Esters-buliding-blocks

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. 5159-59-1, name is Methyl 6-amino-2-naphthoate, This compound has unique chemical properties. The synthetic route is as follows., Computed Properties of C12H11NO2

To a solution of methyl 6-amino-2-naphthoate (1.2 g, 6.0 mmol, 1.0 eq) and 4-(trifluoromethyl)cyclohexanone (2.0 g, 12.0 mmol, 2.0 eq) in DCM (20 mL) were added NaBH(OAc)3 (2.6 mg, 12.0 mmol, 2.0 eq) and HO Ac (360 mg, 6.0 mmol, 1.0 eq). The mixture was stirred at rt for 16 h and washed with sat. aq. NaHC03 (30 mL). The aqueous layer was extracted with EtOAc (30 mLx2). The combined organic layers were combined and concentrated. The residue was washed with MeOH to give the title compound as a yellow solid (700 mg, yield: 30%) with cis isomer only. 1H NMR (400 MHz, CDC13) delta 8.42 (s, 1H), 7.93 (dd, /= 1.6 Hz, 9.2 Hz, 1H), 7.72 (d, /= 9.2 Hz, 1H), 7.59 (d, /= 8.0 Hz, 1H), 6.92 (d, / = 8.0 Hz, 1H), 6.78 (s, 1H), 3.94 (s, 3H), 3.83 (s, 1H), 2.22-2.05 (m, 3H), 1.85-1.60 (m, 6H); ESI-MS (M+H) +: 352.2.

According to the analysis of related databases, 5159-59-1, the application of this compound in the production field has become more and more popular.

Reference:
Patent; BIOGEN IDEC MA INC.; GUCKIAN, Kevin; KUMARAVEL, Gnanasambandam; MA, Bin; MI, Sha; SHAO, Zhaohui; SUN, Lihong; TAVERAS, Arthur; WANG, Deping; XIN, Zhili; ZHANG, Lei; WO2014/18887; (2014); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reference of 2216-92-4, A common heterocyclic compound, 2216-92-4, name is N-Phenylglycine Ethyl Ester, molecular formula is C10H13NO2, 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.

Prepared in the manner of Example 16 except 4- (trifluoromethyl) benzyl bromide was substituted for 4-chlorobenyl chloride. Purification by flash chromatography (10: 1 to 5: 1 hexanes/EtOAc) afforded the title compound as a yellow oil (30%). 1H NMR [(CDCI3)] [8] 7.62 (d, 2H), 7.52 (d, 2H), 7.43 (d, 2H), 6.68 (d, 2H), 4.73 (s, 2H), 4.25 (q, 2H), 4.14 (s, 2H), 1.30 (t, 3H). Anal. Calc. [FOR C21H18NO3FS] : C, 50.11 ; H, 3.60 ; N, 2.78. Found: C, 50.01 ; H, 3.98 ; N, 2.61. HRMS (MH+). Calc. : 504.1221. Found: 504.1227.

The synthetic route of 2216-92-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; PHARMACIA CORPORATION; WO2003/99769; (2003); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Adding a certain compound to certain chemical reactions, such as: 13831-03-3, name is tert-Butyl propiolate, 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 13831-03-3, Product Details of 13831-03-3

General procedure: To a stirred solution of the acetylenic ester (2 mmol) and the 1,3-diketones (2 mmol) in 10 mL of CH2Cl2 was added 0.26 g of isoquinoline (2 mmol) at r.t. After completion of the reaction (2-3 h), as indicated by TLC (AcOEt/hexane, 1:2), the solvent was removed under reduced pressure and the viscous residue was purified by column chromatography on silica gel (Merck 230-400 mesh) using hexane-AcOEt (2:1) as eluent to afford pure title compounds.

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, tert-Butyl propiolate, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Piltan, Mohammad; Yavari, Issa; Moradi, Loghman; Journal of the Iranian Chemical Society; vol. 13; 4; (2016); p. 605 – 608;,
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. 55666-42-7, name is tert-Butyl 2-bromobenzoate, A new synthetic method of this compound is introduced below., Application In Synthesis of tert-Butyl 2-bromobenzoate

tert-Butyl 2-bromobenzoate (51 mg, 0.20 mmol) and anhydrous THF (3 mL) were put into a dried flask inside of which was substituted with argon. The mixture was cooled to -78 C., and then added with 1M sec¡¤BuLi (0.30 mmol), and the mixture was stirred for 20 minutes. The mixture was slowly added with 4,5-difluoro-3,6-diOTBDMS-Si-xanthone (5.4 mg, 0.010 mmol) dissolved in anhydrous THF (3 mL) at the same temperature, and the mixture was returned to room temperature. The mixture was stirred at room temperature for 1 hour, and then added with 2 N HCl (10 mL), and the mixture was stirred for 20 minutes. The mixture was extracted with dichloromethane, and the organic layer was washed with brine, and dried over Na2SO4. The solvent was removed, then the residue was added with TFA (3 mL), and the mixture was stirred at room temperature for 2 hours. The solvent was removed, and then the residue was purified by HPLC to obtain 2-COOH DFTM (2.2 mg, 0.054 mmol, yield 54%). 1H-NMR (300 MHz, CD3OD): delta 0.68 (s, 3H), 0.79 (s, 3H), 6.66 (d, 2H, J=8.8 Hz), 6.87 (t, 2H, J=9.2 Hz), 7.13 (d, 1H, J=7.3 Hz), 7.57-7.68 (m, 2H), 7.92 (d, 1H, J=8.1 Hz) HRMS m/z Found 411.0902, calculated 411.0864 for [M+H]+ (3.8 mmu)

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; THE UNIVERSITY OF TOKYO; Nagano, Tetsuo; Hanaoka, Kenjiro; Koide, Yuichiro; Egawa, Takahiro; Hirabayashi, Kazuhisa; US2013/289256; (2013); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reference of 6091-64-1, The chemical industry reduces the impact on the environment during synthesis 6091-64-1, name is Ethyl 2-bromobenzoate, I believe this compound will play a more active role in future production and life.

General procedure: 5mL of hydrazine monohydrate (80%) was added to a solution of intermediate 3 (5mmol) in ethanol (5mL). The reaction mixture was maintained under reflux for 5h. was then concentrated under reduced pressure and the resulting solid was collected by filtration, washed with cold water and dried to give the desired intermediate 4 as a white solid.

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 2-bromobenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Article; He, Haifeng; Xia, Hongying; Xia, Qin; Ren, Yanliang; He, Hongwu; Bioorganic and Medicinal Chemistry; vol. 25; 20; (2017); p. 5652 – 5661;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthetic Route of 56741-34-5, A common heterocyclic compound, 56741-34-5, name is Methyl 5-amino-2-fluorobenzoate, molecular formula is C8H8FNO2, 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: To a solution of 11a (500 mg, 1.85 mmol) in acetone (10 mL) was added 12 (380 mg, 1.85 mmol) and pyridine (0.45 mL, 5.54 mmol).The mixture was stirred at 55 C for 1 h. The mixture was concentrated,diluted with ethyl acetate and washed with 1M HCl and brine twice.Then, the ethyl acetate layer was dried over anhydrous sodium sulfate andconcentrated to give the crude product. The crude product was purified bysilica column eluting with petroleum ether/ethyl acetate (5/1-2/1) to givethe desired product (0.33 g, yield 44.3%) as grey 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:
Article; He, Yulong; Dou, Huixia; Gao, Dingding; Wang, Ting; Zhang, Mingming; Wang, Heyao; Li, Yingxia; Bioorganic and Medicinal Chemistry; vol. 27; 19; (2019);,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Electric Literature of 1105187-36-7, 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. 1105187-36-7, name is Methyl 3-bromo-4H-thieno[3,2-b]pyrrole-5-carboxylate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

A solution of 3-Bromo-4-(4-trifluoromethyl-benzyl)-4H-thieno[3,2-b]pyrrole-S-carboxylic acid methyl ester (2.3 g), 4-trifluoromethybenzyl bromide (2.4 g) and Cs2CO3 (4 g) was stirred for 14 h at room temperature. The reaction mixture was then diluted with 100 ml of 1:1 hexane/EtOAc and filtered through a pad of silica gel. The filtrate was concentrated to give 4.0 g of the crude title compound which was used for the next step without further purification.

The synthetic route of Methyl 3-bromo-4H-thieno[3,2-b]pyrrole-5-carboxylate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Beta Pharma Canada Inc.; YUAN, Wei, W.; (58 pag.)EP2320906; (2016); B1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reference of 107582-20-7, A common heterocyclic compound, 107582-20-7, name is Methyl 2,3-diaminobenzoate, molecular formula is C8H10N2O2, 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: 800 mg (4.4 mmol) s3 was dissolved in 10 mLacetic acid, 336 mg (4.8 mmol) sodium nitrite was added slowly.The mixture was stirred for 18 h at room temperature, then poured into 30 mL water, neutralized with saturated solution of sodium bicarbonate, extracted with 50 mL ethyl acetate, washed with 20 mL water, dried with anhydrous sodium sulfate overnight. The filtrate was concentrated by vacuum distillation to obtain brown solid, recrystallized from ethyl acetate and hexane to afford pale brown solid of s4 300 mg, yield 35percent.1H NMR(400 MHz, CDCl3): d8.78 (s, 1H, ArH), 8.19 (d, 1H, J = 8.8 Hz, ArH), 7.55 (d, 1H, J = 8.8 Hz, ArH), 4.33 (s, 3H, OCH3), 3.98 (s, 3H, NCH 3 );13C NMR (100 MHz,CDCl3): d 166.6, 145.6, 135.6, 128.2, 126.3, 122.9, 109.0, 52.4, 34.4.HRMS (EI) calcd. for C9H9N3O2 [M]+: 191.0695, found 191.0697.

The synthetic route of 107582-20-7 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Chang, Kang; Chen, Jian-Qin; Shi, Yan-Xia; Sun, Mei-Jian; Li, Peng-Fei; Zhao, Zhen-Jiang; Zhu, Wei-Ping; Li, Hong-Lin; Xu, Yu-Fang; Li, Bao-Ju; Qian, Xu-Hong; Chinese Chemical Letters; vol. 28; 4; (2017); p. 919 – 926;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Application of 23426-63-3, These common heterocyclic compound, 23426-63-3, name is Methyl 2-bromo-2-methylpropanoate, 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 stirred solution of 4-bromo-lH-pyrazole (3.0 g, 20.41 mmol) in dry DMF (30 ml) was added Cs2C03 (19.95 g, 61.23 mmol) and methyl 2-bromo-2-methylpropanoate (3.96 ml, 30.61 mmol) at room temperature under an atmosphere of nitrogen. Then the reaction mixture was stirred at 80 C for 18 hours. After completion of reaction (monitored by TLC), the reaction mixture was diluted with ice cold water (30 ml) and extracted with ethyl acetate (2 x 50 ml). The combined organic layers were washed with brine (50 ml), dried over anhydrous Na2S04 and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography to afford the title compound (3.0 g, 60 %). 1H NMR (400 MHz, DMSO-de): 1.76 (s, 6H), 4.63 (s, 3H), 7.61 (s, 1H), 8.21 (s, 1H).

Statistics shows that Methyl 2-bromo-2-methylpropanoate is playing an increasingly important role. we look forward to future research findings about 23426-63-3.

Reference:
Patent; CONSTELLATION PHARMACEUTICALS, INC.; WILSON, Jonathan, E.; BRUCELLE, Francois; LEVELL, Julian, R.; (153 pag.)WO2019/161162; (2019); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

139102-34-4, name is Methyl 4-bromo-2-methoxybenzoate, 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. Application In Synthesis of Methyl 4-bromo-2-methoxybenzoate

[1003] (l,l’-Bis(ctiphenylphosphmo)ferroc?^ dichloromethane adduct (1.50 g) was added to a mixture of methyl 4-bromo-2-methoxybenzoate (4.50 g), potassium vmyltrifluoroborate (4.92 g), triethylamine (5.12 mL) and ethanol (30 mL), and the resultant was stirred overnight at 100C in an argon atmosphere. Water was added to the reaction mixture, extraction thereof was performed using ethyl acetate, the organic layer was dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. The obtained residue was purified by a silica gel column chromatography (hexane/ethyl acetate), thereby obtaining the title compound (3.53 g). 1H NMR (300 MHz, CDC13) delta 3.88 (3H, s), 3.93 (3H, s), 538 (1H, d, J = 10.9 Hz), 5.84 (1H, d, J = 17.6 Hz), 6.71 (1H, dd, J = 17.6, 10.9 Hz), 6.98 (1H, s), 7.03 (1H, dd, J = 8.0, 1.4 Hz), 7.78 (l d, J = 8.0 Hz).

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

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; KASAI, Shizuo; OGINO, Masaki; MIZOJIRI, Ryo; YAMASAKI, Takeshi; HIROSE, Hideki; TAKAKURA, Nobuyuki; YAMASHITA, Tohru; MORIMOTO, Sachie; NAKAHATA, Takashi; KINA, Asato; WO2014/142363; (2014); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics