Tag: M.W=200-300

Electric Literature of 450-88-4, A common heterocyclic compound, 450-88-4, name is 1-Bromo-4-fluoro-2-methoxybenzene, molecular formula is C7H6BrFO, 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.

Intermediate Example Int10.101 -bromo-2-methoxy-4-(methy Isu Ifany l)benzeneTo a stirred solution of 1 -bromo-4-fluoro-2-methoxybenzene (4.0 g) in DMF (40 mL) was added sodium methanethiolate (2.76 g). The mixture was stirred at r.t. for 30 minutes and at 85 C for 2 h. Water was added and the mixture was extracted with ethyl acetate. The organic phase was washed with saturated sodium chloride solution, dried (sodium sulfate) and the solvent was removed in vacuum. Silica gel chromatography gave 280 mg of the title compound.1H-NMR (400MHz, DMSO-d6): delta [ppm]= 2.46 (s, 3H), 3.82 (s, 3H), 6.74 (dd, 1 H), 6.91 (d, 1 H), 7.44 (d, 1 H). 1 -bromo-2-methoxy-4-(methy Isu Ifany l)benzene To a stirred solution of 1 -bromo-4-fluoro-2-methoxybenzene (10.0 g) in DMF (100 mL) was added sodium methanethiolate (4.44 g). The mixture was stirred at 65C for 2 h. The mixture was cooled to 0 C and methyl iodide (4.55 mL) was added. The mixture was stirred at r.t. for 1 h and further sodium methanethiolate (4.44 g) was added. The mixture was stirred at 65C for 1 h. The mixture was cooled to 0 C and methyl iodide (4.55 mL) was added. The mixture was stirred at r.t. for 1 h. Water was added and the mixture was extracted with ethyl acetate. The organic phase was washed with saturated sodium chloride solution, dried (sodium sulfate) and the solvent was removed in vacuum. Silica gel chromatography gave 6.2 g of the title compound as a 2: 1 mixture with the starting material. The mixture was used for the next step without purification.

The synthetic route of 450-88-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BAYER INTELLECTUAL PROPERTY GMBH; SCHULZE, Volker; KOSEMUND, Dirk; WENGNER, Antje, Margret; SIEMEISTER, Gerhard; STOeCKIGT, Detlef; LIENAU, Philip; SCHIROK, Hartmut; BRIEM, Hans; WO2012/143329; (2012); 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. 458-50-4, name is 4-Bromo-3-fluoroanisole, A new synthetic method of this compound is introduced below., Safety of 4-Bromo-3-fluoroanisole

Step 2: 9-(2-Fluoro-4-methoxy-phenyl)-bicyclo[3.3.1]nonan-9-oll-Bromo-2-fluoro-4-methoxy-benzene (4.10 g, 20 mmol) was dissolved in THF (30 ml) and cooled to -78°C. To the solution was added n-BuLi (1.6 M in THF, 12.5 ml, 20 mmol) dropwise. The reaction mixture was stirred at -78°C for 20 min, after which bicyclo[3.3.1]nonan-9-one (2.76 g, 20 mmol) in THF (20 ml) was added dropwise. The reaction mixture was stirred at -78°C for 2.5 hours and quenched at the same temperature with aqueous NH4C1 solution. Water and EtOAc were added. The reaction mixture was extracted with EtOAc three times. The organic phase was washed with brine and dried (Na2S04). Silica gel chromatography (EtO Ac/heptane) provided 3.4 g of the title compound.Ci6H2iF02 (264.15), LCMS (EI+): 264.14 (M+).1H NMR (CDCI3, 300MHz), delta 7.41 (t, 1H), 6.55-6.71 (m, 2H), 3.80 (s, 3H), 2.61 (br. s, 1H), 2.39 (m, 2H), 1.49-2.17 (m, 12H).

The synthetic route of 458-50-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SANOFI-AVENTIS; KOSLEY, Raymond Walter, Jr.; SHER, Rosy; NEUENSCHWANDER, Kent W.; GURUNIAN, Vieroslava; WO2011/34832; (2011); A1;,
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112970-44-2, name is 2-Bromo-3-methoxyaniline, belongs to ethers-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: C7H8BrNO

35% HCl (3 mL) and ice (3 g) were added to 2-bromo-3-methoxyphenylamine (0.83 g, 4.11 mmol) obtainedin Step A, and cooled to 0-5C. NaNO2 (0.31 g, 4.52 mmol)/H2O (2 mL) solution was slowly added thereto, and themixture was stirred at 0-5C for 20 minutes. Pre-prepared KI (6.82 g, 41.1 mmol)/H2O (10 mL) solution was slowly addeddropwise to the reaction solution, and the reaction was carried out at room temperature for 12 hours. After terminationof the reaction, NaOH solution was added thereto, and the reaction solution was extracted with DCM. The organic layerwas washed with saturated NaHCO3 aqueous solution and water. The extracted organic layer was concentrated underreduced pressure and purified by column chromatography (eluent, EtOAc/Hex = 1/10) to obtain the title compound (0.88g, 68 %).1H NMR (500 MHz, CDCl3) delta 7.48(d, 1H), 7.00(dd, 1H), 6.85(d, 1H), 3.87(s, 3H)

The synthetic route of 112970-44-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; LG Chem, Ltd.; KIM, Young Kwan; PARK, Sang Yun; JOO, Hyun Woo; CHOI, Eun Sil; PAEK, Seung Yup; KANG, Seung Wan; KIM, Byung Gyu; LEE, Chang Seok; KIM, Sung Wook; LEE, Sang Dae; (369 pag.)EP3239143; (2017); A2;,
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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. 101-55-3, name is 1-Bromo-4-phenoxybenzene, A new synthetic method of this compound is introduced below., HPLC of Formula: C12H9BrO

[00432] In a reaction tube under nitrogen, a mixture of PdCl2(dppf)CH2Cl2 (22 mg; 0.027 mmol) and triethylamine (0.36 ml; 2.58 mmol) in dioxane (4 ml; dried over 4 ? sieves) was sealed and stirred at 80 C. overnight (18 h). After cooling to room temperature, HB(pin) (0.19 ml;, 1.31 mmol) and 4-bromodiphenyl ether (216 mg; 0.865 mmol) were added and the reaction mixture was stirred at 80 C. GC analysis after 18 h showed a peak at 13.84 mins which was identified by GC/MS as the desired compound.

The synthetic route of 101-55-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Commonwealth Scientific and Industrial Research Organisation; US6680401; (2004); B1;,
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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. 35896-58-3, name is 1,2,3,4-Tetramethoxy-5-methylbenzene, A new synthetic method of this compound is introduced below., SDS of cas: 35896-58-3

General procedure: A solution of compounds 1, 4, 5 (2.5 mmol) in THF (10 mL) was diluted with water (5 mL), and an excess solution of cerricammonium nitrate (CAN) (3.9 g, 7 mmol) in 10 mL water was added at 0 C. The mixture was stirred at room temperature for 2 h. The progress of the reaction was monitored by TLC. After completion of the reaction, the THF was removed under a vacuum at 40 C, and the crude mixture was extracted with three portions of CH2Cl2 (20 mL). The orange extracts were washed with brine until neutrality, then dried over anhydrous Na2SO4 and concentrated in vacuo. The crude products were purified by a silica-gel column chromatography with petroleum ether and EtOAc as eluent to give the desired benzoquinones 2, 7, 6.

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; Wang, Jin; Li, Shuo; Yang, Tao; Yang, Jian; European Journal of Medicinal Chemistry; vol. 86; (2014); p. 710 – 713;,
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Synthetic Route of 29578-39-0, A common heterocyclic compound, 29578-39-0, name is 1-Bromo-3-fluoro-5-methoxybenzene, molecular formula is C7H6BrFO, 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.

Step 1: Preparation of 8-(3-fluoro-5-methoxy-phenyl)-1,4-dioxa-8-azaspiro[4.5]decane A mixture of 3-bromo-5-fluoroanisole (87.6 g, 0.49 mol), 1,4-dioxa-8-azaspiro[4.5]decane hydrochloride (100.0 g, 0.49 mol), t-BuONa (117.2 g, 1.22 mol), BINAP (12.1 g, 0.02 mol) and Pd2(dba)3 (8.9 g, 0.01 mol) in toluene (1.3 L) was heated at 100 oC with stirring under nitrogen for 16 hrs. The reaction mixture was cooled down to rt and filtered. The filtrate was diluted with DCM (3.0 L), and washed with H2O (500 mL) and brine (200 mL). The organic layer was dried over anhydrous Na2SO4, concentrated in vacuo and purified by the flash column chromatography to give 8-(3-fluoro-5-methoxy-phenyl)-1,4-dioxa-8-azaspiro[4.5]decane (78.2 g) as a yellow oil.

The synthetic route of 29578-39-0 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; CHENG, Zhanling; HAN, Xingchun; JIANG, Min; WANG, Jianhua; WANG, Min; WANG, Yongguang; YANG, Song; (319 pag.)WO2016/177655; (2016); A1;,
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Application of 5905-69-1, 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. 5905-69-1, name is 1-Bromo-4-(difluoromethoxy)benzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Bromo-4-(difluoromethoxy)benzene 6 (2.23 g, 10 mmol), potassium acetate (30.0 mmol), 4,4,5,5-tetramethyl-2-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)-l,3,2-dioxaborolane (11.0 mmol) and Pd(PPh3)4 (0.5 mmol) are added to a 40-mL Schlenk flask equipped with a stir bar. The flask is evacuated and backfilled with nitrogen several times. 1,4-Dioxane (10 mL) is added by syringe. The Schlenk flask is sealed and heated at 1500C for 20 min in a microwave oven. After the reaction is complete, the solvent is removed under vacuum. The residue is dissolved in DCM (200 mL) and washed with water. The organic phase is dried with anhydrous Na2SO4, filtered and concentrated to yield a crude product. Purification by silica gel column chromatography (EtOAc : hexanes, gradient from 0% to 20%) affords 2-(4- (difluoromethoxy)phenyl)-4,4,5,5-tetramethyl-l,3,2-dioxaborolane 7. 1H NMR (400MHz, CDCl3) delta 7.74 (d, J = 8.4 Hz, 2H), 7.02 (d, J = 8.4 Hz, 2H), 6.48 (t, J = 73.6 Hz, IH), 1.27 (s, 12H). MS (m/z) (M+l)+: 271.1.

The synthetic route of 1-Bromo-4-(difluoromethoxy)benzene has been constantly updated, and we look forward to future research findings.

Reference:
Patent; IRM LLC; WO2009/26276; (2009); A1;,
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Some common heterocyclic compound, 175278-17-8, name is 2-Bromo-4-(trifluoromethoxy)aniline, molecular formula is C7H5BrF3NO, 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. Computed Properties of C7H5BrF3NO

To a cooled (0C) solution of phosgene (20% solution in toluene, 2.76 ml, 5.52 MMOL) in dry DICHLOROMETHANE (75 ml) was added, under an argon atmosphere, methyl 4-amino-2- methoxybenzoate (1 G, 5.52 MMOL) in one portion, followed by a dropwise addition of diisopropylethylamine (1.92 ML, 11.04 MMOL). The mixture was stirred for 15 minutes at 0C prior to the addition of 2-bromo-4 (trifluoromethoxy) aniline (0.83 ML, 5.52 MMOL). The reaction mixture was stirred at 0C for a further 2 hours and then was allowed to stir at room temperature overnight. The organic phase was washed with 1 N aq. HCI (2x), sat. aq. NAHCO3, dried over MGS04 and concentrated in vacuo to give a solid residue which was recrystallized in hot acetonitrile. The fine crystalline solid was filtered off, washed with cold acetonitrile and dried in vacuo to give the title compound Ex 106 as a pale-orange solid (1. 64G, 3.54 mmol, 64%). ‘H-NMR (DMSO-d6) : 6 3.74 (s, 3H), 3.80 (s, 3H), 7.02 (d, 1H), 7.38 (s, 1H), 7.42 (d, 1H), 7.69 (d, 1H), 7.74 (s, 1H), 8.17 (d, 1H), 8.36 (s, 1H), 9.85 (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 175278-17-8, its application will become more common.

Reference:
Patent; 7TM PHARMA A/S; LITTLE, Paul Brian; WO2004/48319; (2004); A1;,
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Electric Literature of 63057-72-7,Some common heterocyclic compound, 63057-72-7, name is 1-(Benzyloxy)-4-bromo-2-methoxybenzene, molecular formula is C14H13BrO2, 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.

1 -(benzyloxy)-4-bromo-2- methoxybenzene (18.2 g, 62 mmol) was suspended in 162 mL methanol and 18 mL water. N- Iodosuccinimide (18. lg, 81 mmol) and trifluoroacetic acid (3.8 mL, 50 mmol) were added sequentially. The mixture was warmed to 35 C and stirred for 7 hours in the dark. Water (54 mL) was added dropwise over 15 minutes, then the mixture was allowed to cool slowly to room temperature while stirring overnight. The crystalline product was filtered, and rinsed with a 6:4 mixture of methanol: water (2 x 20 mL). The solids were dried in vacuo at 50 C to provide 1- (benzyloxy)-4-bromo-5-iodo-2-methoxybenzene. 1H NMR (400 MHz, Chloroform-d) delta 7.45 – 7.32 (m, 5H), 7.29 (s, 1H), 7.10 (s, 1H), 5.07 (s, 2H), 3.84 (s, 3H). MS (m/z) 419.8 [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 1-(Benzyloxy)-4-bromo-2-methoxybenzene, its application will become more common.

Reference:
Patent; GILEAD SCIENCES, INC.; AKTOUDIANAKIS, Evangelos; CANALES, Eda; CURRIE, Kevin S.; KATO, Darryl; LI, Jiayao; LINK, John O.; METOBO, Samuel E.; SAITO, Roland D.; SCHROEDER, Scott D.; SHAPIRO, Nathan; TSE, Winston C.; WU, Qiaoyin; (262 pag.)WO2018/144605; (2018); A1;,
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Related Products of 589-10-6, These common heterocyclic compound, 589-10-6, name is (2-Bromoethoxy)benzene, 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 stirred solution of 1-(2-pyridyl)-b-carboline (0.245 g,1 mmol) in 10 mL DMF, sodium hydride (50% in mineral oil, 0.048 g,1 mmol) and bromo-hydrocarbon (1 mmol) was added. The reactionmixturewas stirred at room temperature for 1 h. After reactionwas finished, the mixture was poured into ice water and extractedwith ethyl acetate. The organic layer was washed with water anddried. Removal of the solvent gave the crude product that waspurified by silica gel column (dichloromethane: methanol 100:1 as the eluent). The solvent was removed and the product wasobtained.

Statistics shows that (2-Bromoethoxy)benzene is playing an increasingly important role. we look forward to future research findings about 589-10-6.

Reference:
Article; Lu, Xing; Liu, Yan-Cheng; Orvig; Liang, Hong; Chen, Zhen-Feng; European Journal of Medicinal Chemistry; vol. 181; (2019);,
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