Tag: M.W:100-200

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.136992-95-5,Benzo[d]oxazol-7-amine,as a common compound, the synthetic route is as follows.

General procedure: 6-Bromo-4-chloroquinoline (1.0 equiv.) and 3,4,5-trimethoxyaniline (1.1 equiv.) were suspended in ethanol (10 mL) and refluxed for 18 h. The crude mixture was purified by flash chromatography using EtOAc:hexane followed by 1-5% methanol in EtOAc, solvent was removed under reduced pressure to afford the desired product (1, 8-11, 13-31, and 33-43)., 136992-95-5

As the paragraph descriping shows that 136992-95-5 is playing an increasingly important role.

Reference£º
Article; Asquith, Christopher R.M.; Bennett, James M.; Su, Lianyong; Laitinen, Tuomo; Elkins, Jonathan M.; Pickett, Julie E.; Wells, Carrow I.; Li, Zengbiao; Willson, Timothy M.; Zuercher, William J.; Molecules; vol. 24; 22; (2019);,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

2-Benzoxazolinone, cas is 59-49-4, it is a common heterocyclic compound, the benzoxazole compound, its synthesis route is as follows.,59-49-4

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).

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

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

5676-60-8, 2-Methylbenzo[d]oxazol-6-amine is a benzoxazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,5676-60-8

2-Chloro-4-chlorocarbonylquinoline (0.5 g), prepared by standard methods from 2-chloroquinoline-4-carboxylic acid, was added to sodium azide in aqueous dioxan (2.1 ml 1:3) at 0 C. Acetone was then added and the mixture stirred for 16 h. Water (10 ml) was added, the precipitated solid collected by filtration and air dried to give 2-chloroquinoline-4-carbonyl azide (0.455 g). The azide (0.232 g) in toluene (10 ml) was warmed from room temperature to 75 C. and then heating continued for 1 h. After cooling to room temperature 6-amino-2-methylbenzoxazole (0.148 g) in dichloromethane (15 ml) containing 4-N,N-dimethylaminopyridine (20 mg) was added and the mixture stirred for 16 h. The precipitated solid was separated by filtration to give a solid (0.25 g). Column chromatography (silica gel, dichloromethane/methanol/ammonia mixtures) gave the title compound (0.072 g). 1H NMR delta: 5 2.60 (3H, s), 7.25 (1H, d, J=8.5 Hz), 7.61 (1H, d, J=8.5 Hz), 7.73 (1H, t, J=7.0 Hz), 7.84 (1H, t, J=6.7 Hz), 7.91 (1H, d, J=8.0 Hz), 8.05 (1H, s), 8.20 (1H, d, J=8.25 Hz), 8.28 (1H, s), 9.49 (1H, s), 9.61 (1H, s). m/z (API+): 353, 355(MH+).

5676-60-8 2-Methylbenzo[d]oxazol-6-amine 590539, abenzoxazole compound, is more and more widely used in various fields.

Reference£º
Patent; SmithKline Beecham p.l.c.; US6699879; (2004); B1;,
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: A mixture of 2-mercaptobenzoxazole (2a, X = O), 2-mercaptobenzthiazole (2b,X = S) (10 mmol), 2-chloroacetic acid (10 mmol), K2CO3 (10 mmol), DMF (10 mL),and TBAB as a PTC was stirred for 1-2 h at r.t. After completion of reaction, the mixturewas cooled to r.t. and treated with acetic acid until neutralized. The separated solid wasfiltered, washed with water (2 ¡Á 40 mL), and dried to obtain crude 3a,b. The latter onrecrystallization from suitable solvent gave pure 3a,b., 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; Rafeeq, Mohammad; Ramana Reddy, Chittireddy Venkata; Dubey, Pramod Kumar; Phosphorus, Sulfur and Silicon and the Related Elements; vol. 190; 11; (2015); p. 1857 – 1864;,
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

3H-1,3-Benzoxazol-2-one (5.00?g, 37.00?mmol) was dissolved in acetic acid (50?mL) and bromine (1.9?mL, 37.0?mmol) was added dropwise. The reaction mixture was stirred at 20?C for 4?h.The reaction mixture was poured onto ice and the precipitate was collected by filtration, washed with water and air-dried to give a pink powder (7.48?g, 34.8?mmol, 94%). Mp 191.6-192.3?C. 1H NMR (300?MHz, DMSOd6): delta 11.81 (s, 1H), 7.57 (dd, J?=?1.9?Hz, J?=?0.3?Hz, 1H), 7.30 (dd, J?=?8.3?Hz, J?=?1.9?Hz, 1H), 7.04 (dd, J?=?8.3?Hz, J?=?0.3?Hz, 1H). 13C NMR (75?MHz, DMSOd6): delta 154.5, 144.5, 130.3, 126.9, 113.5, 113.2, 111.7. LCMS m/z calc for [M?-?H]+: 211.9, 213.9, found: 211.8, 213.8., 59-49-4

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

Reference£º
Article; Gay, Marion; Evrard, Caroline; Descamps, Florian; Carato, Pascal; Renault, Nicolas; Coevoet, Mathilde; Eddarkaoui, Sabiha; Baud, Catherine; Larchanche, Paul-Emmanuel; Buee, Luc; El Bakali, Jamal; Vingtdeux, Valerie; Sergeant, Nicolas; Melnyk, Patricia; European Journal of Medicinal Chemistry; vol. 159; (2018); p. 104 – 125;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.22876-19-3,5-Chlorobenzo[d]oxazole-2(3H)-thione,as a common compound, the synthetic route is as follows.

General procedure: Commercially available 5-chloro-2-mercapto benzoxazole or benzothiazole (10 mmol) and K2CO3 (15mmol) were added to 50 mL of acetone. After 10 min, appropriate 1-bromo–bromoalkane (12 mmol) was added and the mixture was stirred at room temperature for 24 h. After this time the suspension was filtered from inorganic material and the solvent was evaporated under reduced pressure. The residue was suspended in water and extracted with diethyl ether (3 ¡Á 50 mL). The combined extracts were washed with water, dried over anhydrous Na2SO4, and evaporated under reduced pressure to givein termediates 9-12 that were used without further purification for the final step. For analytical purpose,a little amount was purified by means of flash chromatography, using cyclohexane/ethyl acetate 9.5:0.5v/v as eluent. Analytical and spectral data are reported for novel compounds 9-12, 22876-19-3

22876-19-3 5-Chlorobenzo[d]oxazole-2(3H)-thione 708870, abenzoxazole compound, is more and more widely used in various fields.

Reference£º
Article; Romeo, Giuseppe; Prezzavento, Orazio; Intagliata, Sebastiano; Pittala, Valeria; Modica, Maria N.; Marrazzo, Agostino; Turnaturi, Rita; Parenti, Carmela; Chiechio, Santina; Arena, Emanuela; Campisi, Agata; Sposito, Giovanni; Salerno, Loredana; European Journal of Medicinal Chemistry; vol. 174; (2019); p. 226 – 235;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

2-Benzoxazolinone, cas is 59-49-4, it is a common heterocyclic compound, the benzoxazole compound, its synthesis route is as follows.,59-49-4

A reactor was charged with l,3-benzoxazol-2(3H)-one (309 mg) and a 2.5M solution of sodium hydroxide (1.5 g) in water (15 ml). The reactor heated to 100 C and held for 16 hours. The reaction mixture was cooled to ambient temperature then acidified to pH 1 with concentrated hydrochloric acid. The organics were then extracted with ethyl acetate (20 ml). The aqueous phase was basified with 10% aqueous sodium bicarbonate solution to pH 9 and then the organics were extracted with ethyl acetate (3 x 20 ml). The combined organic phase was dried (MgS04), filtered and reduced to an oil by rotary evaporation. This was purified by flash chromatography, eluting with n-hexane and ethyl acetate.Appropriate fractions were collected for the product peak and were reduced by rotary evaporation to obtain the desired product as orange oil (180 mg, 72%). The structure was confirmed as 2-aminophenol by 1H NMR

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

Reference£º
Patent; NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO; CROCKATT, Marc; URBANUS, Jan Harm; KONST, Paul Mathijs; DE KONING, Martijn Constantijn; (58 pag.)WO2016/114668; (2016); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

81900-93-8,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.81900-93-8,4-Aminobenzo[d]oxazol-2(3H)-one,as a common compound, the synthetic route is as follows.

Amine 2d (362 mg, 3.8 mmol) (Scheme 7) was dissolved in 20 ml of AcOEt and at 0C triphosgene (1.12 g, l equiv.) was added to the solution. The mixture was warmed at 80C for 4 hours then evaporated and the residue was dissolved in 5 ml of DMF. The solution of the isocyanate was added dropwise to a solution in DMF (10 ml) of compound lb (384 mg, 2.56 mmol) and the mixture was warmed at 80C for 8 hours. (TLC AcOEt). The solvent was 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 gave 200 mg of a pale rose solid. Yield = 18% ‘HNMR (DMSO, 400 MHz) delta 2.91 (4H, m), 3.76 (4H, m), 4.46 (2H, d, J = 5.6 Hz), 6.97 (3H, m), 7.05 (1H, m), 7.36 (1H, s), 7.46 (1H, d), 7.54 (1H, d), 8.53 (1H, s), 1 1.00 (1H, bs); [M+1] 437.1 (C2oH19F3N4O4 requires 436.4).

81900-93-8 4-Aminobenzo[d]oxazol-2(3H)-one 19982202, abenzoxazole compound, is more and more widely used in various fields.

Reference£º
Patent; PHARMESTE S.R.L.; NAPOLETANO, Mauro; TREVISANI, Marcello; PAVANI, Maria Giovanna; FRUTTAROLO, Francesca; WO2011/120604; (2011); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

701-16-6,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.

[0552] To a stirred solution of Comp-48e (0.27 g, 1.32 mmol) and Comp-50c (0.2 g, 1.32 mmol) in THF:t-BuOH (5 mL 4:1) was added f-BuOK (0.15 g, 1.32 mmol) at 0 C and the reaction mixture was stirred at RT for 2 h. Progress of the reaction was monitored by TLC and LCMS. After completion, the reaction mixture was poured on crushed ice and extracted with EtOAc (30 mL X 2). The combined organic layer was washed with brine, dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude compound was purified by column chromatography (silica, 100-200 mesh, 30-40% EtOAc in hexane) to afford (E)-5-fluoro-2-(2-(5-methyl-l-(l-methylpiperidin-4-yl)-lH-pyrazol-4- yl)vinyl)benzo[d]oxazole (78, 0.07 g, 15%) as pale yellow solid. (0972) [0553] HPLC purity : 99.89% (0973) [0554] MS (ESI) m/e [M+H]+/Rt %: 341.15/1.22/99.6% (0974) [0555] 1H NMR (400 MHz, DMSO-d6) delta 1.80 (d, .7=11.25 Hz, 2 H), 2.01 – 2.07 (m, 2 H), 2.08 – 2.17 (m, 2 H), 2.25 (s, 3H), 2.42 (s, 3 H), 2.91 (d, J=8.80 Hz, 2 H), 4.12 – 4.23 (m, 1 H), 6.91 (d, J=16.14 Hz, 1 H), 7.17-7.23 (m, 1 H), 7.54 (dd, J=9.05, 2.69 Hz, 1 H), 7.64 (d, J=16.14 Hz, 1 H), 7.69 (dd, J=8.80, 4.40 Hz, 1 H), 8.05 (s, 1 H).

As the paragraph descriping shows that 701-16-6 is playing an increasingly important role.

Reference£º
Patent; ALPINE ANDROSCIENCES, INC.; PATIL, Santhosh N.; SARMA, Bugga VNBS; (148 pag.)WO2019/152731; (2019); 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

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., 2382-96-9

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

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