Author: Jessica.F

Adding a certain compound to certain chemical reactions, such as: 66315-23-9, name is Ethyl 3-amino-4-(methylamino)benzoate, 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 66315-23-9, COA of Formula: C10H14N2O2

Step 1-1-4 Ethyl 1-methyl-1H-benzimidazole-5-carboxylate Ethyl 3-amino-4-methylaminobenzoate (24.1 g, 124 mmol) in the Step 1-1-3 was dissolved in formic acid (200 ml), and the solution was heated under reflux for 2 hours. After being cooled by ice, the solution was neutralized with a 25% ammonia water. The solution was subjected to extraction with chloroform, and the extract was dried over anhydrous magnesium sulfate and then concentrated. The concentrate was purified by silica gel column chromatography (chloroform:methanol=20:1) to give the title compound (26.1 g, quantitative) as a light-purple powder. 1H-NMR (CDCl3) delta: 8.52 (d, J=1.5 Hz, 1H), 8.04 (dd, J=1.5, 8.5 Hz, 1H), 7.92 (s, 1H), 7.39 (d, J=8.5 Hz, 1H), 4.40 (q, J=7.3 Hz, 2H), 3.86 (s, 3H), 1.41 (t, J=7.3 Hz, 3H) Mass, m/z: 204 (M+), 159 (base)

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, Ethyl 3-amino-4-(methylamino)benzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Uchida, Hiroshi; Asagarasu, Akira; Matsui, Teruaki; US2013/79306; (2013); A1;,
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Synthetic Route of 39552-81-3, 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 39552-81-3 as follows.

EXAMPLE 3 N-(4-Methoxycarbonylmethylphenyl)-L-glutamine: Compound (3) Following the procedure described in (a) of Example 1, 11.14 g (0.03 mole) of N-carbobenzoxy-L-glutamic acid alpha-benzyl ester was reacted with 4.96 g (0.03 mole) of methyl p-aminophenylacetate to give 13.38 g (88% yield) of an intermediate. The intermediate was dissolved in 500 ml of tetrahydrofuran, 200 ml of methanol and 100 ml of water. To the solution was added 0.5 g of palladium black and the mixture was subjected to hydrogenation at atmospheric pressure to give 6.09 g (79% yield) of N-(4-methoxycarbonylmethylphenyl)-L-glutamine, m.p. 183.3-184.2 C. [alpha]D25 =+29.2 (c=1 2 N HCl)

According to the analysis of related databases, 39552-81-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Mitsubishi Chemical Industries Ltd.; Nippon Shinyaku Co., Ltd.; US4439448; (1984); 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. 2672-58-4, name is Trimethyl benzene-1,3,5-tricarboxylate, A new synthetic method of this compound is introduced below., Formula: C12H12O6

The acid chloride (43) was prepared as follows. Trimethyl-1 ,3,5-benzenetricarboxylate (46) was converted to the mono-acid diester (47) according to literature procedures (Dimick, et al. “On the Meaning of Affinity: Cluster Glycoside Effects and Concanavalin A” J. Am. Chem. Soc. 1999, 121 , 10286- 10296), and compound 47 was refluxed in excess thionyl chloride to give acid chloride 43 (Scheme 5).

The synthetic route of 2672-58-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ARIZONA BOARD OF REGENTS, A BODY CORPORATE OF THE STATE OF ARIZONA, ACTING FOR AND ON BEHALF OF ARIZONA STATE UNIVERSITY; WAGNER, Carl E.; JURUTKA, Peter W.; MARSHALL, Pamela A.; VAN DER VAART, Arjan; WO2011/103321; (2011); A1;,
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Adding a certain compound to certain chemical reactions, such as: 33491-30-4, name is 8-Bromo-2H-chromen-2-one, 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 33491-30-4, Application In Synthesis of 8-Bromo-2H-chromen-2-one

General procedure: Under inert atmosphere (N2), in a 25 mL round bottom flask, Ar3Bi (0.208 mmol; 0.35 eq.), CsF (0.24 g: 1.8 mmol; 3 eq.), PPh3 (0.004 g: 0.018 mmol; 3 mol%), the aryl bromide (0.60 mmol; 1 eq.) was added to DMF (5 mL). The solution was warmed to 90 C prior addition of PEPPSI IPr (0.012 g: 0.018 mmol; 3 mol%). The reaction was monitored by GC/MS to follow the total consumption of the aryl bromide. Cooled to room temperature (RT), the reaction mixture was diluted by addition of diethyl ether (20 mL) and aqueous HCl 6 M (30 mL). After decantation, the aqueous solution was extracted with diethylether (2 * 20 mL). The collected organic phases were then washed with HCl 6 N (2 * 25 mL), water (25 mL) and brine (25 mL) prior drying over MgSO4. After concentration under reduced pressure, the resulting crude product was subjected to purification by column chromatography leading after concentration under reduced pressure to the title compound.

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:
Article; Cassirame, Benedicte; Condon, Sylvie; Pichon, Christophe; Journal of Molecular Catalysis A: Chemical; vol. 425; (2016); p. 94 – 102;,
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Reference of 18355-74-3,Some common heterocyclic compound, 18355-74-3, name is Methyl 2,3-difluorobenzoate, molecular formula is C8H6F2O2, 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.

[000113] To a stirred solution of compound 44 (800 mg, 4.65 mmol) in DMF (10 mL) under inert atmosphere were added (4-methoxyphenyl) methanethiol 8 (282 mg, 5.11 mmol), cesium carbonate (1.66 g, 5.11 mmol) at RT and stirred for 6 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted water (25 mL) and extracted with ether (2 x 40 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo to obtain the crude. The crude was purified through silica gel column chromatography using 20% EtOAc/ hexanes to afford compound 45 (750 mg, 53%) as an off- white solid. TLC: 20% EtOAc/ hexanes (R 0.4); 1H NMR (DMSO-d6, 500 MHz): oe 7.49-7.36 (m, 3H), 7.10 (d, J= 8.9 Hz, 2H), 6.79 (d, J= 8.9 Hz, 2H), 4.06 (s, 2H), 3.81 (s, 3H), 3.70 (s, 3H);

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Methyl 2,3-difluorobenzoate, its application will become more common.

Reference:
Patent; INDIANA UNIVERSITY RESEARCH AND TECHNOLOGY CORPORATION; ASSEMBLY BIOSCIENCES, INC.; TURNER, William W.; ARNOLD, Lee Daniel; MAAG, Hans; ZLOTNICK, Adam; WO2015/138895; (2015); A1;,
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Electric Literature of 87661-20-9, 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. 87661-20-9, name is tert-Butyl cyclopropanecarboxylate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

To a solution of (-R NH (4.74 mL, 33.2 mmol) in THF (40 mL) at 0C was added n-BuLi (13.3 mL of a 2.5M solution in hexanes, 33.2 mmol) portionwise. The LDA solution was stirred for 15 min at 0C, then was warmed to RT, and stirred for 30 min at RT, then was cooled to-78C. Tert-butyl cyclopropanecarboxylate (3.78 g, 26.6 mmol) was added dropwise over 10 min. The reaction was stirred at -78C for 2 h, after which l-bromopropane (4.84 mL, 53.2 mmol) was added dropwise over 20 min. The reaction was allowed to slowly warm to RT and stirred overnight at RT, then was quenched with satd aq. NH4Cl and extracted with EtOAc (2x). The combined organic extracts were washed with brine, dried (MgSCri), and concentrated in vacuo. The residue was distilled under reduced pressure (20 torr, BP = 95C) to give the title compound (2.99 g, 61 % yield) as an oil. NMR (500 MHz, CDCb) d 1.48 (m, 4H), 1.45 (s, 9H), 1.12 (m, 2H), 0.92 (m, 3H), 0.61 (m, 2H).

The synthetic route of tert-Butyl cyclopropanecarboxylate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; CHENG, Peter Tai Wah; KALTENBACH III, Robert F.; SHI, Jun; SHI, Yan; ZHANG, Hao; (0 pag.)WO2020/60915; (2020); A1;,
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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. 17229-14-0, name is Ethyl 2-(2-chloroethoxy)acetate, A new synthetic method of this compound is introduced below., Computed Properties of C6H11ClO3

EXAMPLE 58 Ethyl (S)-2-(1,2,3,4,10,14b-hexahydrodibenzo[c,f]pyrazino[1,2-a]azepin-2-yl)ethoxyacetate 32.48 g of (S)-1,2,3,4,10,14b-hexahydrodibenzo[c,f]pyrazino[1,2-a]azepine (prepared as described in Preparation 3), 22.7 g of ethyl 2-chloroethoxyacetate, 48.9 g of sodium carbonate and 0.79 g of sodium iodide were added to 340 ml of 4-methyl-2-pentanone, and the mixture was heated under reflux for 16 hours. At the end of this time, it was cooled to room temperature and was filtered using a Celite filter aid, and the filtrate was concentrated by evaporation under reduced pressure. The resulting residue was subjected to column chromatography through silica gel eluted with a 1:1 by volume mixture of ethyl acetate and hexane, to give 44.85 g (yield 91%) of the title compound as a pale yellow oil.

