Author: Jessica.F

Adding a certain compound to certain chemical reactions, such as: 83881-47-4, name is Methyl 2-(2-chloroethoxy)acetate, 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 83881-47-4, Computed Properties of C5H9ClO3

EXAMPLE 5 Methyl 2-(8-bromo-1,2,3,4,10,14b-hexahydrodibenzo[c,f]pyrazino[1,2-a]azepin-2-yl)ethoxyacetate Following a procedure similar to that described in Example 1, but using 8-bromo-1,2,3,4,10,14b-hexahydrodibenzo[c,f]pyrazino[1,2-a]azepine and methyl 2-chloroethoxyacetate, the title compound was obtained in a yield of 38%. Infrared Absorption Spectrum (CHCl3), numax cm-1: 1455, 1490, 1715, 1760, 2850, 2975.

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, Methyl 2-(2-chloroethoxy)acetate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Sankyo Company, Limited; US5362725; (1994); A;,
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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. 87808-49-9, name is Methyl 2-bromo-4-methylbenzoate, A new synthetic method of this compound is introduced below., Recommanded Product: Methyl 2-bromo-4-methylbenzoate

[0202] A mixture of the above product (0.600 g, 1.57 mmol), methyl 2-bromo-4-methylbenzoate (0.395 g, 1.72 mmol), potassium carbonate (0.541 g, 3.92 mmol), triphenylphosphine (0.016 g, 0.06 mmol), and palladium acetate (3.5 mg, 0.01 mmol) in 7 mL of THF and 0.2 mL of water was heated in a sealed flask at 100 C. overnight. The mixture was then cooled and partitioned between ethyl acetate and water. The organic extract was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The residue was subjected to silica gel chromatography eluted with 0-10% ethyl acetate and hexane to provide methyl 5-methyl-4′-{(1R)-1-[(4-methyl-3-nitropyridin-2-yl)amino]ethyl}-1,1′-biphenyl-2-carboxylate that gave a proton NMR spectrum consistent with theory and a mass ion (ES+) of 406.2 for 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; Kuduk, Scott D.; Bock, Mark G.; Feng, Dong-Mei; Wai, Jenny Miu-Chun; US2004/34064; (2004); A1;,
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90942-47-5, name is Methyl 5-(aminomethyl)-2-chlorobenzoate hydrochloride, 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

To a solution of methyl 5-(aminomethyl)-2-chlorobenzoate hydrochloride (2.50 g,10.59 mmol) in THF (20 mL) were added DIPEA (4.78 g, 37.07 mmol) andisobutyryl chloride (1.70 g, 15.89 mmol). The reaction mass was stirred at RT for 2 h. After completion of the reaction, the reaction mixture was diluted with EtOAc, washed with water and brine, dried over Na2 SO4 and concentrated to afford 1.2 g of the desired product. ?H NIVIR (300 IVIHz, DMSO-d6): 8.35 (t, 1H), 7.66 (s, 1H),7.55-7.52 (d, J= 8.1 Hz, 1H), 7.43-7.40 (d, J 8.1 Hz, 1H), 4.26 (d, J 5.7 Hz, 2H),3.85 (s, 3H), 2.44 (m, 1H), 1.02 (d, J= 6.9 Hz, 6H); MS [M+H]: 270.12.

The synthetic route of 90942-47-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; GLENMARK PHARMACEUTICALS S.A.; GHARAT, Laxmikant Atmaram; MUTHUKAMAN, Nagarajan; TAMBE, Macchindra Sopan; PISAL, Dnyandeo; KHAIRATKAR-JOSHI, Neelima; KATTIGE, Vidya Ganapati; WO2015/59618; (2015); A1;,
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Electric Literature of 3095-48-5, 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. 3095-48-5, name is Methyl 4-amino-3,5-dimethylbenzoate, This compound has unique chemical properties. The synthetic route is as follows.

A suspension of 33 g. of dimethylsulfone and 11 g. of sodium hydride (50percent dispersion in oil) in 160 ml. of absolute dimethylsulfoxide was stirred at 50° C. under an atmosphere of nitrogen and the exclusion of moisture for 3 hours. Then, 18 g. of 4-amino-3,5-dimethyl-benzoic acid methyl ester were added. The mixture was stirred at 80° C. for 30 minutes and at room temperature for 1 hour and then dissolved in 400 ml. of water. The solution was neutralized with glacial acetic acid. The precipitate which formed was removed by filtration with suction, washed with water, dried and recrystallized from ethyl acetate, whereby there was obtained 4′-amino-3′,5′-dimethyl-2-(methylsulfonyl)-acetophenone having a melting point of 179°-180° C.

The chemical industry reduces the impact on the environment during synthesis Methyl 4-amino-3,5-dimethylbenzoate. I believe this compound will play a more active role in future production and life.

Reference:
Patent; Hoffmann-La Roche Inc.; US4515948; (1985); A;,
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Some common heterocyclic compound, 14062-29-4, name is Ethyl 2-(3-chlorophenyl)acetate, molecular formula is C10H11ClO2, 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. Product Details of 14062-29-4

EXAMPLE 20 6-(3-Chlorobenzyl)-1-(2-fluorophenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one In analogy to the preparation of Example 9, 171 mg (73% of theory) of the desired product are obtained as a colourless solid starting from 0.15 g (0.66 mmol) of 5-amino-1-(2-fluorophenyl)-1H-pyrazole-4-carboxamide (Example 28A), 0.405 g (98% purity, 1.99 mmol) of ethyl (3-chlorophenyl)acetate and 0.132 g (3.32 mmol) of 60% sodium hydride. m.p.: 197 C. MS (ESI pos): m/z=355 (M+H)+ 1H-NMR (300 MHz, DMSO-d6):delta=3.95 (s, 2H), 7.2-7.7 (m, 8H), 8.3 (s, 1H), 12.5 (s, 1H) ppm.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 14062-29-4, its application will become more common.

Reference:
Patent; Bayer HealthCare AG; US2007/161662; (2007); A1;,
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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. 57486-69-8, name is Methyl 2-(2-bromophenyl)acetate, This compound has unique chemical properties. The synthetic route is as follows., COA of Formula: C9H9BrO2

To a solution of methyl 2-(2-bromophenyl)acetate, 5.00 g (21.8 mmol), in 100 ml. of tetrahydrofuran were added 18-crown-6, 1.44 g (5.5 mmol), iodomethane, 7.35 g (65.5 mmol), and potassium ie f-butoxide, 15.49 g (109.1 mmol). The resulting mixture was stirred at this temperature for 26 hours. The solvent was removed in vacuo and the residue was diluted with ethyl acetate. The resulting solution was washed with water, brine, dried over anhydrous sodium sulfate. The solvent was removed in vacuo and the residue was purified by silica gel column chromatography (petroleum ether:ethyl acetate = 6:1) to give 2.73 g (49%) of the product as a yellow oil. MS (ESIpos): m/z = 257 [M+H]+. LC-MS [Method 4, Water (0.1 %HCOOH)-Acetonitrile, 10%B]: Rt = 1.14 min.

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 57486-69-8.

Reference:
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; WORTMANN, Lars; SAUTIER, Brice; EIS, Knut; BRIEM, Hans; BOeHNKE, Niels; VON NUSSBAUM, Franz; HILLIG, Roman; BADER, Benjamin; SCHROeDER, Jens; PETERSEN, Kirstin; LIENAU, Philip; WENGNER, Antje, Margret; MOOSMAYER, Dieter; WANG, Qiuwen; SCHICK, Hans; (510 pag.)WO2018/172250; (2018); A1;,
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Application of 18595-13-6, 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. 18595-13-6, name is Methyl 2-amino-6-methylbenzoate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Step 2. Preparation of 2-Isopropoxycarbonylamino-6-methyl-benzoic acid methyl ester. Add isopropyl chloroformate (19.8 mL, 19.8 mmol, 1.0 M in toluene) dropwise to a solution of 2-Amino-6-methyl-benzoic acid methyl ester (3.27 g, 19.8 mmol) and pyridine (4.0 mL, 50 mmol) in dichloromethane (39 mL) at 0C under an atmosphere of nitrogen and stir at room temperature for 14 h. Add 1M HCl and separate the layers. Extract the aqueous layer with dichloromethane. Dry the organic layer over anhydrous sodium sulfate, filter, and remove the solvent under reduced pressure. Purify the residue by flash chromatography, eluting with hexanes/ethyl acetate, to afford the title compound (3.80 g, 76%) :’H NMR (CDCl3) 8 1.29 (d, J = 6.5 Hz, 6H), 2.43 (s, 3H), 3.94 (s, 3H), 5.00 (septuplet, J = 6.5 Hz, 1H), 6.90 (d, J = 8.1 Hz, 1H), 7.32 (t, J = 8.1 Hz, 1H), 8.07 (d, J = 8.1 Hz, 1H), 8.86 (brs, 1H). MS (ES+): 252 (M+H).

The synthetic route of Methyl 2-amino-6-methylbenzoate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ELI LILLY AND COMPANY; WO2005/37796; (2005); A1;,
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Reference of 18014-00-1, A common heterocyclic compound, 18014-00-1, name is Dimethyl 2,5-dibromoterephthalate, molecular formula is C10H8Br2O4, 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 5] A mixed liquid of methyl p-dibromoterephthalate (Compound 1)(65.1 g, 185 mmol) synthesised according to the method of a literature (), thiopehne-2-boric acid (Compound 7)(made by Tokyo Chemical Industry Co., Ltd.)(71.0 g, 555 mmol), PdCl2(dppf)·CH2Cl2 (15.1 g, 18.5 mmol), potassium carbonate (84.4 g, 610 mmol) and toluene (6.5 L) was refluxed under a nitrogen atmosphere for 6 hours. After the reaction mixed liquid was allowed to cool to room temperature, water was added to the reaction mixed liquid, and the reaction mixed liquid was subjected to extraction with chloroform. The obtained organic layer was dried with sodium sulfate, and filtered, and thereafter, the solvent was distilled out under reduced pressure. The obtained mixture was recrystallized using hexane and chloroform to obtain dimethyl 2,5-bis(2-thienyl)terephthalate (Compound 8)(45.9 g, 128 mmol) in a yield of 69%. The physical properties of dimethyl 2,5-bis(2-thienyl)terephthalate (Compound 8) were as follows. 1H-NMR (CDCl3, delta ppm): 7.82 (s, 2H), 7.38 (dd, 2H), 7.07-7.12 (m, 4H), 3.78 (s, 6H)

The synthetic route of 18014-00-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Sumitomo Chemical Company, Limited; EP2248818; (2010); A1;,
Ester – Wikipedia,
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Synthetic Route of 945-93-7, A common heterocyclic compound, 945-93-7, name is Ethyl 3-phenylbut-2-enoate, molecular formula is C12H14O2, 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: Unsaturated ester (4a-4d) (0.1 mol) was boiled with 5 N NaOH under a reflux condenser for 2-3 h and left to stir at room temperature overnight. The formed carboxylate salt was dissolved in water and diluted HCl was added. The obtained solid product was filtered and crystallized with EtOH-water. (E) -3-Phenylbut-2-enoic acid (3d) [34]: Yield: 15 g, 94%. Mp: 90-92 C, (lit: 90-92 C). 1 H NMR (400 MHz, CDCl3) , delta (ppm): 7.51-7.49 (3H, m), 7.40-7.38 (2H, m), 6.18 (1H, s), 2.61 (3H, s).

The synthetic route of 945-93-7 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Sari, Sait; Uenalan, Seda; Yilmaz, Mehmet; Turkish Journal of Chemistry; vol. 43; 6; (2019); p. 1656 – 1671;,
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Reference of 23676-08-6, These common heterocyclic compound, 23676-08-6, name is Methyl 4-ethoxybenzoate, 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: 4-dodecyloxy methylbenzoate(13.3 g, 0.04mol)was placed in a one liter single-necked round-bottom flask equippedwith double wall water condenser. Ethanol (250 ml) and potassium hydroxide (6 g, 0.1 mol)dissolved in distilled water (250 ml) were added to the flask. The solution was refluxed for2 hours and allowed to cool down at r.t. and then neutralized with 10% hydrochloric acidto get a white precipitate. It was purified by recrystallizing from methanol.

Statistics shows that Methyl 4-ethoxybenzoate is playing an increasingly important role. we look forward to future research findings about 23676-08-6.

Reference:
Article; Reddy, M. Kesava; Reddy, K. Subramanyam; Prakash; Narasimhaswamy; Molecular Crystals and Liquid Crystals; vol. 582; 1; (2013); p. 1 – 14;,
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