Author: Jessica.F

Electric Literature 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;,
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Synthetic Route of 13831-03-3, A common heterocyclic compound, 13831-03-3, name is tert-Butyl propiolate, molecular formula is C7H10O2, 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: Preparation of Copper Acetylides; Procedure 1To a solution of CuI (3.8 g, 20.0 mmol) in a mixture of NH4OH(28% NH3 solution, 50 mL) and EtOH (30 mL) was added the alkyne1 (10.0 mmol) dropwise. The deep blue reaction mixture wasstirred overnight at r.t. under argon and the yellow precipitate wascollected by filtration and successively washed with NH4OH (10%NH3 solution, 3 × 50 mL), H2O (3 × 50 mL), EtOH (3 × 50 mL), andEt2O (3 × 50 mL). The bright yellow solid was then dried under highvacuum overnight to afford the desired polymeric copper acetylide2, which was used without further purification.

The synthetic route of 13831-03-3 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Theunissen, Cedric; Lecomte, Morgan; Jouvin, Kevin; Laouiti, Anouar; Guissart, Celine; Heimburger, Jeremy; Loire, Estelle; Evano, Gwilherm; Synthesis; vol. 46; 9; (2014); p. 1157 – 1166;,
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Application of 10601-80-6, 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 10601-80-6 as follows.

General procedure: A mixture of Yb(OTf)3 (2.5 mol%), amine (1.0 eq.), ethyl 3,3-diethoxypropionate (2.5 eq.) and aldehyde (1.1 eq.) in 1,4-dioxane (1.5 mL / 1 eq.) was stirred at 90 C for 6-17 h. After the reaction, the resulting mixture was washed with PBS buffer solution (25 mL) and extracted with CH2Cl2 (15 mL×3). The organic layer was dried over MgSO4. Removal of the solvent in vacuo, followed by chromatography on silica gel column (AcOEt/Hexane or CHCl3/MeOH), afforded dihydropyridine 4.

According to the analysis of related databases, 10601-80-6, the application of this compound in the production field has become more and more popular.

Reference:
Article; Sueki, Shunsuke; Takei, Ryo; Abe, Junya; Shimizu, Isao; Tetrahedron Letters; vol. 52; 34; (2011); p. 4473 – 4477;,
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Application of 349-43-9,Some common heterocyclic compound, 349-43-9, name is Ethyl 2-fluoropropionate, molecular formula is C5H9FO2, 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.

Syntheses of the intermediate sulfinamide esters A3.3 and A3.4A3.3 A3.4 In a dry apparatus under an inert atmosphere a solution of diisopropylamine (3.35 g, 101 mmol) in tetrahydrofuran (25 ml) was treated with n-butyl lithium (1.6M in hexane, 20.7 ml). The solution was stirred at -7 °C for 40 minutes. Thereafter, the solution was cooled to -75 °C and a solution of ethyl 2-fluoropropanoate (3.98 g, 33.2 mmol) in tetrahydrofuran (5 ml) was added dropwise. After 40 minutes a solution of chlorotitanium triisopropoxide (8.64 g, 33.2 mmol) in tetrahydrofuran (15 ml) was slowly added dropwise. After 40 minutes at -72 °C to the orange colored solution was added dropwise a solution of (R)-2-methyl-propane-2-sulfinic acid [l-(2-fluorophenyl)-(E)-ethylidene] -amide (intermediate A2.1) (4.0 g, 16.6 mmol) in tetrahydrofuran (5 ml). Stirring was continued at -72 °C for 4 hours, then the reaction mixture was kept at -20 °C for 17 hours. For the workup, the reaction mixture was quenched with an aqueous solution of ammonium chloride (13percent, 100 ml). The precipitate formed was diluted with water and the resulting mixture extracted three times with ethyl acetate. The organic layers were washed with brine, then combined, dried and evaporated at reduced pressure. Purification of the crude product by chromatography on silica gel using a 5:2-mixture auf heptane and ethyl acetate as the eluent yielded a l :2-mixture of the (2S,3R)-2-fluoro-3-(2-fluoro-phenyl)-2-methyl-3- ((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.3) and (2R,3R)-2-Fluoro-3- (2-fluoro-phenyl)-2-methyl-3-((R)-2-methyl-propane-2-sulfinylamino)-butyric acid ethyl ester (A3.4) (4.43 g, 74percent) as a light yellow oil. MS (ISP): m/z = 362.2 [M+H]+.

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

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; SIENA BIOTECH S.P.A; HILPERT, Hans; WOSTL, Wolfgang; WO2012/139993; (2012); A1;,
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Some common heterocyclic compound, 3697-68-5, name is Ethyl 1-(hydroxymethyl)cyclopropanecarboxylate, molecular formula is C7H12O3, 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: C7H12O3

[0373] To a stirring ice-cooling solution of compound 72(200 mg, 1.39 mmol) and triethylamine (280 mg, 2.77 mmol)in DCM (10 ml), was added methanesulfonyl chloride (190mg, 1.66 mmol, dissolve in 1 ml DCM) dropwise. The reactionmixture was stirred 1 hat oo C., then diluted with DCM(20 ml), the organic phase was washed with water and brine,dried over Na2S04 , filtered and concentrated to afford crudecompound 73 (300 mg, yield 97%) as a colorless oil, useddirectly in the next step without further purification.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3697-68-5, its application will become more common.

Reference:
Patent; Gao, Daxin; Yang, Heping; Yu, Yajun; US2014/329800; (2014); A1;,
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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. 625-56-9, name is Chloromethyl acetate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Quality Control of Chloromethyl acetate

To a suspension of 3- (3, 5-dimethyl-IH-pyrrol-2-ylmethylene)-1, 3-dihydro-indol-2-one (2. 02 g, 8.5 mmoles) and Cs2C03 (11.05 g, 34 mmoles) in CH3CN (200 mL) was added acetic acid chloromethyl ester (3.3 mL, 34 mmoles). The reaction mixture was heated at 40C and left under stirring overnight. The reaction evolution was followed by LC/MS. The mixture was then concentrated in vacuo together with silica gel. The residue was purified by chromatography using a gradient of petroleum ether/ethyl acetate from 85: 15 to 50: 50, furnishing the title compound (488 mg, 19% yield) as a deep orange solid. 1H-NMR (DMSO-d6, Z isomer) 8 13.01 (s, lH), 7.81 (d, lH), 7.65 (s, lH), 7.26-7. 05 (m, 3H), 6.07 (d, lH), 5.89 (s, 2H), 2.35 (s, 3H), 2.33 (s, 3H), 2.04 (s, 3H).

The synthetic route of 625-56-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; LEO PHARMA A/S; WO2005/58309; (2005); A1;,
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Synthetic Route of 10259-22-0,Some common heterocyclic compound, 10259-22-0, name is Ethyl 3-methoxybenzoate, molecular formula is C10H12O3, 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 stirred solution of 1a (0.15 g, 1.0 mmol) in THF (8 mL) at -78 C was added n-BuLi (1.6 M in hexane; 2.0 mmol) dropwise.The temperature was gradually raised to 0 C and stirring was continued for 1.5 h. The mixture was cooled again to -78 C and ethyl benzoate (0.15 g, 1.0 mmol) was added dropwise. After the temperature was gradually raised to 0 C, saturated aqueous NH4Cl (20 mL) was added and the mixture was extracted with AcOEt (3 × 15 mL). The combined extracts were washed with brine (20 mL), dried (Na2SO4), and concentrated by evaporation. The residue was purified by column chromatography on SiO2(AcOEt/hexane 1:5) to afford 3a (0.16 g, 63%); a yellow solid

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

Reference:
Article; Kobayashi, Kazuhiro; Fujiwara, Daiki; Nozaki, Kazuma; Nogi, Takashi; Heterocycles; vol. 96; 9; (2018); p. 1610 – 1621;,
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Some common heterocyclic compound, 3697-68-5, name is Ethyl 1-(hydroxymethyl)cyclopropanecarboxylate, molecular formula is C7H12O3, 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. Application In Synthesis of Ethyl 1-(hydroxymethyl)cyclopropanecarboxylate