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; Sankyo Company, Limited; US5362725; (1994); A;; ; Patent; Sankyo Company, Limited; US5476848; (1995); A;,
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Some common heterocyclic compound, 41727-48-4, name is Methyl 4-amino-3,5-dichlorobenzoate, molecular formula is C8H7Cl2NO2, 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. Recommanded Product: Methyl 4-amino-3,5-dichlorobenzoate

EXAMPLE 5 1-Acetyl-2-(4-carbomethoxy-2,6-dichlorophenylimino)imidazolidine Methyl-4-amino-3,5-dichlorobenzoate (16.8 g, 31 mmole), 1-acetyl-2-imidazolidone (4.3 g, 33.5 mmole) in phosphoryl chloride (44 ml) were stirred at 50 C. for 3 days. After cooling the phosphoryl chloride was evaporated to give an oily residue. Iced water was added to the residue which was then basified with aqueous sodium hydroxide. The mixture was extracted with methylene chloride which was then washed with water, dried (magnesium sulphate) and evaporated to give a creamy solid. This solid was recrystallized from toluene to give the title compound (7.7 g) mp 188-189 C. Analysis calculated for C13 H13 Cl2 N3 O3: Theory: C, 47.30; H, 3.97; N, 12.73. Found: C, 47.34; H, 3.88; N, 12.60.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 41727-48-4, its application will become more common.

Reference:
Patent; Beecham Group p.l.c.; US4505926; (1985); A;,
Ester – Wikipedia,
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These common heterocyclic compound, 13031-39-5, name is 3-Chlorophenyl acetate, 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. Formula: C8H7ClO2

i) 4-Chloro-2-hydroxyacetophenone In a 500 mL of round bottom flask purged with argon was placed 26.00 g (0.153 mol) of 3-acetoxychlorobenzene, cooled with ice bath. Then 30.00 g (0.225 mol) of AlCl3 was added in portions. The resulting mixture was heated to 140 C. for 2 h (caution: vigorous evolution of gas) and then cooled to 0 C. treated with 15 mL of conc. HCl in 100 mL of ice water, extracted with EtOAc (3×300 mL). The combined organic extracts were washed with brine and dried (Na2SO4). Removal of the solvent gave 24.00 g (92%) of the title compound as a light yellow liquid: 1H NMR (250 MHz, CDCl3) d 10.7 (s, 1H), 7.65 (d, J=8.6 Hz, 1H), 6.98 (d, J=1.8 Hz, 1H), 6.87 (dd, J=1.8, 8.6 Hz, 1H), 2.61 (s, 3H).

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

Reference:
Patent; SmithKline Beecham Corporation; US6353116; (2002); B1;,
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Synthetic Route of 33577-99-0, These common heterocyclic compound, 33577-99-0, name is Methyl 2-ethynylbenzoate, 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: Appropriate halogenoarene (1 eq) was dissolved in triethylamine(TEA) and the solution was cooled to 0 C. Then a traceamount of copper iodide and bis(triphenylphosphine)palladium(II)dichloride, Pd[(C6H5)3P]2Cl2 as catalysts were added. After a fewminutes acetylene derivative (2 eq) was added. The reactionmixture was stirred for about 9 h and then was filtered, extracted with ethyl acetate andwashed withwater. Combined organic layerswas dried over anhydrous magnesium sulfate, filtered and thesolvent was evaporated. The pure products 1a-2a were isolated by:crystallization from a mixture of ethyl acetate and petroleum ether(1a) and ethyl acetate (2a) or by column chromatography on silicagel (petroleum ether/ethyl acetate 20:1 (v/v) (5b)).

Statistics shows that Methyl 2-ethynylbenzoate is playing an increasingly important role. we look forward to future research findings about 33577-99-0.

Reference:
Article; Szyszkowska, Ma?gorzata; Czaplewski, Cezary; Wiczk, Wies?aw; Journal of Molecular Structure; vol. 1138; (2017); p. 81 – 89;,
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