Category: ethers-buliding-blocks

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. 7252-83-7, name is 2-Bromo-1,1-dimethoxyethane belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Application In Synthesis of 2-Bromo-1,1-dimethoxyethane

Example 1. (2S)-4-Methyl-2-[(1R, 5S, 7S)-2-oxo-7-(piperidine-1-carbonyl)-6,8-dioxa-3-aza-bicyclo[3.2.1]oct-3-yl]-pentanoic acid methyl ester [compound formula (I), where R1 = -CH(Leu side chain)COOCH3, R2 = H, R3 and R4 = – CH2(CH2)3CH2-] A solution containing L-leucine methyl ester hydrochloride (2.9 g, 16 mmol), 2-bromo-1,1-dimethoxy ethane (1.9 ml, 2.7 g, 16 mmol), NEt3 (6.7 ml, 48 mmol) and a catalytic amount of KI in DMF (190 ml) was stirred at 120 C for 3 days. The reaction mixture was concentrated under reduced pressure, diluted with water and extracted with DCM. The organic layer was then washed with brine, dried over Na2SO4 and evaporated. The crude product was purified by column chromatography (silica gel, EtOAc/P.E. 1:1) to afford compound of formula (III), where R = Leu side chain, as a yellow oil (1.2 g, 32% yield). [alpha]D24 -3.32 (c 1.0, CHCl3); 1H-NMR (CDCl3, 200 MHz): delta 4.38 (t, J = 6 Hz, 1H), 3.65 (s, 3H), 3.30 (s, 3H), 3.29 (s, 3H), 3.24 (t, J = 6 Hz, 1H), 2.68 (dd, J1 = J2 = 6 Hz, 1H), 2.52 (dd, J1 = J2 = 6 Hz, 1H), 1.71-1.55 (m, 2H), 1.44-1.37 (m, 2H), 0.86 (d, J = 4 Hz, 3H), 0.83 (d, J = 4 Hz, 3H); 13C-NMR (CDCl3, 200 MHz): delta 175.9 (s), 103.6 (d), 59.9 (d), 54.0 (q), 53.1 (q), 51.7 (q), 49.3 (t), 42.8 (t), 25.0 (d), 22.8 (q), 22.5 (q); MS m/z 233 (0.5), 202 (7.2), 174 (33), 158 (14), 75 (100); IR (CHCl3) 2915, 1729, 1130, 1065 cm-1; Anal. Calcd for C11H23NO4 (233.30): C, 56.63; H, 9.94; N, 6.00. Found: C, 57.49; H, 9.90; N, 6.24.

The synthetic route of 7252-83-7 has been constantly updated, and we look forward to future research findings.

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. 36865-41-5, name is 1-Bromo-3-methoxypropane belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. category: ethers-buliding-blocks

[00449] To a 100 mL single-neck flask were added 4-bromo-1 H-pyrazole (3.0 g, 20 mmol), 1-bromo-3-methoxypropane (3.7 g, 24 mmol), cesium carbonate (13 g, 39.90 mmol) and DMF (30 mL). The mixture was heated to 50 C and stirred overnight. The mixture was cooled to rt and to the mixture was added water (50 mL). The mixture was extracted with DC M (50 mL B 4).The combined organic layers were concentrated in vacuo, and the residue was purified by silica gel column chromatography (PE/EA (VN) = 1/1) to give the title compound as colorless oil (4.3 g, 20 mmol, 96%).MS (ESI, pos.ion) m/z: 219.0 [M÷H].

The synthetic route of 36865-41-5 has been constantly updated, and we look forward to future research findings.

Related Products of 150517-75-2, These common heterocyclic compound, 150517-75-2, name is (2-Fluoro-6-methoxyphenyl)methanamine, 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, 4 – dichloro pyrimidine -5 – formamide (210 mg, 1 . 09 mmol) dissolved in tetrahydrofuran (8 ml) in, respectively adding (2 – fluoro -6 – methoxyphenyl) methylamine (170 mg, 1 . 09 mmol) and diisopropyl serotonin reuptake (423 mg, 3 . 27 mmol), 25 C reaction 2 hours. Add saturated salt water (60 ml), stirring 15 minutes after the filtering, the filter cake washing petroleum ether, to obtain white solid 75 mg, yield 66%.

Statistics shows that (2-Fluoro-6-methoxyphenyl)methanamine is playing an increasingly important role. we look forward to future research findings about 150517-75-2.

Related Products of 29026-74-2,Some common heterocyclic compound, 29026-74-2, name is 2-Isopropoxyaniline, molecular formula is C9H13NO, 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: 2-Hydroxynaphthalene-1-carboxylic acid or 1-hydroxynaphthalene-2-carboxylic acid (5.30 mmol) and appropriate alkoxyaniline (5.30 mmol) were suspended in 30 mL of dry chlorobenzene. Phosphorous trichloride (2.65 mmol) was added dropwise, and reacting mixture was heated in the microwave reactor for 15 min at 130 C using infrared flask-surface control of temperature. Solvent was evaporated in vacuum; residue solid was washed with 2M HCl and crystallized from aqueous ethanol. If necessary, column chromatography was used for further purification (mobile phase DCM:MeOH 19:1).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Isopropoxyaniline, its application will become more common.

Reference of 658-89-9, 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. 658-89-9, name is 4-(Trifluoromethoxy)benzene-1,2-diamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

2-Aryl-5-trifluoromethoxybenzimidazole. The modified procedure of Bahrami, K. et. al. (Bahrami K., Khodaei M. M., Kavianinia I. Synthesis 2007, p. 547-550) was used. A solution of 2-amino-4-trifluoromethoxyaniline (0.7 g, 0.0036 Mol) in acetonitrile -CH3CN (5 mL) was mixed with aldehyde (0.0037 Mol) in CH3CN (5 mL) at 20 C. and stirred for 5-10 min. Aqueous 30% H2O2 (0.025 Mol) and concentrated 35% aqueous HCl (0.0126 Mol) were added at 20 C. and the mixture was stirred at this temperature for the 2-5 h (the progress of the reaction was monitored by TLC). Precipitate formed was filtered, washed with CH3CN (2×10 mL) and dried.2-Phenyl-5-trifluoromethoxybenzimidazole. Benzaldehyde was used, Ar=C6H5. Yield 0.76 g (71 wt. %). M.p. 208-210 C. 1H NMR (DMSO-d6): 7.31 (d, J=8.5 Hz, 1H), 7.38 (m, 2H), 7.49 (t, J=8.5 Hz, 1H), 7.83 (s, 1H), 7.95 (d, J=8.5 Hz, 1H), 8.57 (d, J=7.0 Hz, 2H). 13C NMR (DMSO-d6): 107.87, 115.26, 116.42, 120.21 (q, J=255.1 Hz), 126.90, 127.98, 128.84, 130.73, 135.91, 138.10, 144.17, 152.51. 19F NMR (DMSO-d6): -57.60. [M+1]+ 279.

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, 4-(Trifluoromethoxy)benzene-1,2-diamine, other downstream synthetic routes, hurry up and to see.

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. 321-28-8, name is 1-Fluoro-2-methoxybenzene, A new synthetic method of this compound is introduced below., Quality Control of 1-Fluoro-2-methoxybenzene

General procedure: An oven-dried 20 mL scintillation vial, equipped with a magnetic stir-bar, was charged with the starting material (1.0 equiv), DDQ (1.0 equiv), trifluoromethanesulfonic acid (1.4% v/v, 3.0 equiv), and 1,2-dichloroethane (0.05 M). The reaction mixture was then allowed to stir at ambient temperature for 10 h. After this time, methanol (0.05M) was added, and the solution was then allowed to stir at ambient temperature for an additional hour. Upon addition of the methanol, some solids precipitated out of the solution. Then, the solvent was removed from the heterogeneous mixture under reduced pressure. The crude material was purified by either recrystallization (methanol/DCM) or silica-gel column chromatography (hexanes/DCM) to give the title compounds.

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.

Application of 2062-98-8, A common heterocyclic compound, 2062-98-8, name is Perfluoro(2-methyl-3-oxahexanoyl) fluoride, molecular formula is C6F12O2, 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.

EXAMPLE 16 Sodium perfluoro-2-methyl-3-oxahexanoate The procedure of Example 1 was followed using perfluoro-2-methyl-3-oxahexanoyl fluoride (16.6 g, 50 mmol), sodium trimethylsilanolate (5.6 g, 50 mmol), dry o-dichlorobenzene (200 mL), and 1 h at room temperature followed by rapid heating to 150. Sodium perfluoro-2-methyl-3-oxahexanoate (13.6 g, 77% yield) was isolated as a white solid: The 19 F NMR data were the same as reported in Example 15.

The synthetic route of 2062-98-8 has been constantly updated, and we look forward to future research findings.

Electric Literature of 202865-80-3, These common heterocyclic compound, 202865-80-3, name is 4-Bromo-2-fluoro-1-isopropoxybenzene, 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 mixture of 2-amino-5-ethyl-3-(4-methylphenoxy)pyrazine (55.0 mg, 0.240 mmol) and dioxane (1 mL) were added 4-bromo-2-fluoro-1-isopropoxybenzene (61 mg, 0.26 mmol), tris(dibenzylideneacetone)(0) (2.8 mg, 0.0030 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (4.2 mg, 0.0072 mmol) and sodium phenoxide trihydrate (61 mg, 0.36 mmol), and the resulting mixture was heated at reflux for 4 hours. To the reaction mixture was added saturated aqueous sodium bicarbonate, and the mixture was extracted with ethyl acetate. The extract was washed by brine, dried over anhydrous sodium sulphate, and concentrated in vacuo. The resulting residue was purified by reversed-phase HPLC (0.3% formic acid/acetonitrile) to give 5-ethyl-2-(3-fluoro-4-isopropoxyphenylamino)-3-(4-methylphenoxy)pyrazine (17 mg, Yield: 18%)as pale brown solid. 1H-NMR (delta ppm TMS/DMSO-d6): 1.05 (3H, t, J = 7.5 Hz), 1.26 (6H, d, J = 5.8 Hz), 2.33 (3H, s), 2.44 (2H, q, J = 7.5 Hz), 4.45-4.52 (1H, m), 7.05-7.17 (3H, m), 7.25 (2H, d, J = 8.6 Hz), 7.55-7.61 (1H, m), 7.69 (1H, s), 7.85-7.91 (1H, m), 8.93 (1H, s).

Statistics shows that 4-Bromo-2-fluoro-1-isopropoxybenzene is playing an increasingly important role. we look forward to future research findings about 202865-80-3.

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. 36805-97-7, name is 1,1-Di-tert-butoxy-N,N-dimethylmethanamine, This compound has unique chemical properties. The synthetic route is as follows., Quality Control of 1,1-Di-tert-butoxy-N,N-dimethylmethanamine

To a solution of 2,6-dichloroisonicotinic acid (2 g, 10.4 mmol) in toluene (50 mL) N,N dimethylformamide di-tert-butil acetal (15 mL, 62.5 mmol) was added under nitrogen atmosphere and mixture heated at 80 Ethyl acetate was added and organic layer was washed with water and brine, dried (MgSO4), filtered and concentrated to yield the title compound (2.34 g, 87%) as a solid.LRMS (m/z): 249 (M+1)+.1H NMR (400 MHz, CHLOROFORM-d) ppm 1.60 (s, 9 H) 7.74 (s, 2 H)

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 36805-97-7.

Reference of 1462-37-9, These common heterocyclic compound, 1462-37-9, name is ((2-Bromoethoxy)methyl)benzene, 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: alpha-Monosubstituted malonic diester 1 was synthesized according to the reported procedure as follows.3 tert-Butyl methyl malonate was purchased from Kanto Chemical, and used without further purification. The physical properties and spectral data of the new compounds, 2-(2-methylbenzyl)malonate 1g, 2-prenylmalonate 1l, and 2-(2-benzyloxyethyl)malonate 1o, are listed below. A 100 mL round-bottom flask equipped with a stirring bar was charged with tert-butyl methyl malonate (846 muL, 5.0 mmol) and DMF (10 mL). To the solution, sodium hydride (60percent oil suspension, 200 mg, 5.0 mmol) was added. The reaction was allowed to stir at 0 °C for 30 min. To the mixture, corresponding alkyl halide (5.0 mmol) was added at 0 °C and the mixture was stirred at room temperature for 24 h. To the reaction mixture, H2O was added, and the mixture was extracted with CH2Cl2 (3 * 20 mL), dried over MgSO4, and concentrated in vacuo. The remaining residue was purified by silica gel column chromatography (hexane/ethyl acetate) to afford the desired product 1.

Statistics shows that ((2-Bromoethoxy)methyl)benzene is playing an increasingly important role. we look forward to future research findings about 1462-37-9.