In a three-necked flask fitted with thermometer, dropping funnel and gas exhaust, 7.39 g (58.19 mmol) of oxalyl chloride were initially charged in 116 ml of abs. dichloromethane at -78 C. 9.08 g (116.38 mmol) of dimethyl sulphoxide, dissolved in 8 ml of abs. dichloromethane, were then slowly added dropwise (careful: intensive evolution of gas), with the internal temperature being kept between -70 C. and -78 C. The reaction mixture was stirred at -78 C. for another 5 min 7.63 g (52.90 mmol) of ethyl 1-(hydroxymethyl)cyclopropanecarboxylate (described in M. H. Parker et al. U.S. Pat. Appl. Publ., 20120053146), dissolved in 196 ml of abs. dichloromethane, were then slowly added dropwise, with the internal temperature being kept between -70 C. and -78 C. The reaction mixture was stirred at -78 C. for another 10 min 26.72 g (264.51 mmol) of triethylamine were then slowly added dropwise, with the internal temperature being kept between -70 C. and -78 C. The reaction mixture was stirred at -78 C. for another 10 min and then warmed to RT over 2 h. The mixture was diluted with 700 ml of methyl tert-butyl ether, the precipitate was filtered off and the filtrate was concentrated at 30 C. and 100 mbar. The residue was purified by flash chromatography (mobile phase: dichloromethane). This gave 7.30 g (97% of theory, purity about 95% according to NMR) of the title compound. (0307) 1H NMR (500 MHz, CDCl3): delta [ppm]=1.32 (t, 3H), 1.58-1.63 (m, 2H), 1.65-1.70 (m, 2H), 4.28 (q, 2H), 10.41 (s, 1H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3697-68-5, its application will become more common.

Reference:
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; VAKALOPOULOS, Alexandros; GROMOV, Alexey; FOLLMANN, Markus; BROCKSCHNIEDER, Damian; STASCH, Johannes-Peter; MARQUARDT, Tobias; TERSTEEGEN, Adrian; WUNDER, Frank; REDLICH, Gorden; LANG, Dieter; LI, Volkhart Min-Jian; (46 pag.)US2016/145271; (2016); A1;,
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Reference of 83881-47-4, These common heterocyclic compound, 83881-47-4, name is Methyl 2-(2-chloroethoxy)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.

Alkylation of 2-Fluoro-5-nitro-phenylamine with (2-Chloro-ethoxy)-acetic acid methyl ester in an inert solvent in the presence of base will give [2-(2-Fluoro-5-nitro-phenylamino)-ethoxy]-acetic acid methyl ester.

The synthetic route of 83881-47-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Drug Innovation & Design, Inc.; US2003/138432; (2003); A1;,
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Related Products of 110661-91-1, 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. 110661-91-1, name is tert-Butyl 4-bromobutanoate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Example 15 Synthetic Scheme A: Compounds 305, 298, 299, 300, 301, 302, and 303 tert-Butyl 4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)butanoate (1). To a mixture of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (209.12 mg, 0.95 mmol) and tert-butyl 4-bromobutanoate (212 mg, 0.95 mmol) in N,N-Dimethylformamide (2 mL) was added Cs2CO3 (402.47 mg, 1.24 mmol). Reaction mixture was heated at 65 C. for 12 hours (overnight) . By TLC small amounts of starting material (Hex:AcOEt, 7:3). Crude product was purified by flash CC (SiO2-25 g, Hex:AcOEt, gradient 9:1 to 4:6) to give 198 mg (57% yield) of product as an oil: 1H NMR (500 MHz, DMSO-d6) delta 7.59 (d, J=8.2 Hz, 2H), 6.91 (d, J=7.9 Hz, 2H), 3.99 (t, J=6.3 Hz, 2H), 2.35 (t, J=7.3 Hz, 2H), 1.92 (p, J=6.7 Hz, 2H), 1.39 (s, 9H), 1.27 (s, 12H). 13C NMR (101 MHz, dmso) delta 172.25, 161.56, 136.66, 114.37, 83.77, 80.12, 66.81, 31.72, 28.20, 25.12, 24.71. LC-MS (ESI); m/z [M+Na]+: Calcd. for C20H31BO5Na, 385.2162. Found 385.2194.

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 4-bromobutanoate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Arvinas, Inc.; Yale University; Crew, Andrew P.; Hornberger, Keith R.; Wang, Jing; Dong, Hanqing; Qian, Yimin; Crews, Craig M.; Jaime-Figueroa, Saul; (628 pag.)US2018/179183; (2018); A1;,
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