mL, 127 mmol). A thick white suspension was formed at this point. The mixture was heated to 80C and isopentyl nitrite (8.46 g, 43.2 mmol) was added and the orange suspension was heated at 80C overnight. The reaction mixture was cooled, filtered and the filter cake was washed with benzene (3×30 mL). The filtrate was concentrated under reduced pressure to remove the solvent and the residue was heated to 60C. Cone. HCl (2.0 mL) was added and the mixture was stirred at 7O0C for 1 h. More cone. HCl was added (2.0 mL) and the mixture was stirred at 70C for 3 h. The mixture was cooled, diluted with water and toluene until the solid was completely dissolved. The layers were separated and the aqueous layer was extracted with toluene (3×50 mL). The combined organics were concentrated until product began to crystallize. The suspension was cooled to 0C and the precipitated solid was filtered to provide 4-bromoindazole as a beige solid (4.45 g, 53%).

The synthetic route of 55289-36-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; LOCUS PHARMACEUTICALS, INC.; WO2008/8059; (2008); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Reference of 615-87-2, 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. 615-87-2, name is 1,5-Dibromo-2,4-dimethylbenzene, This compound has unique chemical properties. The synthetic route is as follows.

Into an eggplant type flask having a capacity of 200 milliliter, dbb in an amount of 5.11 mmol (1.35 g), (2-pyridyl)trimethyl tin in an amount of 15.3 mmol (3.71 g), Pd (PPh3)2Cl2 in an amount of 0.408 mmol (0.286 g), lithium chloride in an amount of 51.1 mmol (2.17 g) and toluene as a solvent in an amount of 20 milliliter were placed and the resultant solution was refluxed for 3 days. After the resultant solution was cooled by leaving it standing, saturated potassium fluoride aqueous solution was added and the resultant solution was stirred for 30 minutes. After filtering the resultant solution, dichloromethane and 5 % sodium hydrogen carbonate aqueous solution were added to the filtrate and the resultant solution was extracted. Adding sodium sulfate into an organic layer and dehydrating the resultant mixture, the organic layer was removed through pressure reduction, and the remained substance was refined by means of silica gel column chromatography (hexane : ether= 4:1). After re-crystallizing the resultant substance with the use of heated hexane, white crystals of dpyx in an amount of 0.31 g was obtained (yield: 33 %). m.p.: 89 to 90 C

The chemical industry reduces the impact on the environment during synthesis 1,5-Dibromo-2,4-dimethylbenzene. I believe this compound will play a more active role in future production and life.

Reference:
Patent; IDEMITSU KOSAN CO., LTD.; Chuo University; EP1816134; (2007); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Related Products of 698-19-1, These common heterocyclic compound, 698-19-1, name is 1-(2-Bromophenyl)-N-methylmethanamine, 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 compound 1A (1.0 g, 5 mmol) in 50 mL of DCM was added N-Boc-glycine (950 mg, 5.4 mmol), followed by [1-HYDROXY-7-AZABENZOTRIAZOLE] (800 mg, 5.84 mmol) and [1- (3-DIMETHYLAMINOPROPYL)-3-ETHYLCARBODIIMIDE] hydrochloride (4.41 g, 7.38 mmol). The reaction mixture was stirred at rt for 4 hours and concentrated under reduced pressure. The resulting oil was dissolved in EtOAc and washed successively with saturated sodium bicarbonate, 1N-hydrochloric acid, dried over sodium sulfate and concentrated under reduced pressure to give the title compound (1.8 g, 99%) as a colorless oil, which was used for the subsequent step without further purification

Statistics shows that 1-(2-Bromophenyl)-N-methylmethanamine is playing an increasingly important role. we look forward to future research findings about 698-19-1.

Reference:
Patent; Bristol-Myers Squibb Company; WO2004/214; (2003); A2;,
Bromide – Wikipedia,
bromide – Wiktionary

Synthetic Route of 51554-93-9,Some common heterocyclic compound, 51554-93-9, name is 1-Bromo-4-octylbenzene, molecular formula is C14H21Br, 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: A 3-neck round-bottomed flask equipped with a thermometer and a condenser was flame-dried and flushed with Ar. The flask was then charged with Mg0 (1.1 eq.), a single I2 crystal and another vacuum/Ar cycle was performed. Et2O (C=0.65M) was added resulting in a bright orange suspension of Mg0 pellets. Phenyl octyl bromide (1.0 eq.) was then added in one portion and the suspension was heated via a heatgun until the internal temperature reached 32C and stabilized for 5-10s, indicating that the Grignard formation had started. The reaction was stirred at rt until disappearance of the starting material by 1H NMR analysis (e.g.?1h). (0031) The Grignard solution (3.0 eq., C=0.65M) was then syringed to another flask containing substrate (1.0. eq.) in dry Et2O (C=0.05M). The solution was stirred at rt until disappearance of the starting material by TLC analysis. Saturated aqueous NH4Cl solution was added and the aqueous layer was extracted x2 with EtOAc. The organic layers were collected, washed x1 brine, dried over Na2SO4, filtered, concentrated in vacuo.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-Bromo-4-octylbenzene, its application will become more common.

Reference:
Article; Garsi, Jean-Baptiste; Sernissi, Lorenzo; Vece, Vito; Hanessian, Stephen; McCracken, Alison N.; Simitian, Grigor; Edinger, Aimee L.; European Journal of Medicinal Chemistry; vol. 159; (2018); p. 217 – 242;,
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Synthetic Route of 67344-77-8, 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. 67344-77-8, name is 1-(3-Bromophenyl)-N-methylmethanamine belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

To a mixture of 3-bromo-N-methylbenzylamine (12) (400 mg, 2 mmol), copper iodide (15.2 mg, 0.08 mmol) and dichlorobis(triphenylphosphine)palladium (II) (28 mg, 0.04 mmol) in DMF (3 mL) was added phenylacetylene (244.8 mg, 2.4 mmol) and triethylamine (556 uL, 4 mmol). The reaction vessel was flushed with argon, and the reaction mixture heated in the microwave for 5 minutes at 110¡ã C. The volatiles were removed in vacuo, ethyl acetate was added, and the organic solution washed successively with saturated NaHCO3 (.x.1), water (.x.1), brine (.x.1) and then extracted with 1N HCl. The acidic solution was basified to pH 9.0 with 1M NaOH, and then re-extracted with ethyl acetate, dried over magnesium sulfate and concentrated. Compound 13 was used without further purification. HPLC-MS tR=1.24 min (UV254 nm); mass calculated for formula C16H15N 221.1, observed LCMS m/z 222.1 (M+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, 1-(3-Bromophenyl)-N-methylmethanamine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Schering Corporation; US2007/129378; (2007); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Related Products of 74586-53-1, 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. 74586-53-1 name is 3-Bromo-5-methylaniline, This 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.

Step 1 : A solution of 3-bromo-5-methylaniline (162.5 g, 873.66 mmol) in 1,4- dioxane (2 L) was prepared, and 2-chloro-4-(trifluoromethyl)pyrimidine (182 g, 994.54 mmol) and methanesulfonic acid (97.5 g, 1.02 mol) were added sequentially. The resulting solution was heated to reflux overnight. The resulting mixture was cooled and concentrated in vacuo. The residue was diluted with 2 L of water, then adjusted to pH 7-8 with aqueous saturated sodium bicarbonate solution, followed by extraction with EtOAc (2×2 L). The organic layers were combined, washed with water (2x 2 L), dried over anhydrous sodium sulfate and concentrated in vacuo to afford N-(3-bromo-5-methylphenyl)-4-(trifluoromethyl)pyrimidin-2-amine as a light yellow solid. MS ESI calc’d for Ci2H10BrF3 3 [M + H]+ 332, 334, found 332, 334. NMR (400 MHz, CDCI3): delta 8.68 (d, J= 4.9 Hz, 1 H), 7.79 (s, 1 H), 7.33-7.23 (m, 2 H), 7.10-7.06 (m, 2 H), 2.36 (s, 3 H).

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

Reference:
Patent; MERCK SHARP & DOHME CORP.; MERCK CANADA INC.; HAIDLE, Andrew, M.; KNOWLES, Sandra Lee; KATTAR, Solomon, D.; DESCHENES, Denis; BURCH, Jason; ROBICHAUD, Joel; CHRISTOPHER, Matthew; ALTMAN, Michael, D.; JEWELL, James, P.; NORTHRUP, Alan, B.; BLOUIN, Marc; ELLIS, John, Michael; ZHOU, Hua; FISCHER, Christian; SCHELL, Adam, J.; REUTERSHAN, Michael, H.; TAOKA, Brandon, M.; DONOFRIO, Anthony; WO2013/192098; (2013); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Adding a certain compound to certain chemical reactions, such as: 5469-19-2, name is 1-Bromo-2,4,5-trimethylbenzene, belongs to bromides-buliding-blocks compound, 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 5469-19-2, COA of Formula: C9H11Br

Bromo-2,4,5-trimethyl-benzene (1) (2.64 g, 13.26 mmol), benezene- 1 ,4-diboronic acid (3) (1.00 g, 6.03 mmol) and a catalytic amount of tetrakis(triphenylphosphine)palladium(0) (0.10 g, 0.08 mmol) were added into a two-necked flask fitted with an Allihn condenser. The system was degassed and refilled with nitrogen three times. Then, 60 mL of distilled THF was injected, followed with an aqueous solution of potassium carbonate (0.15 g, 20 mL). After stifling at 85 C for 24 h, the mixture was extracted with DCM. The organic layer was collected and washed with deionized water and brine, and dried over anhydrous sodium sulfate. After filtration, the filtrate was evaporated under reduced pressure, and the crude product was purified by silica gel column chromatography using hexanelDCM (5/1, v/v) as eluent. A white powder of TPh-TM was obtained in 75.3% yield (1.42 g, 4.52 mmol).

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.

Reference:
Patent; THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY; TANG, Benzhong; ZHANG, Haoke; (64 pag.)WO2018/137558; (2018); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Synthetic Route of 6627-78-7, 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. 6627-78-7, name is 1-Bromo-4-methylnaphthalene belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

In a 100 ml three-necked flask, compound 4”’ (10 mmol, 2.48 g) and THF (50 ml) were added, and n-butyllithium (11 mmol, 1.6 M, 6.88 ml) was slowly added dropwise under nitrogen atmosphere at -78C. The reaction was carried out at -78C for 2 hours, and then 5 ml of a THF solution of triisopropyl borate (15 mmol, 3.03 g) was slowly added dropwise to the reaction system. After the addition was completed, the mixture was slowly warmed to room temperature and stirred overnight. After the disappearance of the TLC test material, the reaction was completed. reaction. The mixture was quenched with dilute hydrochloric acid (20%, 20 ml), stirred at room temperature for 3 hours, then extracted with ethyl acetate (50 ml*3), and the combined organic phases were washed with saturated brine (100 ml*3) and dried over anhydrous sodium sulfate. The organic phase was concentrated and purified by column chromatography to give compound 3”’ (7.8 mmol, 1.45 g, 78%).

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, 1-Bromo-4-methylnaphthalene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Jiangsu Ailikang Pharmaceutical Co., Ltd.; Chen Lei; Xing Xiaolan; Liu Yuxian; Lu Pingbo; (12 pag.)CN107814795; (2018); A;,
Bromide – Wikipedia,
bromide – Wiktionary

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. 703-91-3, name is 5-Bromo-2-(trifluoromethyl)aniline belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Quality Control of 5-Bromo-2-(trifluoromethyl)aniline

Pd(dppf)Cl2 (613 mg, 0.84 mmol) was added to a mixture of 5-bromo-2- (trifluoromethyl)aniline (Int 25a) (2.00 g, 8.37 mmol), cyclopropylboronic acid (929 mg, 12.56 mmol) and Na2CO3(1.77 g, 16.70 mmol) in dioxane (25 mL) and the mixture was stirred at 90 C overnight. The mixture was concentrated to dryness and the residue was purified by column chromatography (0-2% EtOAc in PE) to give the title compound as yellow oil.

The synthetic route of 703-91-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; PHENEX PHARMACEUTICALS AG; STEENECK, Christoph; DEUSCHLE, Ulrich; ALBERS, Michael; HOFFMANN, Thomas; (64 pag.)WO2018/141855; (2018); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Related Products of 34950-82-8, These common heterocyclic compound, 34950-82-8, name is 7-Bromo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine, 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 7-bromo-3, 4-dihydro-2H-pyrido [3, 2- b] [l,4]oxazine (549 mg, 2.55 mmol) in DMF(dry) (10 rtiL) was added 60% NaH in oil (123 mg, 3.06 mmol) at 0C. The mixture was stirred at 0C under N2 for 10 min. 1- ( chloromethyl ) -2- . . (methoxymethyl ) benzene (523 mg, 3.06 mmol) was added to the mixture at 0C. The mixture was stirred at room temperature under N2 overnight. The mixture was quenched with water at 0C and extracted with EtOAc. The organic layer was separated, washed with brine, dried over MgSO4 and concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with 5% – 50% EtOAc in hexane) to give the title (3288) compound (660 mg, 1.890 mmol, 74.0%) as white solids. (3289) MS (ESI+), found 349.1 (M+H) (3290) 1H NMR (300 MHz, CDC13) 5:3.28-3.33 (2H, m), 3.35 (3H, s) , (3291) 4.11-4.20 (2H, m) , 4.48 (2H, s) , 4.89 (2H,- s), 7.08 (1H, d, J = 2.3 Hz), 7.18-7.31 (3H, m) , 7.33-7.41 (1H, m) , 7.79 (1H, d, J = 1.9 Hz)

The synthetic route of 34950-82-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; YAMAMOTO, Satoshi; SHIRAI, Junya; KONO, Mitsunori; SHIOKAWA, Zenyu; YUKAWA, Tomoya; IMADA, Takashi; NEGORO, Nobuyuki; ODA, Tsuneo; SASAKI, Satoshi; NARA, Yoshi; SUZUKI, Shinkichi; SATO, Ayumu; ISHII, Naoki; SHIBUYA, Akito; NAKAGAWA, Yasuo; COLE, Derek; GIBSON, Tony; IVETAC, Anthony; SWANN, Steve; TYHONAS, John; (472 pag.)WO2018/30550; (2018); A1;,
Bromide – Wikipedia,
bromide – Wiktionary