Brief introduction of 28281-76-7

As the paragraph descriping shows that 28281-76-7 is playing an increasingly important role.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.28281-76-7,5-Methoxyisobenzofuran-1,3-dione,as a common compound, the synthetic route is as follows.

28281-76-7, Triphenylphosphine (1.3 g, 5.1 mmol) was dissolved in 6 ml of THF, which was cooled down to 0 C. under nitrogen gas. THF (5.0 ml) solution containing CBr4 (0.84 g, 2.5 mmol) dissolved therein was added thereto, followed by stirring until the color of the solution turned yellow. After the color change, TEA (0.91 ml, 5.1 mmol) was added drop by drop for 5 minutes, to which THF (1 ml) solution containing the compound prepared in step 4 above (0.15 g, 0.85 mmol) dissolved therein was added gradually. The reaction solution was stirred at 0 C. for 30 minutes. Then, the temperature of the reaction solution was adjusted to room temperature, followed by stirring for overnight. The reaction was quenched with a saturated NH4Cl aqueous solution. When the phases were separated, the water layer was extracted by using hexane. The combined organic layer was concentrated under reduced pressure. The obtained residue was dissolved in ethoxyethane and filtered through a celite pad. The obtained solution was concentrated by rotary evaporation and purified by flash column chromatography. As a result, a target compound was obtained (0.077 g, 27%). NMR graphs of the obtained target compound are shown in . The upper graph of is a graph showing the results of 1H NMR of Example 7, and the lower graph of is a graph showing the results of 13C NMR of Example 7. 1H NMR (DMSO-d6, 500 MHz) delta 7.91 (d, J=8.5 Hz, 1H), 7.76 (s, 1H), 7.32 (d, J=7.0 Hz, 1H), 3.93 (s, 3H). 13C NMR (DMSO-d6, 125 MHz) delta 165.0, 163.5, 145.1, 138.2, 127.9, 118.2, 117.5, 108.2, 77.4, 56.2.

As the paragraph descriping shows that 28281-76-7 is playing an increasingly important role.

Reference£º
Patent; SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION; Kim, Byeong Moon; Choi, Bong Kyu; Sim, Jae Hyun; Ryu, Eun Ju; Park, Ji Su; Bae, Il Hak; (54 pag.)US2019/345126; (2019); A1;,
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Downstream synthetic route of 4265-25-2

4265-25-2, The synthetic route of 4265-25-2 has been constantly updated, and we look forward to future research findings.

4265-25-2, 2-Methylbenzofuran is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

2-Methylbenzofuran (400 mg, 3.03 mmol) was dissolved in tetrahydrofuran (15 mL), cooled to -78C, and lithium diisopropylamide (2 M tetrahydrofuran solution, 1.7 mL, 3.33 mmol) was added dropwise. The reaction solution was stirred at -78C for 1 hour, and 1-bromo-3-chloropropane (525 mg, 3.33 mmol) was added and the mixture was stirred at -78C for another 2 hours. The reaction was quenched by the addition of saturated ammonium chloride solution (30 mL). The mixture was extracted with ethyl acetate (30 mL x 2). The organic phases were combined, washed with brine (20 mL), dried over anhydrous sodium sulfate, filtered and the filtrate was concentrated under reduced pressure to give 2-(4-chlorobutyl)benzofuran (500 mg, as ayellow oil). MS-ESI M + H]+ calcd. 209, found 209.

4265-25-2, The synthetic route of 4265-25-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GUANGDONG ZHONGSHENG PHARMACEUTICAL CO., LTD; WU, Lingyun; CHEN, Xiaoxin; ZHANG, Peng; LIU, Xing; ZHANG, Li; LIU, Zhuowei; CHEN, Shuhui; LONG, Chaofeng; (160 pag.)EP3299371; (2018); A1;,
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Brief introduction of 271-89-6

As the paragraph descriping shows that 271-89-6 is playing an increasingly important role.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.271-89-6,Benzofuran,as a common compound, the synthetic route is as follows.

General procedure: To a solution of anisole 3A (3.0 mmol, 324.4 mg) in THF (3.0 mL) was added n-BuLi (4.5 mmol,1.55 M in hexane, 2.87 mL) at 0 C. The mixture was stirred for 2 h at 0 C under an argon atmosphere. Then, pivalonitrile (9.0 mmol, 748.2 mg) in THF (2.0 mL) was added to the mixture at 0 C and the obtained mixture was stirred for 30 min in the temperature range of 0 C to room temperature. MeOH (2.0 mL) was added to the mixture. Then, I2 (12.0 mmol, 3045.6 mg) and K2CO3 (12.0 mmol, 1658.4 mg) were added to the mixture at room temperature, and the obtained mixture was stirred for 6 h at 70 C. Sat. aq. Na2SO3 solution (20.0 mL) was added to the reaction mixture, and the product was extracted with AcOEt (10.0 mL x 3). The organic layer was dried over Na2SO4. After filtration and removal of the solvent, the residue was purified by silica-gel column chromatography (chloroform: n-hexane 1:1) to give 2-methoxybenzonitrile 2A (315.6 mg, 79%)., 271-89-6

As the paragraph descriping shows that 271-89-6 is playing an increasingly important role.

Reference£º
Article; Uchida, Ko; Togo, Hideo; Tetrahedron; vol. 75; 39; (2019);,
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Downstream synthetic route of 64169-34-2

The synthetic route of 64169-34-2 has been constantly updated, and we look forward to future research findings.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.64169-34-2,5-Bromoisobenzofuran-1(3H)-one,as a common compound, the synthetic route is as follows.

Method 0 : 4-bromo-2- (hydroxymethyl) -N- (2,2,2- trifluoroethyl) benzamide; [00134] To a stirred suspension of aluminium trichloride (4.07 g, 30.5 mmol) in dichloroethane (60 ml) cooled to 5C under a nitrogen atmosphere was added the solution of trifluoroethylamine (5.84 g, 38.7 mmol) at such a rate to keep the temperature of the reaction mixture below 100C. After complete addition the reaction mixture was allowed to warm up to room temperature and stirred at this temperature for 4 hours. After this time bromophthalide powder (5 g, 23.5 mmol) was added in one portion and the reaction mixture was then heated to 800C for 18 hours. TLC showed complete conversion from starting material to product and the reaction was carefully quenched with iced water (100 ml) and stirred for 30 minutes until all the ice melted. Dichloromethane was added and the mixture was filtered through a pad of silica and washed with copious amounts of DCM to remove the aluminium residues. The filtrate was separated and the aqueous layer was further extracted with DCM (2 x 100 ml) . The organic layers were combined and dried over magnesium sulfate, filtered and concentrated under reduced pressure to afford the title compound as an off-white powder (3.37 g, 46% yield) . 1H NMR (DMSO D6, 400 MHz) 4.02-4.11 (2H, m) , 4.60-4.61 (2H, m) , 5.43- 5.46 (H, m) , 7.36-7.39 (H, d) , 7.55-7.57 (H, m) , 7.76 (H, s) and 9.09-9.12 (H, m) ; MS (ES+) 312, (ES”) 310., 64169-34-2

The synthetic route of 64169-34-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; VERTEX PHARMACEUTICALS INCORPORATED; WO2008/128009; (2008); A2;,
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Brief introduction of 123654-26-2

123654-26-2, The synthetic route of 123654-26-2 has been constantly updated, and we look forward to future research findings.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.123654-26-2,4-Amino-5-chloro-2,3-dihydrobenzofuran-7-carboxylic acid,as a common compound, the synthetic route is as follows.

a) A mixture of 4-amino-5-chloro-2,3-dihydro-7-benzofurancarboxylic acid (4.3 g) in thionyl chloride (100 ml) and CHCl3 (200 ml) was stirred and refluxed for 2 hours. The mixture was cooled and the solvent was evaporated. Toluene was added and evaporated again, yielding 4.8 g of 4-amino-5-chloro-2,3-dihydro-7-benzofurancarbonyl chloride (100% crude residue) (intermediate 7).

123654-26-2, The synthetic route of 123654-26-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Janssen Pharmaceutica, N.V.; US5872131; (1999); A;,
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Downstream synthetic route of 37418-88-5

37418-88-5 4-Hydroxyisobenzofuran-1,3-dione 96580, abenzofuran compound, is more and more widely used in various fields.

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.37418-88-5,4-Hydroxyisobenzofuran-1,3-dione,as a common compound, the synthetic route is as follows.

EXAMPLE 1 Synthesis of (3’R,4’S,5’R)-6″-chloro-4′-(3-chloro-2-fluorophenyl)-N-(4-((4-(2-((2-(2,6- dioxopiperidin-3-yl)-l,3-dioxoisoindolin-4-yl)oxy)acetamido)butyl)carbamoyl)phenyl)- 2″-oxodispiro[cyclohexane-l,2′-pyrrolidine-3′,3″-indoline]-5′-carboxamide Ste 1 : Synthesis of S 1 To a round-bottom flask, 3-hydroxyphthalic anhydride (1 g, 6.09 mmol) and 3-aminoperidine-2,6-dione hydrochloride (1.0 g, 6.09 mmol) were mixed in 50 mL of toluene. Triethyl amine (0.93 mL, 6.7 mmol) was added. The resulting reaction mixture was heated to reflux for 12 h with Dean-Stark Trap equipment. After cooling to ambient temperature, evaporation of most of the solvent to give a crude product, which was purified by flash column chromatography with DCM:EA to get the desired product as a slightly yellow solid S I (1.5g, 90% yield). 1H NMR (400 MHz, DMSO-d6) delta (ppm) 11.16 (s, 1H), 11.08 (s, 1H), 7.65 (t, = 7.6 Hz, 1H), 7.32 (d, = 7.2 Hz, 1H), 7.25 (d, = 8.4 Hz, 1H), 5.07 (dd, = 12.8 Hz, = 5.2 Hz, 1H), 2.93-2.84 (m, 1H), 2.61-2.46 (m, 1H), 2.05-2.01 (m, 1H)., 37418-88-5

37418-88-5 4-Hydroxyisobenzofuran-1,3-dione 96580, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; THE REGENTS OF THE UNIVERSITY OF MICHIGAN; WANG, Shaomeng; LI, Yangbing; AGUILAR, Angelo; ZHOU, Bing; HU, Jiantao; XU, Fuming; QIN, Chong; HU, Yang; XIANG, Weiguo; REJ, Rohan; YANG, Jiuling; HAN, Xin; BAI, Longchuan; YANG, Chao-Yie; (252 pag.)WO2017/176958; (2017); A1;,
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Simple exploration of 550998-59-9

The synthetic route of 550998-59-9 has been constantly updated, and we look forward to future research findings.

550998-59-9, 7-Bromobenzofuran-2-carboxylic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

550998-59-9, 4.0 g [(16.] 59 mmol) [7-BROMBENZOFURAN-2-CARBONSaeURE] (Beispiel 29A), 3.3 g (16.59 mmol) [(S)-3-AMINOCHINUKLIDIN-DIHYDROCHLORID,] 7.57 g (19.91 mmol) HATU, 10.41 mL (59.74 mmol) N, N-Diisopropylethylamin und [21] mL DMF werden gemaess der allgemeinen Arbeitsvorschrift C umgesetzt. Das Solvens wird unter reduziertem Druck entfernt, das Rohprodukt in 100 mL Essigsaeureethylester aufgenommen und 15-mal mit insgesamt 1.5 L 1 N Natronlauge gewaschen. Die organische Phase wird ueber Magnesiumsulfat getrocknet und vom Solvens befreit. Es werden 5.0 g [(85] % d. Th. ) der Titelverbindung isoliert. Die analytischen Daten stimmen mit denen aus Beispiel 30A ueberein. [alpha20 D] =-28. [0] (c = 0.1, Methanol).

The synthetic route of 550998-59-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; BAYER HEALTHCARE AG; WO2003/104227; (2003); A1;,
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Brief introduction of 23681-89-2

The synthetic route of 23681-89-2 has been constantly updated, and we look forward to future research findings.

23681-89-2, 2,3-Dihydrobenzofuran-6-ol is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: NaH (12.0mmol) was added to a solution of 1 or 722 (1.88g, 10.0mmol) and substituted phenol (12.0mmol) in DMF (50mL) at room temperature under N2, and the mixture was stirred at 80¡ãC for 10h. Water was added to the cooled mixture, and the mixture was extracted with EtOAc several times. The combined organic layers were washed with water, dried over anhydrous Na2SO4, and concentrated under reduced pressure. The crude residue was purified by silica gel column chromatography to obtain purified compound 2, or crude 2 was used directly for the next reaction without further purification., 23681-89-2

The synthetic route of 23681-89-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Shinozuka, Tsuyoshi; Tsukada, Tomoharu; Fujii, Kunihiko; Tokumaru, Eri; Shimada, Kousei; Onishi, Yoshiyuki; Matsui, Yumi; Wakimoto, Satoko; Kuroha, Masanori; Ogata, Tsuneaki; Araki, Kazushi; Ohsumi, Jun; Sawamura, Ryoko; Watanabe, Nobuaki; Yamamoto, Hideki; Fujimoto, Kazunori; Tani, Yoshiro; Mori, Makoto; Tanaka, Jun; Bioorganic and Medicinal Chemistry; vol. 26; 18; (2018); p. 5099 – 5117;,
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Analyzing the synthesis route of 77095-51-3

77095-51-3 Benzofuran-6-carboxylic acid 17867234, abenzofuran compound, is more and more widely used in various fields.

77095-51-3, Benzofuran-6-carboxylic acid is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

77095-51-3, Benzofuran-6-carboxylic acid (compound of formula VI, 2.0 gm), N,N- Dimethylformamide (20 mL) and Triethylamine (3.74 gm) were charged into a 2000 mL RBF and the mixture was cooled to 10 C. HATU (5.63 gm) was charged into the mass and stirred for 30 minutes. Added above aqueous layer containing compound of formula II at 20 C and stirred for 1 hour. 1N aqueous hydrochloric acid (100 mL) was added and stirred for 10 minutes. Gummy solid was formed. The aqueous layer was decanted. Sodium carbonate solution (100 mL) and ethylacetate (60 mL) were added to the gummy mass and stirred for 30 minutes. Layers separated and the aqueous layer was washed with ethylacetate (60 mL). The aqueous layer was acidified with 1 N aqueous hydrochloric acid (100 mL) and stirred for 30 minutes. The precipitation was faltered and the wet solid was washed with water (20 mL). The solid was dried under vacuum at 50 C for 3 hours to yield 1 .5 gm of Lifitegrast. Purity: 94.85% by HPLC.

77095-51-3 Benzofuran-6-carboxylic acid 17867234, abenzofuran compound, is more and more widely used in various fields.

Reference£º
Patent; DR. REDDY’S LABORATORIES LIMITED; ACHANTA, Srinivas; CHAKKA, Ramesh; DAHANUKAR, Vilas Hareshwar; CHANDRASEKHAR, Elati Ravi Rama; BHIMAVARAPU, Srinivasa Reddy; MADARABOINA, Mahendar; (35 pag.)WO2019/26014; (2019); A1;,
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Some tips on 6940-49-4

As the paragraph descriping shows that 6940-49-4 is playing an increasingly important role.

6940-49-4, 3-Bromophthalide is a benzofuran compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: Isobenzofuran-1(3H)-one (0.4 mmol), KOH (0.4 mmol), PhSiH3 (1.2 mmol), dried THF (2 mL) were charged in a Schlenk tube(15 mL) under N2 atmosphere. The mixture was refluxed for 4 h. After cooling to rt, the reaction was quenched with EtOH(0.5-1 mL). Solvent was removed under reduced pressure and the crude residue was purified by column chromatography on silica gel with petroleum ether-ethyl acetate as the eluent to afford the desired product., 6940-49-4

As the paragraph descriping shows that 6940-49-4 is playing an increasingly important role.

Reference£º
Article; Liu, Bin; Zhou, Xigeng; Chinese Chemical Letters; vol. 30; 3; (2019); p. 725 – 728;,
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