Month: September 2021

Application of 179688-27-8, 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. 179688-27-8 name is Ethyl 2-amino-4,5-bis(2-methoxyethoxy)benzoate, 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.

EXAMPLE 113 N’-[2-Carbethoxy-4,5-bis(2-methoxyethoxy)phenyl]-N,N-dimethylformamidine To a stirred solution of 15.7 g (50 mmol) of ethyl 2-amino-4,5-bis(2-methoxyethoxy)-benzoate (Pfizer patent WO 96130347) in 50 ml of DMF at 0 C. was added phosphorous oxychloride (5.6 ml, 60 mmol) during 15 m. The resulting solution was heated at 55 C. for 45 m, cooled, diluted with methylene chloride, and treated at 0 C. with 200 ml of N/i sodium hydroxide during 2 m. The organic layer was separated and washed at 0 C. with water. The solution was dried and evaporated with added toluene present to give 18.4 g of amber oil; NMR (CDCl3) delta 3.02 (s, Me2 N).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Ethyl 2-amino-4,5-bis(2-methoxyethoxy)benzoate, and friends who are interested can also refer to it.

Reference:
Patent; American Cyanamid Company; US6002008; (1999); A;,
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Reference of 13671-00-6, The chemical industry reduces the impact on the environment during synthesis 13671-00-6, name is Methyl 2,6-difluorobenzoate, I believe this compound will play a more active role in future production and life.

General procedure: To a solution of an appropriate methyl esters17(a-j) (1.0 mmol) in 50 mL of methanol was added 99 %hydrazine hydrate (4.0 mmol) and the mixture was refluxedfor 5 h up to reaction completed (TLC). After completionof reaction, it was allowed to cool and the obtained solidwas washed with methanol. The crude products wererecrystallized from ethanol.

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 2,6-difluorobenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Murty; Penthala, Raju; Polepalli, Sowjanya; Jain; Medicinal Chemistry Research; vol. 25; 4; (2016); p. 627 – 643;,
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Adding a certain compound to certain chemical reactions, such as: 18595-18-1, name is Methyl 3-amino-4-methylbenzoate, 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 18595-18-1, Quality Control of Methyl 3-amino-4-methylbenzoate

To a suspension of imidazo[1 ,2-a]pyridine-3-carboxylic acid (1 ) (4.09 g, 25.3 mmol) in dichloromethane (100 mL) and DMF (0.25 mL) at 0 C was added oxalyl chloride (4.15 mL, 48.0 mmol) dropwise over 10 minutes. The reaction was slowly warmed to room temperature and stirred until complete conversion was detected by LCMS. The reaction was subsequently reduced to dryness and suspended in dichloromethane (100 mL) and was added a solution of methyl 3-amino-4-methylbenzoate (2) (4.6 g, 27.9 mmol) in dichloromethane (100 mL) and triethylamine (7.1 mL) . Contents were stirred at room temperature for 4 hours and diluted with dichloromethane (100 mL). The reaction was washed with water, saturated NaHC03, brine, dried over magnesium sulfate, filtered and reduced to dryness. The crude solid was triturated with diethyl ether to remove excess aniline and dried to afford methyl 3-(imidazo[1 ,2-a]pyridine-3-carboxamido)-4- methylbenzoate (3) as a white solid. MS m/z 310.1 (M+1 ) +.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Methyl 3-amino-4-methylbenzoate, and friends who are interested can also refer to it.

Reference:
Patent; IRM LLC; NOVARTIS PHARMACEUTICALS UK LIMITED; LIANG, Fang; GIBNEY, Michael; YEH, Vince; LI, Xiaolin; MOLTENI, Valentina; SHAW, Duncan; BERMAN, Ashley Mitchell; LEWIS, Sarah; LOREN, Jon; FURMINGER, Vikki; WO2013/33620; (2013); A1;,
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14064-10-9, name is Diethyl 2-chloromalonate, 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. HPLC of Formula: C7H11ClO4

Step 3; d3-2-(2-Methoxyphenoxy)propanedioic acid diethyl ester: 2-d3-methoxyphenol (5.9 g, 46 mmol) in ethanol (6 mL) and diethylchloromalonate (11.64 g, 60 mmol) in ethanol (6 mL) were sequentially added to a suspension of sodium methoxide (2.76 g, 51 mmol) in 60 mL of absolute ethanol. Under continuous stirring, the mixture was heated at reflux for about 25 hours, then cooled and maintained at ambient temperature for about 4 days. The reaction mixture was filtered and the filtrate was concentrated. The crude product, a yellow oil, was isolated using standard extractive work up and purified by column chromatography on silica gel to yield 9.1 g of the title compound (69percent yield). 1H NMR (300 MHz, CDCl3) delta 1.31 (t, J=7.2 Hz, 6H), 4.32 (q, J=7.2 Hz, 4H), 5.24 (s, 1H), 6.90 (m, 2H), 7.04 (m, 2H); E1-MS m/z=285 (M+). Step 3 d3-2-(2-Methoxyphenoxy)propanedioic acid diethyl ester: The title compound is made by following the procedure set forth in Example 3, step 3.

The synthetic route of 14064-10-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AUSPEX PHARMACEUTICALS, INC.; US2008/242687; (2008); A1;,
Ester – Wikipedia,
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Synthetic Route of 87-13-8,Some common heterocyclic compound, 87-13-8, name is Diethyl 2-(ethoxymethylene)malonate, molecular formula is C10H16O5, 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.

Compound 1a aniline, ethanol and ethoxymethylenemalonic acid diethyl ester were successively added to a 100 mL single-necked flask, heated to 80 C in an oil bath with electromagnetic stirring and nitrogen/inert gas, and refluxed for 8 h (TLC monitoring reaction Process, developing solvent: V petroleum ether: V ethyl acetate = 6:1), after completion of the reaction, it was cooled, and ethanol was evaporated under reduced pressure to give a black oily liquid 2a.

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

Reference:
Patent; Guangxi Normal University; Pan Chengxue; Wang Zengbo; Su Guifa; Liu Qingqing; Li Xiaojuan; (19 pag.)CN109705037; (2019); A;,
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Adding a certain compound to certain chemical reactions, such as: 606-45-1, name is Methyl 2-methoxybenzoate, 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 606-45-1, category: esters-buliding-blocks

General procedure: Various benzohydrazides 5-7 and 9-13 were obtained accordingto known procedures [40,65] except for benzohydrazides 4and 8 which were commercially available. A solution of the methylbenzoate (1 equiv) in ethanol was added dropwise to 65% hydrazinemonohydrate (5 equiv). The reaction mixture was then heatedunder reflux and stirred overnight. The reaction progress was followedup by TLC. Crude product was collected by filtration aftercooling of the reaction medium and finally washed with coldethanol unless specified otherwise. The desired benzohydrazides were used without any further purification.The analysis of spectral data (1H and 13C NMR), the yields, HRMS,Mp and Rf of these precursors are presented in SupplementaryInformation.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Methyl 2-methoxybenzoate, and friends who are interested can also refer to it.

Reference:
Article; Ameryckx, Alice; Thabault, Leopold; Pochet, Lionel; Leimanis, Serge; Poupaert, Jacques H.; Wouters, Johan; Joris, Bernard; Van Bambeke, Francoise; Frederick, Raphael; European Journal of Medicinal Chemistry; vol. 159; (2018); p. 324 – 338;,
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Adding a certain compound to certain chemical reactions, such as: 99548-55-7, name is Methyl 4-bromo-2-methylbenzoate, 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 99548-55-7, Computed Properties of C9H9BrO2

General procedure: A mixture of methyl 5-fluoro-2-methylbenzoate (0.5 g, 3.0 mmol),NBS (0.18 g, 3.0 mmol), and di-benzoyl peroxide (BPO) (36 mg, 0.15 mmol) in 1,2-dichloroethane (5 mL) was heated at 80 C for 12 huntil all starting material was consumed. The reaction was cooled to room temperature, and the precipitated solid was removed by filtration and washed with ethers (10 mL). The filtrate was concentrated in vacuo and the residue was partitioned between 2 N NaHCO3 (15 mL) and ethers (15 mL). The organic layer was separated, dried over MgSO4, filtered and concentrated to give a crude product (0.65 g, 89%), which was used in the next step reaction without further purification.

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 4-bromo-2-methylbenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Huang, Junli; Deng, Xiaoyan; Zhou, Siru; Wang, Na; Qin, Yujun; Meng, Liuwei; Li, Guobao; Xiong, Yuhua; Fan, Yating; Guo, Ling; Lan, Danni; Xing, Junhao; Jiang, Weizhe; Li, Qing; Bioorganic and Medicinal Chemistry; vol. 27; 4; (2019); p. 644 – 654;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Adding a certain compound to certain chemical reactions, such as: 2967-93-3, name is Methyl 2-fluoro-5-methylbenzoate, 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 2967-93-3, Recommanded Product: 2967-93-3

The 2-fluoro-5-methyl benzoic acid methyl ester (100 mg, 0 . 60mmol), NBS (112 mg, 0 . 63mmol), AIBN (60 mg, 0 . 36mmol) is added in the reaction bottle, by adding CCl4(5 ml), Ar atmosphere reflow 3h, raw material a small amount of residual, reducing pressure and evaporating solvent, adding anhydrous ethyl ether (10 ml), vacuum filtration, filtrate turns on lathe does, column chromatography, to obtain 20 mg of white solid, yield 13.5%.

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-fluoro-5-methylbenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Institute Of Materia Medica Chinese Academy Of Medical Sciences; Xu, Bailing; Chen, Xiaoguang; Yao, Haiping; Ji, Ming; Jin, Jing; Zhou, Jie; Wang, Ke; Zhao, Dalong; (55 pag.)CN105461697; (2016); A;,
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Reference of 217314-47-1, 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. 217314-47-1, name is Methyl 3-amino-5-methoxybenzoate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

(i) Methyl 3-((4-((4-((tert-butoxycarbonvnamino)naphthalen-1-yl)oxy)pyridin-2-yl)amino)-5-methoxybenzoateA flask charged with tert-butyl (4-((2-chloropyridin-4-yl)oxy)naphthalen-1-yl)carbamate (see Example 2(ii) above; 20.1 g, 54.2 mmol), methyl 3-amino-5-methoxybenzoate (10.80 g, 59.6 mmol), BrettPhos G1 Precatalyst (550 mg, 0.689 mmol) and K2C03(14.98 g, 108 mmol) in anhydrous tBuOH (300 ml.) was back filled with nitrogen (x3) and then placed on a heating block (preheated to 90C). The suspension was degassed with nitrogen, stirred for 8 h and then cooled to rt and stirred for 8 h. Reaction mixture was warmed to 50C then cooled to rt and diluted with DCM (1 L), the suspension was filtered through Celite and the solvent evaporated. The brown oil was sonicated with diethyl ether (500 ml.) and the solid filtered under suction, washing with further diethylether, to afford the sub-title compound (21.55 g) as a beige solid. 1H NMR (400 MHz, DMSO-d6) delta 9.37 (s, 1 H), 9.19 (s, 1 H), 8.15 (s, 1 H), 8.13 (s, 1 H), 7.85 (dd, 1 H), 7.76 (dd, 1 H), 7.69 (dd, 1 H), 7.66-7.54 (m, 3H), 7.37 (d, 1 H), 6.96 (dd, 1 H), 6.62 (dd, 1 H), 6.09 (d, 1 H), 3.82 (s, 3H), 3.75 (s, 3H), 1.53 (s, 9H). (90% purity). LCMS m/z 516 (M+H)+(ES+); 514 (M-H)”(ES”)

The synthetic route of Methyl 3-amino-5-methoxybenzoate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; RESPIVERT LIMITED; TOPIVERT PHARMA LIMITED; FYFE, Matthew Colin Thor; THOM, Stephen Malcolm; BAKER, Thomas Matthew; HARBOTTLE, Gareth William; HASIMBEGOVIC, Vedran; RIGBY, Aaron; WO2015/92423; (2015); A1;,
Ester – Wikipedia,
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Related Products of 54535-22-7,Some common heterocyclic compound, 54535-22-7, name is Diethyl 2-((phenylamino)methylene)malonate, molecular formula is C14H17NO4, 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: A diphenyl ether solution of 2e-k (4 mmol) containingcatalytic 2-chlorobenzoic acid was heated by microwaveirradiation (250 C) for 1-2 h. After cooling, the reactionmixture was filtered and the precipitate 3e-k was washedwith n-hexane and water. Ethyl 4-oxo-1,4-dihydroquinoline-3-carboxylate (3e) Starting from 2e (5 g); Yield (cream powder): 3 g (75 %); m.p. 261-262 C; IR (KBr) numax 1400-1600 (aromatic), 1695(carbonyl), 3150 (N-H) cm-1; LC-MS (ESI) m/z 218.1 (M+H+), 240.1 (M+Na+); Calcd. for C12H11NO3: C, 66.35; H,5.10; N, 6.45. Found: 66.47; H, 5.22; N, 6.27.

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

Reference:
Article; Hajimahdi; Zabihollahi; Aghasadeghi; Ashtiani, S. Hosseini; Zarghi; Medicinal Chemistry Research; vol. 25; 9; (2016); p. 1861 – 1876;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics