Category: 38573-88-5

Adding a certain compound to certain chemical reactions, such as: 38573-88-5, name is 1-Bromo-2,3-difluorobenzene, 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 38573-88-5, Computed Properties of C6H3BrF2

EXAMPLE 52 6-(2,3-Difluorophenyl)-1,2-dihydro-2,2,4-trimethylquinoline (Compound 152, structure 4 of Scheme II, where R1 =2,3-difluorophenyl) This compound was prepared according to General Method 2 (EXAMPLE 9) from Compound 9 (28.7 mg, 0.09 mmol) and 1-bromo-2,3-difluorobenzene (10 muL, 0.09 mmol, Aldrich). The crude product was isolated and purified by silica gel chromatography (75 mL silica, 5percent ethyl acetate/hexane) to afford 16 mg (62percent) of Compound 152. Data for Compound 152: 1 H NMR (400 MHz, acetone-d6) 7.21 (m, 5H); 6.57 (d, J=8.3, 1 H); 5.37 (s, 1H); 1.99 (s, 3H); 1.28 (s, 6H).

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-2,3-difluorobenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Ligand Pharmaceuticals Incorporated; US5696130; (1997); A;,
Bromide – Wikipedia,
bromide – Wiktionary

Reference of 38573-88-5, 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. 38573-88-5 name is 1-Bromo-2,3-difluorobenzene, 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.

Example 48 2-Trifluoroacetamido-3-phenyl-6-(2,3-difluorobenzoyl)-imidazo[1,2-a]pyridine To a solution of 2,3-difluorobromobenzene (471 ml, 4.206 mmol) in dry THF (20 mL) was added a solution of n-butyl lithium (1.6M in hexanes, 2.63 mL) at -78¡ã C. The resulting yellow solution was stirred at the same temperature for 70 minutes, then a solution of 2-trifluoroacetamido-3-phenyl-6-(N-methyl-N-methoxycarbamoyl)imidazo[1,2-a]pyridine (0.500 g, 1.28 mmol) in dry THF (20 mL), was added dropwise via a cannula. The red-orange solution was allowed to warm over 60 minutes. Saturated NH4Cl was added and the mixture was stirred for 25 minutes before extracting with EtOAc. The organic layer was washed with brine, dried (Na2SO4), concentrated in vacuo and purified by column chromatography (CH2Cl2/CH3CN 4/1) to give 390 mg of an orange solid. (69percent). MS(FAB), NMR.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1-Bromo-2,3-difluorobenzene, and friends who are interested can also refer to it.

Reference:
Patent; Eli Lilly and Company; US6358971; (2002); B1;,
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. 38573-88-5, name is 1-Bromo-2,3-difluorobenzene, This compound has unique chemical properties. The synthetic route is as follows., HPLC of Formula: C6H3BrF2

General procedure: To 2 mL of 1,4-dioxane in microwave reaction vessel were added bromobenzene (0.20 g, 1.27 mmol), bis(pinacolato)diboron (0.36 g, 1.40 mmol), potassium acetate (0.38 g, 3.8 mmol), and PdCl2(dppf) (0.028 g, 0.038 mmol). The reaction mixture was heated to 110 ¡ãC by microwave irradiation at power 100 W for 10 min. After solvent was removed under reduced pressure, the residue was purified by dry column vacuum chromatography (DCVC) using dichloromethane (DCM) as eluent provided the 0.16 g in 62 percent yield;

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 38573-88-5.

Reference:
Article; More, Kunal N.; Hong, Victor S.; Lee, Ahyeon; Park, Jongsung; Kim, Shin; Lee, Jinho; Bioorganic and Medicinal Chemistry Letters; vol. 28; 14; (2018); p. 2513 – 2517;,
Bromide – Wikipedia,
bromide – Wiktionary

38573-88-5,Some common heterocyclic compound, 38573-88-5, name is 1-Bromo-2,3-difluorobenzene, molecular formula is C6H3BrF2, 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.

4-(19): 1-(2,3-Difluorophenyl)-2-(1-(trityloxy)but-3-en-2-yloxy)ethanone Isopropylmagnesiumchloride-LiCl complex (1.30 M in THF, 155.0 mL, 0.0715 mol) under nitrogen was cooled to 0-5¡ã C., and 2,3-difluorobromobenzene (13.8 g, 0.0715 mol, 1.50 equiv.) was added while T<10¡ã C. After 1 h at 0-5¡ã C., a solution of 1-morpholino-2-(1-(trityloxy)but-3-en-2-yloxy)ethanone (21.8 g, 0.048 mol, 1.0 equiv.) in THF (2.0 vols) was added while T<10¡ã C. The reaction mixture was stirred for 2.5 h and monitored for consumption of 1-morpholino-2-(1-(trityloxy)but-3-en-2-yloxy)ethanone (target>97percent). The reaction mixture was quenched by charging into cold sat. aq. NH4Cl (110 mL) and water (33 mL) while T<20¡ã C. 2-Methoxy-2-methylpropane (218 mL) was added and the layers were separated. The organics were washed with sat. aq. NH4Cl (65 mL) and 18percent aq. NaCl (44 mL). The organics were concentrated under vacuum T<25¡ã C. to a light yellow oil (21.6 g). 1H NMR (500 MHz, CDCl3) delta ppm 7.70-7.64 (m, 1H), 7.47-7.42 (m, 6H), 7.37-7.30 (m, 1H), 7.30-7.25 (m, 6H), 7.24-7.19 (m, 3H), 7.19-7.13 (m, 1H), 5.84-5.71 (m, 1H), 5.30 (d, J=17.3 Hz, 1H), 5.25 (d, J=10.4 Hz, 1H), 4.78 (dd, J=17.7, 3.1 Hz, 1H), 4.70 (dd, J=17.7, 3.1 Hz, 1H), 4.03 (dd, J=11.8, 6.5 Hz, 1H), 3.35 (dd, 1=9.8, 6.4 Hz, 1H), 3.18 (dd, J=9.8, 4.6 Hz, 1H); 13C NMR (125 MHz, CDCl3) delta ppm 194.15 (dd, JCF=4.9, 2.4 Hz), 150.77 (dd, JCF=250.3, 14.1 Hz), 150.29 (dd, JCF=256.4, 13.9 Hz), 143.98, 135.34, 128.75, 127.76, 126.95, 125.70 (d, JCF=12.0 Hz), 125.16 (d, JCF=3.5 Hz), 124.55 (dd, JCF=6.4, 4.2 Hz), 121.62 (d, JCF=17.6 Hz), 118.83, 86.78, 81.35, 74.98 (d, JCF=9.5 Hz), 66.71. These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 38573-88-5, its application will become more common. Reference:
Patent; EISAI R&D MANAGEMENT CO., LTD.; Takaishi, Mamoru; Ishida, Tasuku; US2014/179690; (2014); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Adding a certain compound to certain chemical reactions, such as: 38573-88-5, name is 1-Bromo-2,3-difluorobenzene, 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 38573-88-5, 38573-88-5

Under a nitrogen atmosphere, 2,2,6,6-tetramethylpiperidine (48.5 mL) and THF (250 mL) were put in a reaction vessel, and the resulting mixture was cooled to 0¡ãC. Then, n-butyllithium (1.60 M; n-hexane solution; 178 mL) was slowly added thereto, and the resulting mixture was stirred for 1 hour. Next, the resulting mixture was cooled to -70¡ãC, and then a THF (500 mL) solution of compound (T-1) (50.0 g) was slowly added thereto, and stirred for 1 hour, and then N,N-dimethylformamide (DMF) (40.1 mL) was slowly added thereto, and stirred for 12 hours while the mixture was returned to room temperature. The resulting reaction mixture was poured into a saturated aqueous solution of ammonium chloride, and the resulting aqueous layer was subjected to extraction with ethyl acetate. Then, organic layers combined were washed with brine, and dried over anhydrous magnesium sulfate. The resulting solution was concentrated under reduced pressure, and the residue was purified by silica gel chromatography (hexane : ethyl acetate = 5 : 1 in a volume ratio). Then, the resulting product was further purified by recrystallization from a mixed solvent of hexane and ethyl acetate (1 : 1 in a volume ratio) to give compound (T-2) (46.9 g; 82percent).

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-2,3-difluorobenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; JNC Corporation; JNC Petrochemical Corporation; TANAKA, Hiroyuki; ENDOU, Hiroshi; EP2957554; (2015); 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. 38573-88-5, name is 1-Bromo-2,3-difluorobenzene, This compound has unique chemical properties. The synthetic route is as follows., 38573-88-5

To a solution of 1-bromo-2,3-difluorobenzene (2.48 g, 12.86 mmol) in dry diethylether (40 ml) at -78¡ã C. was added dropwise n-butyllithium (2.5 M in hexane, 5.1 ml, 12.86 mmol). The mixture was stirred for 30 min after which a solution of 1-Boc-azetidone (2.0 g, 11.69 mmol) in dry diethyl ether (20 mL) was added dropwise. The resulting mixture was stirred at -78¡ã C. for 30 min and then brought to ambient temperature and stirred for 1 h. Aqueous saturated ammonium chloride (50 mL) was added and the mixture was extracted with ethyl acetate (2.x.50 ml). The combined organic phase was dried (Na2SO4), filtered and evaporated to dryness. The crude product was purified by flash column chromatography on silica gel (ethylacetate/isooctane 1:1) to give the title compound Yield: 1.89 g. MS m/z (rel. intensity, 70 eV) 285 (M+, 1), 156 (68), 141 (40), 127 (63), 57 (bp).

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; NSAB, FILIAL AF NEUROSEARCH SWEDEN AB, SVERIGE; US2011/257148; (2011); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

The chemical industry reduces the impact on the environment during synthesis 38573-88-5, name is 1-Bromo-2,3-difluorobenzene, I believe this compound will play a more active role in future production and life. 38573-88-5

Preparation 8; TERT-BUTYL S-^1S-DIFLUOROPHENYL)-S-HYDROXYAZETIDINE-I – CARBOXYLATE; To a solution of 3-bromo-1 ,2-difluorobenzene (2.3 g, 11.8 mmol) in dry diethylether (20 ml) at -78¡ãC, under nitrogen was added n-butyllithium (2.5 M in hexane, 4.7 ml, 11.8 mmol) dropwise. The mixture was stirred for 1 h after which a solution of 1-Boc-3-azetidinone (2.0 g, 11.7 mmol) in dry diethyl ether (20 mL) was added dropwise. The resulting mixture was stirred at -78¡ãC for 15 min and then brought to ambient temperature and stirred for 2 h. Aqueous ammonium chloride (50 mL, 50percent) and diethylether was added, the organic phase was collected and the aqueous phase was extracted with ethyl acetate (2×50 ml). The combined organic phase was dried (Na2SO4), filtered and evaporated to dryness. The crude product was purified by flash column chromatography on silica gel (ethylacetate/isooctane 1 :4 to 1 : 1 ) to give the title compound (1.9 g). MS m/z (rel. intensity, 70 eV) 285 (M+, 1 ), 156 (55), 141 (69), 127 (bp), 57 (88).

The chemical industry reduces the impact on the environment during synthesis 38573-88-5. I believe this compound will play a more active role in future production and life.

Reference:
Patent; NSAB, FILIAL AF NEUROSEARCH SWEDEN AB, SVERIGE; SONESSON, Clas; SWANSON, Lars; PETTERSSON, Fredrik; WO2010/58017; (2010); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

38573-88-5, name is 1-Bromo-2,3-difluorobenzene, belongs to bromides-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. 38573-88-5

General procedure: To an oven-dried 25 mL Schlenk tube containing a stirring bar was added 4.5 mg Pd(OAc)2 (0.02 mmol), 15.7mg nBuPAd2 (0.44 mmol), 2-bromofluorobenzene (0.50 mmol), salicylaldehyde (0.50 mmol), potassium carbonate (1.0 mmol). The Schlenk tube was vacuumed and then purged with argon before DMF (2.0 mL) was injected using a syringe. Afterwards the Schlenk tube in the ice bath was degassed by evacuation and back fillingwith argon three times. The reaction mixture was then stirred for 12 h at 120 ¡ãC. After the reaction was complete,the reaction mixture was diluted with water (5 mL), extracted with ethyl acetate (3 x 10 mL) and dried withanhydrous Na2SO4. After filtration and addition of silica gel into the solution, the organic solvent was reduced evaporated. The crude product was purified by column chromatography using ethyl acetate/n-pentane.

Statistics shows that 38573-88-5 is playing an increasingly important role. we look forward to future research findings about 1-Bromo-2,3-difluorobenzene.

Reference:
Article; Shen, Chaoren; Wu, Xiao-Feng; Synlett; vol. 27; 8; (2016); p. 1269 – 1273;,
Bromide – Wikipedia,
bromide – Wiktionary

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 38573-88-5 as follows. 38573-88-5

Intermediate 25; 4-(2,3-Difluorophenyl)-3-butyn-1-ol; To a solution of 1-bromo-2,3-difluorobenzene (10.0 g, 51.82 mmol, Aldrich) in dimethylamine (200 ml) under nitrogen were added Bis(tripheylphenylphosphine)palladium(II) dichloride (0.73 g, 1.037 mmol), copper(I) iodide (0.1 g, 0.525 mmol) and 3-butyn-1-ol (11.76 ml). The temperature was raised from ambient to 65¡ã C. and held there with stirring for 20 h, after which the mixture was cooled and all volatiles removed by rotary evaporation. The residue was partitioned between a mixture of 2N HCl (400 ml), brine (100 ml) and dichloromethane (400 ml). A second 100 ml dichloromethane extract and the layers were separated and aqueous was washed with DCM (100 ml). Extracts were combined and the mixture passed through a hydrophobic frit and evaporated under reduced pressure to give a dark brown oil. This oil was purified using a CombiFlash.(R). Companion.(R). 330 g Redisep.(R). silica column eluting with a gradient of cyclohexane:ether (0 to 100percent) affording the title compound as a light orange oil (9.149).H.p.l.c. Rt=2.76 min.1H nmr (CDCl3) delta: 1.88 (1H, t), 2.75 (2H, t), 3.86 (2H, q), 7.01 (1H, m), 7.10 (1H, m), 7.17 (1H, m).

According to the analysis of related databases, 38573-88-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Camus, Laure; Chudasama, Reshma; Day, Caroline Jane; Deshmukh, Deepali; Gleason, John Gerald; Harling, John David; Lee, Chao-Pin; Saklatvala, Paula; Senger, Stefan; Vallance, Sarah; Watson, John; Watson, Nigel Stephen; Young, Robert John; Yuan, Barbara; US2008/306045; (2008); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

38573-88-5, 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. 38573-88-5, name is 1-Bromo-2,3-difluorobenzene belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Example 2Preparation of (4-bromo-2,3-difluorophenyl)trimethylsilaneDiisopropylamine (7.86 grams (g), 78 mmol) was dissolved in tetrahydrofuran (THF; 104 mL) and cooled to -75¡ã C. utilizing a dry ice/acetone bath.A solution of n-BuLi (2.5 M in hexanes; 22.80 mL, 57.0 mmol) was added dropwise, and the solution was again cooled to -75¡ã C. 1-Bromo-2,3-difluorobenzene (10 g, 51.8 mmol) was dissolved in THF (25.9 mL), and the solution was added dropwise keeping the temperature below -60¡ã C.The reaction mixture was then allowed to warm to -15¡ã C. before cooling again to -75¡ã C. TMSCl (7.29 mL, 57.0 mmol) was then added dropwise, and the reaction mixture was allowed to warm to 25¡ã C. and then concentrated under vacuum.The residue was partitioned between ethyl acetate (EtOAc) and H2O.The organic phase was washed twice more with H2O and concentrated.Kugelrohr distillation at 88¡ã C. provided the product in greater purity but an impurity was distilling at that temperature.Kugelrohr distillation of that purified distillate at 75¡ã C. led to purer product but some product was left in the pot.This process yielded the title compound as a clear oil (3.0 g, 21.83percent, 90percent purity): 1H NMR (300 MHz, CDCl3) delta 7.28 (ddd, J=7.8, 5.2, 1.3 Hz, 1H), 6.98 (ddd, J=8.0, 4.8, 1.9 Hz, 1H), 0.32 (s, 9H); EIMS m/z 264, 266.

The synthetic route of 38573-88-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Epp, Jeffrey B.; Lowe, Christian T.; Renga, James M.; Schmitzer, Paul R.; Eckelbarger, Joseph D.; Guenthenspberger, Katherine A.; Siddall, Thomas L.; Yerkes, Carla N.; Fischer, Lindsey G.; Giampietro, Natalie C.; Kister, Jeremy; Roth, Joshua; US2013/5574; (2013); A1;,
Bromide – Wikipedia,
bromide – Wiktionary