Month: May 2021

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. 5414-19-7, name is 1-Bromo-2-(2-bromoethoxy)ethane, A new synthetic method of this compound is introduced below., Recommanded Product: 5414-19-7

To a dimethylformamide (“DMF”) (50 mL) solution of the product of Part B (6.40 g, 15.2 mmol) was added K2CO3 (6.6 g, 47.8 mmol), 18-crown-6 (1.2 g, 4.5 mmol), and bis(2-bromoethyl)ether (2.8 mL, 22. mmol). The resulting slurry was stirred at 60 C. for 24 hr, and then at room temperature for an additional 16 hr. The solvent was stripped in vacuo, and the residue was partitioned between ethyl acetate (150 mL) and water (100 mL). The organic layer was separated, and the aqueous layer was extracted with EtOAc (3*150 mL) and CH2Cl2 (100 mL). The combined organic layers were dried over MgSO4 and evaporated to form a tan solid. The solid was triturated with diethyl ether, and the precipitate was isolated by filtration and washed with diethyl ether (2*25 mL) to afford 4.79 g (64% yield) of the desired acid in the form of a white solid. LCMS: m/z=513, 515 (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.

Synthetic Route of 592-55-2, 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 592-55-2 as follows.

General procedure: A suspension of methyl 3-hydroxybenzoate (104 mg, 0.68 mmol), 2-bromoethyl ethyl ether (0.22 mL, 2.0 mmol) and K2CO3 (550 mg, 4.0 mmol) in DMF (13 mL) was stirred for 16 h at 70 C. After addition of a saturated solution of NaHCO3 the mixture was extracted with EtOAc. The organic layer was washed with brine and dried over Na2SO4. The solvent was removed under reduced pressure and the residue was purified by flash chromatography (hexane/EtOAc 5:1) to give 4a in 89% yield (136 mg).

According to the analysis of related databases, 592-55-2, the application of this compound in the production field has become more and more popular.

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. 944317-92-4, name is 1-Bromo-4-fluoro-5-isopropyl-2-methoxybenzene, A new synthetic method of this compound is introduced below., COA of Formula: C10H12BrFO

General procedure: A 500 mL dry flask was charged with 1-bromo-4-fluoro-5-isopropyl-2-methoxybenzene (BrMIP) (24.60 g, 0.10 mol) and dissolved in toluene (80 mL) and THF (80 mL). The resulting solution was flushed with argon, and tri- isopropylborate (32 mL, 0.1 mol) was added. The mixture was cooled to -80 C. Then 2.5 n-BuLi in hexanes (48 mL, 0.12 mol) was added slowly, maintaining a temperature below -55C. After completion of the n-BuLi addition, the reaction mixture was slowly warmed (1 hour) to -10C and water (120 mL) was added, followed by commercially available 2-bromo-5-(trifluoromethyl)benzonitrile (Formula VI’, X = Br, R2 = CN) (25.00 g, 0.10 mmol) and the catalyst, 1 , 1 bis( di-tertbutylphosphino)ferrocene palladium dichloride (265 mg, 0.8 mol%) addition. The organic layer turns dark brown immediately. The biphasic mixture is aged at room temperature with vigorous stirring for 12 hours. The aqueous layer was removed and the organic layer was washed with 1 M NaOH (aq) (100 mL), water (300 mL) and filtered through silica gel. The solvent was removed under reduced pressure to yield brown oil which was crystallized from EtOH/water (300/100 mL). The resulting slurry was filtered and the filter cake was washed with cold 50% EtOH. The product was dried at 40 C under vacuum to yield 4′-fluoro-5′- isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-carbonitrile (Formula VII’, Ri = CN, R2 = isopropyl) as a pale white solid (25.20 g, 75%). According to the same procedure in various scales and different concentrations of catalyst some other biaryl of Formula Vlh and Vll2 are prepared and listed in Table 3 and Table 4, respectively. For NMR data and melting points see Table 1 and 2.

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.

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. 74137-36-3, name is 1,3-Dibromo-5-methoxybenzene, A new synthetic method of this compound is introduced below., Recommanded Product: 1,3-Dibromo-5-methoxybenzene

A mixture of 3,5-dibromoanisole (10 mmol, 2.7 g)Diphenylamine (60 mmol, 10 g) was added to a 100 mL three-necked flask,A cuprous iodide (6 mmol, 1.2 g) was added under nitrogen,Potassium carbonate (60 mmol, 8.3 g),Phenanthroline (6 mmol, 1.2 g),50 mL of DMF,The reaction was carried out at 155 ° C for 3 days;The resulting reaction product is subjected to extraction,The extracted organic phase was evaporated to dryness with ethanol,Then recrystallized from ethyl acetate and petroleum ether,To give 4.02 g of intermediate C-1,

The synthetic route of 74137-36-3 has been constantly updated, and we look forward to future research findings.

Application of 51388-20-6,Some common heterocyclic compound, 51388-20-6, name is 4-(Benzyloxy)aniline hydrochloride, molecular formula is C13H14ClNO, 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.

6-(4-Benzyloxyphenylamino)-5-nitronicotinic acid methyl ester (XXIV): To a solution of 6-chloro-5-nitro-nicotinic acid methyl ester (216 mg, 1.0 mmol) and 4-benzyloxyaniline hydrochloride (280 mg, 1.2 mmol) in MeOH (10 mL) was added iPr2NEt (0.35 mL, 2.0 mmol). The resulting mixture was stirred at rt overnight, a red solid precipitated from the mixture, which was collected by filtration. MS (ES, Pos.): m/z 380 [MH+]. 1H NMR (CDCl3, 400 MHz): delta=3.94 (s, 3H), 5.10 (s, 2H), 7.03 (d, J=8.8 Hz, 2H), 7.38-7.46 (m, 5H), 7.50 (d, J=8.8 Hz, 2H), 9.01 (d, J=2.0 Hz, 1H), 9.08 (d, J=2.0 Hz, 1H), 10.2 (br s, 1H).

The synthetic route of 51388-20-6 has been constantly updated, and we look forward to future research findings.

Adding a certain compound to certain chemical reactions, such as: 2741-16-4, name is Isopropoxybenzene, belongs to ethers-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 2741-16-4, Recommanded Product: 2741-16-4

(1) O-isopropylphenol (1.0 g, 7.3 mmol) and allyl bromide (14.6 mmol) were successively added to a 25 mL round bottom flask and dissolved in dichloromethane. (0107) (2) Benzyl tributyl ammonium bromide (0.26 g, 0.73 mmol) was added to another 50 mL flask and dissolved in a 1 M NaOH solution. (0108) (3) The solution obtained in (1) was added slowly to the solution obtained in (2) at room temperature and stirred at room temperature for 2 h. The organic phase was separated, and the aqueous phase was extracted with dichloromethane. The organic phases were combined, washed with water and saturated sodium chloride, dried over anhydrous sodium sulfate, and concentrated to give a colorless liquid. The liquid was heated under nitrogen at 250 C. for 2 h, cooled and purified with column chromatography to give a colorless liquid. The colorless liquid was dissolved in absolute ethanol and reduced by addition of Pd/C to give 2-isopropyl-6-propylphenol: 1H NMR (400 MHz, CDCl3) delta 7.06 (dd, J=7.6, 1.6 Hz, 1H), 6.97 (dd, J=7.5, 1.6 Hz, 1H), 6.85 (t, J=7.6 Hz, 1H), 4.75 (s, 1H), 3.22-3.13 (m, 1H), 2.59-2.54 (m, 2H), 1.72-1.59 (m, 2H), 1.26 (d, J=6.9 Hz, 6H), 0.99 (t, J=7.3 Hz, 3H). (0109) (4) The obtained liquid (1.0 g, 5.6 mmol) was dissolved in 20 mL of dichloromethane, into which the catalyst Cu(OH)Cl.TMEDA (50 mg, 0.1 mmol) was added, and stirred at room temperature to give a red solid quinone which was then reduced with sodium hydrosulfite to give 4,4?-dihydroxy-3,3?-diisopropyl-5,5?-dipropylbiphenyl (1.1 g, 55.5%). (0110) 4,4?-dihydroxy-3,3?-diisopropyl-5,5?-dipropylbiphenyl: 1H NMR (300 MHz, CDCl3) delta 7.29 (s, 4H), 6.52 (s, 2H), 3.13-3.08 (m, 2H), 2.43-2.40 (m, 4H), 1.51-1.43 (m, 4H), 1.03 (d, 12H), 0.84-0.81 (m, 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, Isopropoxybenzene, other downstream synthetic routes, hurry up and to see.

Electric Literature of 349-65-5,Some common heterocyclic compound, 349-65-5, name is 2-Methoxy-5-(trifluoromethyl)aniline, molecular formula is C8H8F3NO, 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.

B3b. General Method for the Reaction of an Aryl Amine with Phosgene with Isolation of the Isocyanate, Followed by Reaction with a Second Aryl Amine; [] Step 1. 2-Methoxy-5-trifluoromethylphenyl Isocyanate: To a solution of phosgene (1.93 M in toluene; 16 mL, 31.4 mmol) in CH2Cl2 (120 mL) at 0 C was added a solution of 2-methoxy-5-(trifluoromethyl)aniline (3.0 g, 15.7 mmol) and pyridine (2.3 mL, 47.1 mmol) in CH2Cl2 (30 mL) dropwise. The resulting mixture was stirred at 0 C for 30 min and at room temp for 3 h, then concentrated under reduced pressure. The residue was diluted with toluene (30 mL), concentrated under reduced pressure, and treated with Et2O. The resulting precipitate (pyridinium hydrochloride) was removed and the filtrate was concentrated under redeuced pressure to give the title compound as a yellow oil (3.0 g) which crystallized upon standing at room temp. for a few days.

The synthetic route of 349-65-5 has been constantly updated, and we look forward to future research findings.

Electric Literature of 102-52-3, These common heterocyclic compound, 102-52-3, name is 1,1,3,3-Tetramethoxypropane, 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.

The 2 (5.0 g, 35.4 mmol) is added into 20 ml glacial acetic acid and 5 ml anhydrous ethanol mixed solution, then dropwise 1, 1, 3, 3 – tetramethoxy propane (6.4 ml, 38.9 mmol), heating to 90 C, reaction 10 h, turns on lathe eliminates ethanol, ethyl acetate extraction, the combined organic phase, saturated sodium bicarbonate solution to wash, anhydrous MgSO4Drying, filtering, turns on lathe does solvent, column chromatography purification to obtain white solid 5.2 g, yield 83%.

Statistics shows that 1,1,3,3-Tetramethoxypropane is playing an increasingly important role. we look forward to future research findings about 102-52-3.

Application of 332-48-9, A common heterocyclic compound, 332-48-9, name is 1-(2-Bromoethoxy)-4-fluorobenzene, molecular formula is C8H8BrFO, 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 piperazine-1-carboxylic acid /er/-butyl ester (1.86 g, 10 mmol) and l-(2- bromoethoxy)-4-fluorobenzene (2.19 g, 10 mmol) in DMF (5 ml) was added CS2CO3 (7.5 g,20 mmol). The mixture was stirred at room temperature for a day, then quenched with water, and extracted with ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous sodium sulphate, and concentrated to yield the title compound quantitatively as an oil (3.25 g) which was used without further purification.1H-NMR (400MHz, DMSO-d6): delta 1.39 (s, 9H), 2.42 (t, 4H), 2.69 (t, 2H), 3.31 (t, 4H), 4.04(t, 2H), 6.95 (m, 2H), 7.10 (t, 2H).

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.

Electric Literature of 3616-56-6, The chemical industry reduces the impact on the environment during synthesis 3616-56-6, name is 2,2-Diethoxy-N,N-dimethylethanamine, I believe this compound will play a more active role in future production and life.

Under a nitrogen atmosphere, 14.1 g (0.061 mol) of Intermediate C, 11.4 g (0.071 mol) of N,N?-dimethylaminoacetaldehyde diethyl acetal, and 110.0 g of acetic acid were stirred for 8 hr while being refluxed under heat at 118° C. After the reaction solution had been cooled to room temperature, the precipitated crystal was taken by filtration and washed with acetic acid (30 ml). The resultant crystal was subjected to re-slurry purification to provide 10.4 g (0.041 mol, yield: 67percent) of 5,12-dihydroindolo[3,2-a]carbazole (IC-5) as a white crystal.

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, 2,2-Diethoxy-N,N-dimethylethanamine, other downstream synthetic routes, hurry up and to see.