Esters-buliding-blocks

14062-24-9, name is Ethyl 4-chlorophenylacetate, belongs to esters-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. category: esters-buliding-blocks

A solution of (4-chlorophenyl) acetic acid (20.0 g, 0.12 mol) and conc sulfuric acid (2 g) in [ETOH] (150 mL) was heated under reflux for 19 h, cooled, and then concentrated. Diethyl ether (100 mL) was added and the solution was washed with sat’d NaHCO3 solution (40 mL x 2), dried, and the volatiles removed. This provided (4- chlorophenyl) acetic acid ethyl ester as an oil (22.3 g, 96%). Ethyl formate (7.46 g, 0. [101 MOL)] was added dropwise to a stirred ice-cooled suspension of (4-chlorophenyl) acetic acid ethyl ester (20.0 g, 0. [101] mol) and NaH (0.131 mol) in diethyl ether (100 mL). The mixture was then allowed to warm to room temperature overnight. The mixture neutralised (1 M HC1) ; the organic layer was isolated, dried, and the solvent removed to give [2- (4-CHLOROPHENYL)-3-OXO-PROPANOIC] acid ethyl ester as a colourless solid (19.8 g, [87%). 1H NMR (CDCL3)] : [No. ] 12.14 (d, J=12. 8,1 H), 7. [31-7.] 18 (m, 4 H), 4.29 (q, [J=7.] 2,2 H), 1.57 (br, [1] H), 1.29 (t, J=7, 2,3 H).

The synthetic route of 14062-24-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Prana Biotechnology Limited; WO2004/31161; (2004); A1;,
Ester – Wikipedia,
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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. 52727-57-8, name is Methyl 2-amino-5-bromobenzoate, A new synthetic method of this compound is introduced below., Recommanded Product: 52727-57-8

To a suspension of lithium aluminium hydride (0.33 g, 8.7 mmol) in THF (10 ml) was added a solution of methyl 2-amino-5-bromobenzoate (2.0 g, 8.7 mmol) in 20 ml THF at 0 C. under nitrogen. Then stirring was continued for 2 h. 0.64 ml water, 2 M solution of sodium hydroxide (0.64 ml) and again 1.28 ml water were added before the resulting mixture was filtered through celite. Evaporation of the solvent and purification of the crude product by flash chromatography on silica gel (dichloromethane/ethyl acetate, 2/1) yielded (2-amino-5-bromophenyl)methanol (1.0 g, 5.2 mmol, 59%) as off-white 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:
Patent; Universitat des Saarlandes; US2011/112067; (2011); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

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. 37722-82-0, name is Methyl 3-Hydroxycyclohexanecarboxylate, A new synthetic method of this compound is introduced below., Formula: C8H14O3

Methyl 3-oxocvclohexanecarboxylateRuthenium (IV) oxide hydrate (1.47 g, 1 1.1 mmol) and sodium bromate (100 g, 664 mmol) were combined in diethyl ether (600 mL) and water (300 mL). The resulting black mixture was stirred for 10 min and then cooled in an ice bath. Methyl 3- hydroxycyclohexanecarboxylate (35 g, 221 mmol) was dissolved in ether (to bring total volume to 100 mL) and was added dropwise to the ice cold reaction mixture. The temperature was not allowed to go above 30 C. The reaction mixture was stirred for 1 h with the reaction temperature at -15 C. Isopropanol was carefully added to the reaction mixture at a rate necessary to keep the reaction temperature at -27 C. The layers were separated and the organic layers were washed with ether. The combined organics were washed with saturated aqueous NaHC03 solution and brine. The organics were then dried over MgS04, filtered, and concentrated to provide methyl 3-oxocyclohexanecarboxylate (34.5 g, 100 % yield) which was used without further purification. H NMR (400 MHz, CDCI3) delta 3.68 (s, 3H), 2.79 (m, 1 H), 2.52 (d, J = 7.78 Hz, 2H), 2.23 – 2.42 (m, 2H), 1.98 – 2.15 (m, 2H), 1.82 (d, J = 10.29 Hz, 1 H), 1.61 – 1.77 (m, 1 H).

The synthetic route of 37722-82-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; GLAXOSMITHKLINE LLC; BROOKS, Carl; CHEUNG, Mui; EIDAM, Hilary, Schenck; GOODMAN, Krista, B.; HAMMOND, Marlys; HILFIKER, Mark, A.; HOANG, Tram, H.; PATTERSON, Jaclyn, R.; STOY, Patrick; YE, Guosen; WO2013/12500; (2013); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Adding a certain compound to certain chemical reactions, such as: 383-62-0, name is Ethyl 2-chloro-2,2-difluoroacetate, belongs to esters-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 383-62-0, COA of Formula: C4H5ClF2O2

EXAMPLE 174(R)-5-(5-(Difluoromethoxy)pyrimidin-2-yloxy)-N-(4-(morpholin-2-yl)phenyl)pyrimidin-2-aminea) 2-Chloro-5-(5-(difluoromethoxy)pyrimidin-2-yloxy)pyrimidine2-Chloropyrimidin-5-ol (0.5 g) was combined with DMF (5 ml) to give a colourless solution. K2CO3 (582 mg) and ethyl 2-chloro-2,2-difluoroacetate (534 mul) were then added. The reaction mixture was stirred at 70 C. overnight to afford a brown suspension. The reaction mixture was then poured into EtOAc and washed sequentially with water and with saturated brine. The organic layer was separated, dried over Na2SO4 and concentrated in vacuo. The crude material was purified by flash chromatography (silica gel; gradient: 0% to 60% EtOAc in hexanes) to afford 2-chloro-5-(5-(difluoromethoxy)pyrimidin-2-yloxy)pyrimidine (154 mg, 15%) as a yellow solid. MS (ISP): 277.0 ([{37Cl}M+H]+), 275.0 ([{35Cl}M+H]+).

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; Galley, Guido; Norcross, Roger; Pflieger, Philippe; US2012/245172; (2012); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of 206551-41-9, These common heterocyclic compound, 206551-41-9, name is Methyl 3-bromo-2-fluorobenzoate, 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.

Step B: Methyl 3-amino-2-fluorobenzoate; In a 500 mL flask was placed 1,1-dimethylethyl carbamate (6.03 g, 51.5 mmol), methyl 3-bromo-2-fluorobenzoate (10 g, 42.9 mmol), Pd2(dba)3.CHCl3 (0.89 g, 0.86 mmol), xantphos (1.49 g, 2.57 mmol) and cesium carbonate (16.8 g, 51.5 mmol). The flask was sealed with a rubber septum, placed under high vacuum, and toluene (200 mL) was added. Three cycles of high vacuum/N2 were performed and the reaction mixture was stirred at 90 C. overnight. The reaction was filtered through a pad of celite with EtOAc washing and concentrated. To the residue was added DCM (200 mL) followed by TFA (50 mL, 649 mmol), and the mixture was stirred at rt for 1 h. The volatiles were removed under reduced pressure and the residue was taken up in EtOAc and washed with saturated NaHCO3 and brine. The organic layer was dried over NaSO4, stripped onto silica and column chromatographed on silica with 5% to 50% EtOAc:Hexane to give 5.53 g (76%) of the title compound of Step B. 1H-NMR (400 MHz, DMSO-d6) delta 6.92-7.01 (m, 3H), 5.37 (s, 2H), and 3.81 (s, 3H). MS (ESI): 170 [M+H]+.

The synthetic route of 206551-41-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Adams, Jerry Leroy; Dickerson, Scott Howard; Johnson, Neil W.; Kuntz, Kevin; Petrov, Kimberly; Ralph, Jeffrey M.; Rheault, Tara Renae; Schaaf, Gregory; Stellwagen, John; Tian, Xinrong; Uehling, David Edward; Waterson, Alex Gregory; Wilson, Brian; US2009/298815; (2009); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reference of 455-68-5, 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. 455-68-5 name is Methyl 3-fluorobenzoate, 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.

General procedure: A round bottom centrifuge tube containing catalyst 4 (6.7 mol percent based on the percent phosphorus determined by elemental analysis or as otherwise stated in the footnotes of the corresponding Tables) was equipped with a rubber septum and two magnetic stir bars for extra stirring efficiency. After flushing the tube with argon, it was charged via syringe with a higher ester (5 mmol) and MeOH (5 mL) for transesterifications. For amidations, the tube was similarly charged with an ester (2 mmol), amino alcohol (2 mmol), and THF (3 mL). The reaction mixture was vigorously stirred at room temperature (23-25 ¡ãC) and progress of the reaction was monitored by thin layer chromatography. Upon completion of the reaction, the reaction mixture was filtered through Whatman No. 1 filter paper and washed with 3 .x. 10 mL of THF. The combined organics were subjected to short-path silica gel chromatography (0-20percent ethyl acetate in hexanes v/v) to obtain an analytically pure product. In the case of amides, products were purified using a short-path silica gel column eluted with dichloromethane/methanol (95:5, v/v).

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

Reference:
Article; Chintareddy, Venkat Reddy; Ho, Hung-An; Sadow, Aaron D.; Verkade, John G.; Tetrahedron Letters; vol. 52; 49; (2011); p. 6523 – 6529;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthetic Route of 6962-92-1, 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. 6962-92-1, name is 4-Chlorobutyl acetate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Compound 10 (0.40 g, 1.4 mmol) and 4-chlorobutyl acetate (0.25 g, 1.7 mmol) were dissolved in dimethyl acetamide (10 ml). Potassium carbonate (0.24 g, 1.7 mmol) and potassium iodide (47.5 mg, 0.286 mmol) were added to the resulting solution, and then the solution was stirred at 70 C. for 6 hours. After cooling the solution to room temperature, 1 N hydrochloric acid was added to the solution, followed by extraction with ethyl acetate. The organic layer obtained by extraction was washed once with saline, and sodium sulfate was added to the washed organic layer. The obtained organic layer was filtered to collect the filtrate, and then the solvent was distilled off from the filtrate under reduced pressure. The resulting residue was purified by flash column chromatography to obtain Compound 11 (0.49 g) in the form of a pale yellow oil.

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-Chlorobutyl acetate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; FUJIFILM Corporation; FUKUSHIMA, Yuki; GOTO, Ryoji; US2019/177268; (2019); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of 110-38-3, 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. 110-38-3, name is Ethyl caprate, This compound has unique chemical properties. The synthetic route is as follows.

General procedure: In a glove box in a nitrogen atmosphere, 3.33 mg of ruthenium complex 1c (0.005 mmol) Add to a 125-mL Parr autoclave, After adding 11.2 mg of potassium t-butoxide (0.1 mmol), Then take 2mL of tetrahydrofuran and add it to the kettle for a while. Finally, methyl benzoate (1.3615 g, 10 mmol) was added. After the autoclave is sealed, it is taken out of the glove box. Charge hydrogen to 50 atm. The mixture in the reaction kettle was heated and stirred in an oil bath at 120 C for 10 hours, The reactor was cooled to room temperature in a water bath and the remaining gas was slowly drained from the fume hood. Tridecane (50 muL) was added to the mixture as an internal standard, and the yield of methyl benzoate was determined by gas chromatography to be 99%.

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

Reference:
Patent; Chinese Academy Of Sciences Shanghai Organic Chemistry Institute; Ding Kuiling; Qiu Jia; Yan Tao; Zhang Lei; Wang Zheng; (49 pag.)CN109553641; (2019); A;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Related Products of 94994-25-9, These common heterocyclic compound, 94994-25-9, name is Methyl 4-formylbicyclo[2.2.2]octane-1-carboxylate, 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.

[2-(2-Methyl-1,3-dioxolan-2-yl)ethyl](triphenyl)phosphonium bromide (4-A, Synthesis: 532 (1986)) (5.99 g, 12.7 mmol) was stirred in dry THF (200 mL). Potassium bis(trimethylsilyl)amide (20.4 mL, 2M soln in toluene, 10.2 mmol) was added. The reaction was allowed to stir for 30 min. The reaction mixture was then cooled to -78 C. Methyl 4-formylbicyclo[2.2.2]octane-1-carboxylate was added at -78 C. by cannula. The reaction was allowed to warm to room temperature overnight. The volume was reduced by evaporation of THF in vacuo. 100 mL of water was added. The mixture was then layered with 100 mL of diethyl ether. The ether was extracted and dried (MgSO4). The product (methyl 4-[(1E)-3-(2-methyl-1,3-dioxolan-2-yl)prop-1-enyl]bicyclo[2.2.2]octane-1-carboxylate (4-B)) was purified by flash chromatography on silica gel with 10/90 ethyl acetate-hexane mixture.

The synthetic route of 94994-25-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Waddell, Sherman T.; Santorelli, Gina M.; Maletic, Milana M.; Leeman, Aaron H.; Gu, Xin; Graham, Donald W.; Balkovec, James M.; Aster, Susan D.; US2004/133011; (2004); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Application of 139102-34-4,Some common heterocyclic compound, 139102-34-4, name is Methyl 4-bromo-2-methoxybenzoate, molecular formula is C9H9BrO3, 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 methyl 4-bromo-2-methoxybenzoate (0.95 g, 3.9 mmol) and 4- nitrophenylboronic acid (1.29 g, 7.75 mmol) in toluene (10 mL) was added Na2CO3 (1.85 g, 17.4 mmol), l,r-bis(diphenylphospMno)ferrocenepalladium(IT) chloride complex with dichloromethane (0.06 g, 0.08 mmol), 1,4-dioxane (5 mL), and water (5 mL). The mixture was heated at reflux for 3 h and then allowed to cool to it. The mixture was diluted with EtOAc and water, and the organic layer was isolated, dried over MgSO4, and concentrated in vacuo. The material was purified by column chromatography (25% EtOAc in hexanes), yielding 0.675 g (61%) of the title compound. LC/MS m/z 287.9 (MH+); retention time 3.14 min.

The synthetic route of 139102-34-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BAYER PHARMACEUTICALS CORPORATION; WO2006/44775; (2006); A2;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics