Month: October 2020

A common heterocyclic compound, the benzoxazole compound, name is 5-Bromobenzo[d]oxazole,cas is 132244-31-6, mainly used in chemical industry, its synthesis route is as follows.,132244-31-6

In the reaction flask, Under argon, a catalyst (9.9 mg, 0.025 mmol, 5 mol%), potassium tert-butoxide (0.0672 g, 0.6 mmol) DMF (3.0 ml), 5-bromobenzoxazole (99.01 mg, 0.5 mmol) was added to the carbon dioxide gas, and the reaction was stirred at 80 C for 18 hours under normal pressure. Cooled to 65 C, methyl iodide (93 mul, 1.5 mmol) was added, The reaction was stirred at 65 C for 1 hour. Cooled to room temperature, the reaction was terminated with deionized water, The reaction product was extracted with ethyl acetate and purified by column chromatography (Using a mixed solvent of ethyl acetate / petroleum ether in a volume ratio of 1:10 as a developing solvent) The yield was 85%.

As the rapid development of chemical substances, we look forward to future research findings about 132244-31-6

Reference£º
Patent; Soochow University (Suzhou); Sun Hongmei; Liu Ling; Zhu Fan; Zhou Qiaoyun; (10 pag.)CN106565623; (2017); A;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.59-49-4,2-Benzoxazolinone,as a common compound, the synthetic route is as follows.

To a mixture of 3H-benzooxazol-2-one (20 g, 0.15 mol) in DCM (500 mL) was added bromine (8.34 mL, 0.16 mol). After stirring at room temperature for 19.5 h, the orange precipitate that had formed was filtered off and washed with DCM until the orange color was washed out. The filtrate was concentrated to approximately 33% of its original volume and filtered and washed as before. The combined solids weighed 28.36 g. 1H NMR indicated the product was clean albeit contained ca. 8-9% starting material meaning the true yield of product was 26.72 g, 84%., 59-49-4

The synthetic route of 59-49-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AVENTIS PHARMACEUTICALS INC.; US2008/138413; (2008); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

59-49-4, 2-Benzoxazolinone is a benzoxazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

40.0 g (0.30 mol) of 2-benzoxazolinone were dissolved with stirring at room temperature in 600.0 ml (0.30 mole) of 68% nitric acid. It was then heated to 50 C. and stirred at this temperature for three hours. The reaction was stirred for a further 16 h at room temperature. After completion of the reaction, the mixture was poured into about 2.0 l of ice water, precipitated substance was filtered off, washed neutral and dried. After drying, 6-nitro-3H-1,3-benzoxazol-2-one (39.1 g, 72%) was obtained as a pale yellow solid. 1H-NMR (300 MHz, d6-DMSO): delta=7.25 (d, 1H, 4-H), 8.10 (d, 1H, 5-H), 8.17 (s, 1H, 7-H), 12.43 (br s, 1H, NH)., 59-49-4

The synthetic route of 59-49-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Henkel AG & Co. KGaA; Gebert-Schwarzwaelder, Antje; Nemitz, Ralph; Kroos, Astrid; Koenen, Annika; (20 pag.)US2019/167551; (2019); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

A common heterocyclic compound, the benzoxazole compound, name is 2-Benzoxazolinone,cas is 59-49-4, mainly used in chemical industry, its synthesis route is as follows.,59-49-4

To a mixture of 3H-benzooxazol-2-one (20 g, 0.15 mol) in DCM (500 mL) was added bromine (8.34 mL, 0.16 mol). After stirring at room temperature for 19.5 h, the orange precipitate that had formed was filtered off and washed with DCM until the orange color was washed out. The filtrate was concentrated to approximately 33% of its original volume and filtered and washed as before. The combined solids weighed 28.36 g and contained ca. 8-9% starting material.

As the rapid development of chemical substances, we look forward to future research findings about 59-49-4

Reference£º
Patent; AVENTIS PHARMACEUTICALS INC.; WO2006/86705; (2006); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.19932-85-5,6-Bromobenzo[d]oxazol-2(3H)-one,as a common compound, the synthetic route is as follows.

