Day: November 4, 2020

As a common heterocyclic compound, it belongs to benzoxazole compound, name is Benzo[d]oxazole-2-thiol, and cas is 2382-96-9, its synthesis route is as follows.,2382-96-9

Example 2 (Compound No. 8 in Table) Production of 9-(benzoxazol-2-ylthio)-N-(2-methylthio-3-pyridyl)nonanamide: The reaction and the treatment were conducted in the same manner as in Example 1 except that 9-bromononanoyl chloride was used instead of 6-bromohexanoyl chloride to obtain 9-bromo-N-(2-methylthio-3-pyridyl)nonanamide. To a DMF (5 ml) solution of this amide (90 mg, 0.25 mmol) and 2-mercaptobenzoxazole (38 mg, 0.25 mmol) were added potassium carbonate (42 mg, 0.30 mmol) and 18-crown-6 (7 mg, 0.03 mmol), and the mixture was stirred at 80C for 3 hours. The reaction mixture was allowed to cool, and then extracted with ethyl acetate. The organic layer was washed with water and then with a saturated aqueous solution of sodium chloride, and dried over sodium sulfate. Subsequently, the solvent was distilled off, and the resulting residue was recrystallized from a mixture of ethyl acetate-hexane to obtain 83 mg (yield 77%) of the desired compound as a colorless powdery crystal. Melting point: 84 – 85C IR (KBr) cm-1:3465, 3276, 2926, 1664, 1505.

With the complex challenges of chemical substances, we look forward to future research findings about Benzo[d]oxazole-2-thiol

Reference£º
Patent; KOWA COMPANY LTD.; EP979823; (2000); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

As a common heterocyclic compound, it belongs to quinuclidine compound,Quinuclidine-4-carboxylic acid hydrochloride,40117-63-3,Molecular formula: C8H14ClNO464,mainly used in chemical industry, its synthesis route is as follows.,19932-85-5

General procedure: Heteroarylboronic acid (1.3 equivalents), aryl bromide (1 equivalent), and tetrakis(triphenylphosphine) palladium(0) (5mol %) were suspended in DME to give a 0.07-0.1M solution of boronic acid under nitrogen atmosphere. A 0.5M aqueous solution of sodium carbonate (6 equivalents) was added. The mixture was refluxed for 3.5-14h, cooled to room temperature, diluted with water and extracted several times with ethyl acetate. The combined extracts were dried over anhydrous MgSO4, concentrated and purified by flash chromatography and were if necessary recrystallized.

With the synthetic route has been constantly updated, we look forward to future research findings about 6-Bromobenzo[d]oxazol-2(3H)-one,belong benzoxazole compound

Reference£º
Article; Grombein, Cornelia M.; Hu, Qingzhong; Rau, Sabrina; Zimmer, Christina; Hartmann, Rolf W.; European Journal of Medicinal Chemistry; vol. 90; (2015); p. 788 – 796;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

7-Aminobenzo[d]oxazol-2(3H)-one, cas is 81282-60-2, it is a common heterocyclic compound, the benzoxazole compound, its synthesis route is as follows.,81282-60-2

Example 57: 2-(4-(trifluoromethyl)phenyl)-N-(2,3-dihydro-2-oxobenzo[d]oxazol-7-yl)acetamide (scheme 10) Preparation of 2-(4-(trifluoromethyl)phenyl)-N-(2,3-dihydro-2-oxobenzo[d]oxazol-7-yl)acetamide 4-trifluoromethylphenylacetic acid (453 mg, 2.2 mmol) was dissolved in 20 ml of THF and at 0C DEPC (0.43 ml, 1.3equiv) and amine 1c (400 mg, 2.66 mmol) were added to the solution. The mixture was warmed at 80C overnight, then evaporated and the crude was dissolved in AcOEt (30 ml) and washed with water (1 X 20 ml) and brine. The organic phase was dried over sodium sulfate and concentrated under vacuum. The purification of the crude residue by chromatographic column using AcOEt 3 /petroleum ether 7 as eluant gave 340 mg of a white solid. Yield = 46% 1HNMR (DMSO, 200 MHz) delta 3.86 (2H, s), 6.86 (1H, d), 7.06 (1H, t), 7.58 (3H, m), 7.70 (2H, d, J = 8.4 Hz), 10.32 (1H, bs), 8.73 (1H, bs), 11.80 (1H, bs); [M+1] 337.2 (C16H11F3N2O3 requires 336.3).

As the rapid development of chemical substances, we look forward to future research findings about 81282-60-2

Reference£º
Patent; Pharmeste S.r.l.; EP2377850; (2011); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

Name is 2-Methylbenzo[d]oxazol-6-amine, as a common heterocyclic compound, it belongs to benzoxazole compound, and cas is 5676-60-8, its synthesis route is as follows.,5676-60-8

To a solution of 2, 5-dichlorobenzenesulphonyl chloride (174 mg, 0.709 MMOL) in dichloromethane (3 mL) was added pyridine (140 pL, 1.72 MMOL) and the mixture was stirred under N2 for 5 min, after which time 6-AMINO-2-METHYLBENZOXAZOLE (100 mg, 0.675 MMOL) was added. The resulting mixture was stirred for 1 h at room temperature, then saturated NAHCO3 solution was added (8 mL) and the mixture was extracted into ethyl acetate (15 mL). The organic phase was washed with brine, dried (NA2SO4), filtered and evaporated to give a residue that was purified using flash chromatography to afford a white solid (154 mg, 64%), single spot at Rf 0.50 (60: 40 hexane: ethyl acetate). mp 167.0-167. 3C, HPLC purity 97% (tR 1.97 min in 10% WATER-ACETONITRILE).’H NMR (CDCI3) : 6 7.93 (1H, d, J=2.3 Hz), 7.47 (1H, d, J=8.6 Hz), 7.46-7. 40 (4H, m), 7.00 (1H, dd, J=8.6, 2.0 Hz), 2.61 (3H, s). LCMS: 355.07 (M-). FAB-MS (MH+, C14H10CI2N203S) : calcd 356.9867, found 356.9875.

With the complex challenges of chemical substances, we look forward to future research findings about 2-Methylbenzo[d]oxazol-6-amine

Reference£º
Patent; STERIX LIMITED; WO2004/37251; (2004); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

2382-96-9, Benzo[d]oxazole-2-thiol is a benzoxazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: 0.005 g Fe3O4-AMPD-Pd was added to a mixture including1 mmol thiol, 0.4 mL H2O2 33% and free solvent were stirred atroom temperature. The reaction was followed by TLC after completion.The nanocatalyst was isolated by a simple magnet., 2382-96-9

2382-96-9 Benzo[d]oxazole-2-thiol 712377, abenzoxazole compound, is more and more widely used in various fields.

Reference£º
Article; Tamoradi, Taiebeh; Moeini, Nazanin; Ghadermazi, Mohammad; Ghorbani-Choghamarani, Arash; Polyhedron; vol. 153; (2018); p. 104 – 109;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

Benzo[d]oxazol-2-amine, cas is 4570-41-6, it is a common heterocyclic compound, the benzoxazole compound, its synthesis route is as follows.,4570-41-6

Example 6 N-Benzooxazol-2-yl-3-cyclopentyl-2-(3,4-dichloro-phenyl)-propionamide A solution of triphenylphosphine (274 mg, 1.04 mmol) in methylene chloride (6 mL) was cooled to 0¡ã C. and then treated with N-bromosuccinimide (211 mg, 1.18 mmol). The resulting brownish-purple mixture was stirred at 0¡ã C. for 5 min until the reaction mixture became homogeneous. The reaction mixture was then treated with 3-cyclopentyl-2-(3,4-dichloro-phenyl)-propionic acid (prepared as in Example 1, 200 mg, 0.70 mmol). The reaction mixture was stirred at 0¡ã C. for 20 min and then allowed to warm to 25¡ã C. where it was stirred for 30 min. The reaction mixture was then treated with 2-aminobenzoxazole (140 mg, 1.04 mmol) and pyridine (0.17 mL, 2.09 mmol), and the reaction mixture was allowed to stir at 25¡ã C. for 20 h. The resulting reaction mixture was diluted with water (15 mL) and then extracted with methylene chloride (3*15 mL). The combined organic layers were dried over sodium sulfate, filtered, and concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 80/20 hexanes/ethyl acetate) afforded N-benzooxazol-2-yl-3-cyclopentyl-2-(3,4-dichloro-phenyl)-propionamide (214 mg, 76percent) as a light yellow foam: EI-HRMS m/e calcd for C21H20Cl2N2O2 (M+) 402.0902, found 402.0908.

With the rapid development of chemical substances, we look forward to future research findings about Benzo[d]oxazol-2-amine

Reference£º
Patent; Corbett, Wendy Lea; Grimsby, Joseph Samuel; Haynes, Nancy-Ellen; Kester, Robert Francis; Mahaney, Paige Erin; Sarabu, Ramakanth; US2002/103199; (2002); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

5-Chlorobenzo[d]oxazole-2(3H)-thione, cas is 22876-19-3, it is a common heterocyclic compound, the benzoxazole compound, its synthesis route is as follows.,22876-19-3

Step 6) Synthesis of 2, 5-dichlorobenzo [d] oxazoleA mixture of 5-chlorobenzo [d] oxazole-2-thiol (3.01 g, 16.22 mmol) , sulfoxide chloride (20 mL, 272.6 mmol) and N, N-dimethylformamide (0.10 mL, 1.3 mmol) was heated to reflux and stirred for 3 hours The reaction mixture was cooled and the solvent was removed in vacuo. The resulting product was used directly in the next step.

With the synthetic route has been constantly updated, we look forward to future research findings about 5-Chlorobenzo[d]oxazole-2(3H)-thione,belong benzoxazole compound

Reference£º
Patent; SUNSHINE LAKE PHARMA CO., LTD.; ZHANG, Yingjun; JIN, Chuanfei; ZHANG, Ji; (90 pag.)WO2017/88759; (2017); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

5-Chlorobenzo[d]oxazole-2(3H)-thione, cas is 22876-19-3, it is a common heterocyclic compound, the benzoxazole compound, its synthesis route is as follows.,22876-19-3

Step 4b. A mixture of compound from step 4a (1.6 g, 8.6 mmol), Mel (1.8 g, 12.9 mmol) and K2CO3 in DMF (20 mL) was stirred for 5 hours at 50C before was partitioned (EtO Ac-brine). The organic was dried (Na2S04), filtered and concentrated to give the desired compound (1.2 g, 70%) as a yellow oil. ESI-MS m/z =199.90, 201.90 [M+H]+. This material was used directly in the next step without further purification.

With the rapid development of chemical substances, we look forward to future research findings about 5-Chlorobenzo[d]oxazole-2(3H)-thione

Reference£º
Patent; ENANTA PHARMACEUTICALS, INC.; QIU, Yao-ling; LI, Wei; CAO, Hui; JIN, Meizhong; GAO, Xuri; PENG, Xiaowen; KASS, Jorden; OR, Yat, Sun; (84 pag.)WO2016/183266; (2016); 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

Intermediate 33: Synthesis of 3-methyl-2-oxo-2,3-dihydrobenzo[d]oxazoIe-6-sulfonyl chloride.NaH , MeI HSOXI 1. Synthesis of 3-methylbenzo[dloxazol-2 (3H)-one.Sodium hydride (7.00 mmol) was added to a chilled (0 C) solution of benzo[d]oxazol- 2(3H)-one (4.81 mmol) in tetrahydrofuran (20 mL) and the reaction mixture was maintained for 30 min. Methyl iodide (7.25 mmol) was added dropwise and the reaction mixture was maintained for 6 h at rt. The reaction mixture was diluted with with ethanol (10 mL) and the mixture was concentrated. The residue was diluted with water (50 mL) and was extracted with dichloromethane (3 x 20 mL). The combined organic layers were dried (sodium sulfate), filtered and concentrated to afford 3-methylbenzo[d]oxazol-2 (3H)-one in 82% yield as a light red solid, 59-49-4

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

Reference£º
Patent; MEMORY PHARMACEUTICALS CORPORATION; SCHUMACHER, Richard, A.; TEHIM, Ashok; XIE, Wenge; WO2010/24980; (2010); 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

K2CO3(9.2 g, 66.6 mmol) and 1,4-dibromobutane (21.0 mL, 177.6 mmol) were added, under stirring, to a solution of benzo[d]oxazol-2(3H)-one (3.0 g, 22.2 mmol) in anhydrous DMF (30 mL). The reaction mixture was heated at 60 C for 3 h. After cooling, the reaction mixture was poured into 100 mL water and extracted with ethyl acetate (3 x 70 mL). The combined organic layers were washed with saturated aqueous NaCl and dried over sodium sulfate. The solvent was removed in vacuo, and the residue was purified by flash column chromatography (SiO2) using hexane/ethyl acetate (8:2) as eluent to give 3.6 g (62%) of 2e as a white solid., 59-49-4

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

Reference£º
Article; Abdelazeem, Ahmed H.; Khan, Shabana I.; White, Stephen W.; Sufka, Kenneth J.; McCurdy, Christopher R.; Bioorganic and Medicinal Chemistry; vol. 23; 13; (2015); p. 3248 – 3259;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem