Author: Jessica.F

Reference of 41825-73-4, 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. 41825-73-4, name is 2-Bromo-4,6-dimethylaniline belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: Preparation of catalyst: 10mL flask was charged with a stirrer, Pd(OAc)2 (0.02mmol, 2mol%), ligand (Sym-Phos, PPh3, PhPCy2, S-Phos) (0.04mmol, 4mol%) and 1mL of THF. The flask was evacuated, backfilled with argon, and the reaction mixture was stirred for 10min at ambient temperature. Such prepared catalyst was used in the coupling reactions. Similarly were prepared catalysts based on PdCl2 complexes. Reaction setup. A round-bottom flask containing magnetic stir bar was charged with 15mL of 0.3% aqueous solution of SDS and base (3mmol). Then aryl halide (1mmol) dissolved in a minimum amount of THF, arylboronic acid or its derivative (1.5mmol) and the pre-catalyst (see above) were added. The flask was placed in to the oil bath (kept at 60C) and reaction mixture was stirred for next 16h. The product was filtered or extracted with methylene chloride or (3¡Á10mL), then combined organic layer was dried over MgSO4, filtered, solvent was evaporated and the product was isolated by column chromatography. Yields: 63-99%.

The synthetic route of 2-Bromo-4,6-dimethylaniline has been constantly updated, and we look forward to future research findings.

Reference:
Article; Demchuk, Oleg M.; Kap?on, Katarzyna; Mazur, Liliana; Strzelecka, Dorota; Pietrusiewicz, K. Micha?; Tetrahedron; vol. 72; 42; (2016); p. 6668 – 6677;,
Bromide – Wikipedia,
bromide – Wiktionary

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. 5279-32-3, name is 5,6-Dibromobenzo[d][1,3]dioxole, A new synthetic method of this compound is introduced below., Safety of 5,6-Dibromobenzo[d][1,3]dioxole

A stirred solution of 5,6-dibromobenzo[d][1,3]dioxole S6 (400 mg, 1.43 mmol) in toluene (15 mL) was cooled at -78 C, and freshly distilled furan (0.51 mL, 7.15 mmol) was added to the solution. n-BuLi (1.38 M in THF, 1.14 mL, 1.57 mmol) was added dropwise to the resulting solution over 5 minutes at -78 C. The reaction mixture was stirred for 10 additional minutes before it was warmed up to -40 C. Stirringwas continued for another 2 hours before water (20 mL) was added to quench the reaction. The organic layerwas separated and the aqueous layer was extracted with Et2O (4 x 10 mL). The combined organic extracts were washed with brine (20 mL), dried over Na2SO4, and concentrated in vacuo. Purification by column chromatography on silica gel, eluting with PET/Et2O (80:20), afforded 5,8-dihydro-5,8-epoxynaphtho[2,3-d][1,3]dioxole S7 (241 mg, 1.28 mmol, 90 %) as a white crystalline solid.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Article; Antien, Kevin; Viault, Guillaume; Pouysegu, Laurent; Peixoto, Philippe A.; Quideau, Stephane; Tetrahedron; vol. 73; 26; (2017); p. 3684 – 3690;,
Bromide – Wikipedia,
bromide – Wiktionary

Electric Literature of 1435-54-7, 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. 1435-54-7, name is 1,3-Dibromo-2-fluorobenzene belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Step 2: 2-(3,5-dibromo-4-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane To a solution of 1,3-dibromo-2-fluorobenzene (1.43 g, 5.63 mmol) in n-heptane (100 mL) was added Pin2B2 (953 mg, 3.75 mmol), cycloocta-1,5-diene iridium salt (63 mg, 0.094 mmol) and 2,6-diisopropyl-N-(pyridin-2-ylmethylene)aniline (37 mg, 0.14 mmol). The mixture was refluxed for 4 h under N2, cooled to rt, quenched with water, extracted with EA (3*50 mL). The combined organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography eluted with PE: EA=80:1 to give 2-(3,5-dibromo-4-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.046 g, yield 49%) as solid.

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-Dibromo-2-fluorobenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Anacor Pharmaceuticals, Inc.; Eli Lilly and Company; Akama, Tsutomu; Balko, Terry William; Defauw, Jean Marie; Plattner, Jacob J.; White, William Hunter; Winkle, Joseph Raymond; Zhang, Yong-Kang; Zhou, Yasheen; US2013/131016; (2013); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

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. 627526-90-3, name is 1-Bromo-3-(difluoromethyl)-5-fluorobenzene, A new synthetic method of this compound is introduced below., Computed Properties of C7H4BrF3

To a solution of magnesium (165 mg, 6.81 mmol) and lithium chloride (144 mg, 3.40 mmol) in THF (6.0 mL) was added DIBAL-H (27.2 muL, 0.027 mmol). After 5 minutes at room temperature, the reaction mixture was cooled to 0 C, and 1-bromo-3-(difluoromethyl)-5- fluorobenzene (612 mg, 2.72 mmol) was added at 0 C. The resulting mixture was stirred at 0 C for 1 hour, and then the mixture was added to a solution of (2S,3S,4R,5R)-5-(4-chloro-7H- pyrrolo[2,3-d]pyrimidin-7-yl)-2-(methoxy(methyl)carbamoyl)-3-methyltetrahydrofuran-3,4-diyl diacetate (200 mg, 0.454 mmol) in THF (3.0 mL) at 0 C. The resulting mixture was stirred for 10 minutes at 0 C. The reaction was quenched with acetic acid (390 muL, 6.81 mmol), and the resulting mixture was concentrated under reduced pressure. The residue was dissolved in ethyl acetate and then washed with 1 N citric acid. The organic layer was dried over Na2SO4, and the organic solvent was removed under reduced pressure. The crude material was then purified by flash column chromatography (EtOAc/EtOH (3:1) in hexanes, 5 to 100%) to yield (2S,3S,4R,5R)-5-(4-chloro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-2-(3-(difluoromethyl)-5- fluorobenzoyl)-3-methyltetrahydrofuran-3,4-diyl diacetate as a solid. MS: 526 [M+H]+.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; MERCK SHARP & DOHME CORP.; MACHACEK, Michelle; WITTER, David; HUANG, Chunhui; KAWAMURA, Shuhei; SCHNEIDER, Sebastian; WAN, Murray; (117 pag.)WO2020/33285; (2020); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Some common heterocyclic compound, 6698-13-1, name is 4-Bromo-1,3-benzodioxole, molecular formula is C7H5BrO2, 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. HPLC of Formula: C7H5BrO2

General procedure: An oven dried pressure tube was charged with aryl halide (0.5mmol), CuI (10-25mol%), anhydrous Zn(OAc)2 (1.5-2equiv) and anhydrous DMSO (1.6mL). The tube was sealed with a Teflon screw cap and stirred at 135C for 24-36h. The reaction mixture was then cooled to room temperature and stirred in 10mL of diethyl ether for 5min. It is filtered through a sintered funnel and the filtrate is washed with excess ice cold water and further extracted with diethyl ether (3¡Á10mL). The combined organic extracts were dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by column chromatography using 200-400 mesh silica gel and a mixture of diethyl ether and hexane (or pentane, for Table 2, entries 2, 8, 10, 14, 16 and 24) as eluents to afford the desired products in good yields.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 6698-13-1, its application will become more common.

Reference:
Article; Joseph, P.J. Amal; Priyadarshini; Kantam, M. Lakshmi; Sreedhar; Tetrahedron; vol. 69; 38; (2013); p. 8276 – 8283;,
Bromide – Wikipedia,
bromide – Wiktionary

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. 627463-18-7, name is 4-Bromo-1-ethyl-2-fluorobenzene, A new synthetic method of this compound is introduced below., COA of Formula: C8H8BrF

To a stirred solution of 4-bromo-1-ethyl-2-fluoro-benzene (1.80 g, 8.86 mmol) in N,N-dimethylformamide (20 mL), under a nitrogen atmosphere was added PdCl2(PPh3)2, CuI, and LiCl. The mixture was stirred at 60 C. for 3 hours, then poured into water and extracted with ether (3*20 mL). The extract was dried (Na2SO4) and concentrated. The residue was filtered through a pad of silica gel eluding with hexanes. Removal of solvent gave the crude, 1.67 g, which was used for the next step.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Chu, Xin-Jie; Ding, Qingjie; Jiang, Nan; Kim, Kyungjin; Lovey, Allen John; McComas, Warren William; Mullin JR., John Guilfoyle; Tilley, Jefferson Wright; US2004/6058; (2004); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

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. 1083181-43-4, name is 6-Bromo-1-methyl-1H-benzo[d][1,2,3]triazole, This compound has unique chemical properties. The synthetic route is as follows., Formula: C7H6BrN3

The title compound is prepared according to General Procedure 8 described for Intermediate 14, using 6-bromo-1-methyl-1 H-1 ,2,3-benzotriazole (Intermediate 80, 45 mg; 0.21 mmol; 1 eq.), bis(pinacolato)diboron (108 mg; 0.42 mmol; 2 eq.), potassium acetate (125 mg; 1.27 mmol; 6 eq.), Pd(dppf)CI2 (27 mg; 0.03 mmol; 0.15 eq.) in DMSO (2 mL). Conditions: 90 C overnight. The crude 1-methyl-6-(tetramethyl-1 ,3,2-dioxaborolan-2-yl)-1 – – 1 ,2,3-benzotriazole (80 mg; 0.10 mmol; 45%; brown solid; UPLC purity: 85%) is used in the next step without further purification.

According to the analysis of related databases, 1083181-43-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SELVITA S.A.; FABRITIUS, Charles-Henry Robert Yves; NOWAK, Mateusz Oktawian; WIKLIK, Katarzyna Anna; SABINIARZ, Aleksandra Barbara; BIE?, Marcin Dominik; BUDA, Anna Malgorzata; GUZIK, Pawel Szczepan; BIA?AS, Arkadiusz Kacper; PAWLIK, Henryk Edward; BOUTARD, Nicolas Felix Pierre; (439 pag.)WO2016/180537; (2016); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Synthetic Route of 945244-29-1, A common heterocyclic compound, 945244-29-1, name is 5-Bromo-2-fluoro-4-methylaniline, molecular formula is C7H7BrFN, 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.

Combine 5-bromo-2-fluoro-4-methylaniline (3.1 g, 15.2 mmol), bis(pinacolato)diboron (4.24 g, 16.7 mmol), and potassium acetate (4.47 g, 45.6 mmol) in dioxane (40 mL) and sparge with argon. Add [l,l’-bis(diphenylphosphino)ferrocene]- dichloropalladium(II)-dichloromethane complex (0.620 g, 0.760 mmol), sparge again with argon and heat at 100C overnight. Filter the reaction mixture and concentrate in vacuo. Purify by silica gel chromatography (EtOAc/hexanes) to give the title compound (3.24 g, 85%). MS (m/z): 252.1 (M+ H+).

The synthetic route of 945244-29-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; DECIPHERA PHARMACEUTICALS, LLC; ELI LILLY AND COMPANY; FLYNN, Daniel L.; KAUFMAN, Michael D.; VOGETI, Lakshminarayana; WISE, Scott C.; LU, Wei-Ping; SMITH, Bryan D.; CALDWELL, Timothy M.; PATT, William C.; HENRY, James Robert; HIPSKIND, Philip Arthur; PENG, Sheng-Bin; WO2013/134298; (2013); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

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. 21865-50-9, name is 6-Bromo-2,3,4,9-tetrahydro-1H-carbazole, A new synthetic method of this compound is introduced below., HPLC of Formula: C12H12BrN

To a solution of 6-bromo-2,3,4,9-tetrahydro-lH-carbazole (150 mg, 0.61 mmol) inDMF (5 ml) was added NaH (60% in mineral oil, 37 mg, 0.92 mmol) and tetrabutylammonium iodide (340 mg, 0.92 mmol). The resulting mixture was stirred at room temperature for 10 min and followed by addition of l-(3-chloropropoxy)-3,5- dimethylbenzene (121 mg, 0.61 mmol). The reaction mixture was stirred at room temperature overnight, poured into H2O (30 ml), and extracted with EtOAc (3 x 30 ml). The organic layers were combined, dried over MgSO4, filtered and cone, in vacuo. The crude product was purified by silica gel flash chromatography (EtOAc/hexane, 0-20%) to give the title compound (colorless oil, 182 mg). The yield: 72.4%.

The synthetic route of 21865-50-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ITHERX PHARMACEUTICALS, INC.; WO2009/103022; (2009); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Adding a certain compound to certain chemical reactions, such as: 51776-71-7, name is 1-Bromo-4-(difluoromethyl)benzene, 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 51776-71-7, Quality Control of 1-Bromo-4-(difluoromethyl)benzene

(1) A solution of 1-bromo-4-(difluoromethyl)benzene (5.00 g, 24.1 mmol) in THF (75 mL) was cooled to -78 C. while stirring, and a solution of n-butylithium in n-hexane (1.57 M, 16.9 mL, 26.6 mmol) was added dropwise and the resultant mixture was stirred for 30 minutes. After adding DMF (4.09 mL, 53.1 mmol) and elevating the temperature to 0 C. over 1 hour, the resultant solution was stirred for 14 hours while gradually returning the temperature to room temperature. The reaction solution was neutralized by adding an ammonium chloride aqueous solution and extraction was performed with diethyl ether twice. Organic fractions were combined and washed with a saturated salt solution and dried over magnesium sulfate. The solvent was removed by distillation under reduced pressure and the resultant residue was purified by column chromatography to obtain 4-(difluoromethyl)benzaldehyde (2.49 g, 66%). 1H-NMR (CDCl3) delta: 10.08 (1H, s), 7.99 (2H, d, J=8.3 Hz), 7.70 (2H, d, J=8.3 Hz), 6.72 (1H, t, J=55.9 Hz).

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; Teijin Pharma Limited; HOSODA, Shinnosuke; UNOKI, Gen; WATANABE, Hidekazu; SASAKI, Kosuke; SHIBATA, Jun; YOKOYAMA, Emi; HORIE, Kyohei; TAKAGI, Kenichiro; (202 pag.)US2019/31628; (2019); A1;,
Bromide – Wikipedia,
bromide – Wiktionary