General procedure: To a stirred solution of tert-butyl 6-nitro-2-oxo-2,3-dihydro-1H-benzo[d]imidazole-1carboxylate (CAS: 438200-95-4) (630 mg, 2.26 mmol), 2-(4-(methylsulfonyl)piperazin-1-ylethanol (CAS: 72388-13-7) (940 mg, 4.52 mmol) and PPh; (11186 mg, 4.52 mmol) in THF (30 mL) under Ar atmosphere at 0 C was added DEAD (984 mg, 5.65 mmol). The reaction mixture was stirred under Ar atmosphere at 50 C overnight. The reaction mixture was diluted with H2,O (50 mL) and extracted with EtOAc (3 X 50 mL). The combined organic extracts were washed with brine (SO mL), dried over anhydrous Na2SOuq,filtered and the filtrate was concentrated. The residue was purified bysilica gel chromatography (PE: EA = 1:1, v/v). The fractions were concentrated. The residue was dissolved in PE/EA(3/1, v/v, 20 mL), stirred at room temperature for 16 h, during which time white precipitate was formed. The mixture was filtered and the filter cake was collected to give intermediate 139 (1.36 g, 59% yield) as a white solid. Intermediates 212, 213, and 214 CHCI salt) were prepared respectively via an analogous reaction protocol as described for the preparation offollowing intermediates in the column ?Method used?, 19932-85-5

19932-85-5 6-Bromobenzo[d]oxazol-2(3H)-one 29859, abenzoxazole compound, is more and more widely used in various fields.

Reference£º
Patent; JANSSEN PHARMACEUTICA NV; JOHNSON & JOHNSON (CHINA) INVESTMENT LTD.; DAI, Xuedong; QUEROLLE, Olivier Alexis Georges; KROSKY, Daniel Jason; CAI, Wei; FU, Liqiang; KONG, Linglong; LIU, Yingtao; WAN, Zhao-Kui; HERKERT, Barbara; PANDE, Vineet; EDWARDS, James Patrick; PATRICK, Aaron Nathaniel; ANGIBAUD, Patrick Rene; PONCELET, Virginie Sophie; (488 pag.)WO2019/120209; (2019); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.59-49-4,2-Benzoxazolinone,as a common compound, the synthetic route is as follows.

Preparation of 6-Bromo-3H-benzoxazol-2-one. To a stirred suspension of 3H-benzoxazol-2-one (1.35 g, 10 mmol) in acetonitrile (23 ML) at -15 C. was added portionwise NBS (2.00 g, 11.0 mmol).Following complete addition of NBS the mixture was stirred at -15 to 0 C. for 3 h then allowed to warm to ambient temperature and stirred overnight.The solvent was evaporated in vacuo and the residue was partitioned between CH2Cl2/H2O precipitating the intermediate title compound, 6-bromo-3H-benzoxazol-2-one, (0.67 g, 31%) as a brown solid. 1HNMR(CDCl3) delta 7.0 (1H, d), 7.15 (1H.,d), 7.3 (1H, s), 11.9 (1H, s)., 59-49-4

As the paragraph descriping shows that 59-49-4 is playing an increasingly important role.

Reference£º
Patent; Bender, David Michael; Forman, Scott Louis; Jones, Winton Dennis; Smith, Daryl Lynn; Zarrinmayeh, Hamideh; Zimmerman, Dennis Michael; US2003/225127; (2003); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

177492-52-3, Benzo[d]oxazol-6-amine is a benzoxazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 208: Preparation of N2-(benzo[d]oxazol-6-yl)-N4-cyclopropyl-5-(trifluoromethyl) pyrimidine-2,4-diamine and 6-((4-(cyclopropylamino)-5-(trifluoromethyl)pyrimidin-2-yl) amino -2,3-dihydrobenzo[d]oxazol-2-ol2-Chloro-N-cyclopropyl-5-(trifluoromethyl)pyrimidin-4-amine (0.065 g, 0.274 mmol) and benzo[d]oxazol-6-amine (0.037 g, 0.274 mmol) were mixed in Acetic Acid (1 ml). The mixture was microwaved at 130 C for 20 minutes and then concentrated. Added acetone and fdtered the solid. 4 mg of N2-(benzo[d]oxazol-6-yl)-N4-cyclopropyl-5- (trifluoromethyl)pyrimidine-2,4-diamine and 14 mg of 6-((4-(cyclopropylamino)-5- (trifluoromethyl)pyrimidin-2-yl)amino)-2,3-dihydrobenzo[d]oxazol-2-ol were recovered after automated reverse phase chromatography (water-MeCN eluent) on the Filtrate. MS calcd for [C15H12F3N50+H]+: 336.1 1 , found 335.95. MS calcd for [Ci5Hi4F3N502+H]+: 354.12, found 353.90.

177492-52-3, As the paragraph descriping shows that 177492-52-3 is playing an increasingly important role.

Reference£º
Patent; SALK INSTITUTE FOR BIOLOGICAL STUDIES; SANFORD-BURNHAM MEDICAL RESEARCH INSTITUTE; YALE UNIVERSITY; SHAW, Reuben J.; EGAN, Daniel F.; COSFORD, Nicholas; TURK, Benjamin; VAMOS, Mitchell; PANICKAR, Dhanya Raveendra; CHUN, Matthew; SHEFFLER, Doug; (315 pag.)WO2016/33100; (2016); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2382-96-9,Benzo[d]oxazole-2-thiol,as a common compound, the synthetic route is as follows.

General procedure: To a solution of 1 mmol of thiol in acetonitrile (2mL), was added a solution of 8 mL of phosphate buffer including laccase (40 U) and 4-phenyl urazole (10 mol%). The resulting mixture was stirred under air at room temperature for the time specified. After completion of the reaction (monitored by TLC), NaOH (10%, 10 mL). The combined organic phases were dried over anhydrous Na2SO4, filtered and evaporated under reduced pressure. The crude products were purified by recrystallization or chromatography on silica gel (n-hexane/EtOAc, 5/1). All the products were known and characterized by comparison of their spectral data (1H NMR) and physical properties (melting point) with those of authentic samples., 2382-96-9

As the paragraph descriping shows that 2382-96-9 is playing an increasingly important role.

Reference£º
Article; Khaledian, Donya; Rostami, Amin; Zarei, Seyed Amir; Catalysis Communications; vol. 114; (2018); p. 75 – 78;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.701-16-6,5-Fluoro-2-methylbenzo[d]oxazole,as a common compound, the synthetic route is as follows.

701-16-6, General procedure: The SBOs were prepared by the base-catalysed condensation of the appropriate 5-halogeno-2-methylbenzoxazole with the requisite aromatic aldehyde under phase transfer conditions. In a typical experiment, equimolar quantities (5 mmol) of the starting materials were dissolved in dichloromethane (20-50 ml) in the presence of benzyltriethylammonium chloride (3 mmol) and stirred magnetically under a nitrogen atmosphere as an aqueous solution of sodium hydroxide (50%, w/v, 5 ml) was added dropwise over a period of 10 min. After being stirred for 2-36 h until analytical thin layer chromatography indicated that the reaction was complete, the mixture was diluted with water (50 ml) and the SBO was extracted with dichloromethane (3¡Á20 ml), dried (MgSO4), filtered, evaporated under reduced pressure and recrystallized from aqueous methanol or ethanol.

The synthetic route of 701-16-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Ayrton, Stephen T.; Panova, Jekaterina; Michalik, Adam R.; Martin, William H.C.; Gallagher, Richard T.; Bowen, Richard D.; International Journal of Mass Spectrometry; vol. 345-347; (2013); p. 120 – 131;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.59-49-4,2-Benzoxazolinone,as a common compound, the synthetic route is as follows.

General procedure: Nitric acid (68%, 5.30 cm3, 80 mmol) cooled to 0-5Cwas added dropwise to a solution of benzoxazolinone (10 mmol) in 20 cm3 of acetic anhydride. The mixture was stirred at 0-5C for 3 h. The precipitate was filtered, washed with cold H2O, dried, and recrystallized from suitable solvent to afford the corresponding nitrobenzoxazolones compounds 3a (67.77%) and 3b (91%)., 59-49-4

59-49-4 2-Benzoxazolinone 6043, abenzoxazole compound, is more and more widely used in various fields.

Reference£º
Article; Yahia, Wassila; Nacereddine, Abdelmalek Khorief; Seddiki, Khemissi; Liacha, Messaoud; Nippert; Revue Roumaine de Chimie; vol. 60; 9; (2015); p. 853 – 859;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem