Tag: M.W:100-200

5-Fluoro-2-methylbenzo[d]oxazole, cas is 701-16-6, it is a common heterocyclic compound, the benzoxazole compound, its synthesis 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.

With the rapid development of chemical substances, we look forward to future research findings about 5-Fluoro-2-methylbenzo[d]oxazole

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

As a common heterocyclic compound, it belong benzoxazole compound,Benzo[d]oxazole-2-thiol,2382-96-9,Molecular formula: C7H5NOS,mainly used in chemical industry, its synthesis route is as follows.,2382-96-9

General procedure: A sealed tube (90 mL) equipped with a magnetic stirring bar and an O2 balloon was charged with dichloroethane (DCE, 20 mL), thiophenol (1a, 4 mmol, 0.44 g) and TBN (0.16 mmol, 4 mol%, 19.2 mL). Then the tube was placed in an oil bath, which was preheated to 50C. The mixture was stirred for 1 h until starting material was completely consumed as monitored by GC and TLC. After removing the solvent, the residue was purified by column chromatography on silica gel to give the desired diphenyl disulfide (2a, 90%, 0.394 g) as a white solid.

With the synthetic route has been constantly updated, we look forward to future research findings about Benzo[d]oxazole-2-thiol,belong benzoxazole compound

Reference£º
Article; Yi, Shan-Li; Li, Mei-Chao; Hu, Xin-Quan; Mo, Wei-Min; Shen, Zhen-Lu; Chinese Chemical Letters; vol. 27; 9; (2016); p. 1505 – 1508;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

Name is 2-(Chloromethyl)benzo[d]oxazole, as a common heterocyclic compound, it belongs to benzoxazole compound, and cas is 41014-43-1, its synthesis route is as follows.,41014-43-1

EXAMPLE 2 3-[(2-Benzoxazolylmethyl)amino]-5-ethyl-6-methyl-2-(1H)-pyridinone A solution of 3-amino-5-ethyl-6-methyl-2-(1H)-pyridinone (152 mg,1.0 mmol), 2-chloromethyl-1,3-benzoxazole (1.07 mmol) and triethylamine (0.14 mL, 1.0 mmol) in acetonitrile (10 mmL) was stirred at reflux for 24 hrs. After concentrating under reduced pressure,the residue was flash chromatographed over silica gel. Elution with 5% MeOH- 95% CHCl3 gave 132 mg of product which was recrystallized from EtOH-water to give 95 mg of analytically pure product, mp 202-203C, with initial melting at 179 followed by resolidification, Anal. Calcd for C16H17N3O2:

With the complex challenges of chemical substances, we look forward to future research findings about 2-(Chloromethyl)benzo[d]oxazole

Reference£º
Patent; MERCK & CO. INC.; EP484071; (1992); A2;,
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

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.

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

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

As a common heterocyclic compound, it belongs to quinuclidine compound,Quinuclidine-4-carboxylic acid hydrochloride,40117-63-3,Molecular formula: C8H14ClNO49,mainly used in chemical industry, its synthesis route is as follows.,4570-41-6

Step 4:To a solution of 4-[1-carboxy-2-(4-fluoro-phenyl)-ethyl]-benzoic acid ethyl ester (650 mg, 2.05 mmol) and 2-aminobenzoxazole (290 mg, 2.16 mmol) in CH2Cl2 (25 mL) was added DMAP (75 mg, 0.615 mmol) and EDC.HCl (472 mg, 2.46 mmol).The reaction mixture was stirred at room temperature overnight and then concentrated in vacuo.Purification by chromatography (silica, 20percent ethyl acetate/hexanes) afforded 4-[1-(benzooxazol-2-ylcarbamoyl)-2-(4-fluorophenyl)-ethyl]-benzoic acid ethyl ester (722 mg, 82percent): m.p. 122-125¡ã C., LC/MS-ESI observed [M+H]+ 433.

With the synthetic route has been constantly updated, we look forward to future research findings about Benzo[d]oxazol-2-amine,belong benzoxazole compound

Reference£º
Patent; Brotherton-Pleiss, Christine E.; Walker, Keith A. M.; US2012/149718; (2012); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

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

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 ethanol (10 mL) and the mixture was concentrated. The residue was diluted with water (50 mL) and was extracted with dichloromethane (3*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.

With the complex challenges of chemical substances, we look forward to future research findings about 2-Benzoxazolinone

Reference£º
Patent; Memory Pharmaceuticals Corporation; US2010/22581; (2010); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

As a common heterocyclic compound, it belongs to benzoxazole compound, name is 2-(Methylthio)benzo[d]oxazole, and cas is 13673-62-6, its synthesis route is as follows.,13673-62-6

Ethyl N-(2-benzoxazolyl)-O-[3-(5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl)propyl]-L-tyrosinate (3-1) A mixture constituted by 1-4 (120 mg, 0.3 mmole) and 2-methylthiobenzoxazole (0.5 ml) and 30 mg of mercury dichloride is heated at 140 C. for 3 hours, followed by evaporating under reduced pressure and purifying by chromatography eluding with a gradient of AcOEt (0—>100) in CH2Cl2 in order to obtain 55 mg of the expected 3-1. IR (CHCl3) NH 3424 cm-1 (Max); C=O 1735 cm-1; conjugated system+Aromatic 1644, 1599, 1583, 1512 cm-1.

With the complex challenges of chemical substances, we look forward to future research findings about 13673-62-6,belong benzoxazole compound

Reference£º
Patent; Demassey, Jacques; Gourvest, Jean-Francois; Ruxer, Jean-Marie; Weston, John Bernard; LeFrancois, Jean-Michel; US2004/225111; (2004); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem

Name is 4-Aminobenzo[d]oxazol-2(3H)-one, as a common heterocyclic compound, it belongs to benzoxazole compound, and cas is 81900-93-8, its synthesis route is as follows.,81900-93-8

Preparation of 1-(4-(trifluoromethyl)-2-(piperidin-1-yl)benzyl)-3-(2,3-dihydro-2-oxobenzo[d]oxazol-4-yl)urea Amine 2c (350 mg, 1.33 mmol) was dissolved in 20 ml of AcOEt and at 0C triphosgene (395 mg, 1.33 mmol) was added to the solution. The mixture was warmed at 80C for 4 hours then evaporated and dissolved in 5ml of DMF. The solution of the isocyanate was added dropwise to a solution in DMF (10 ml) of compound 1b (100 mg, 0.66 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 40 mg of a white solid. Yield = 14% 1HNMR (DMSO, 400 MHz) delta 1.55 (2H, m), 1.68 (4H, m), 2.85 (4H, m), 4.43 (2H, d, J = 5.6 Hz), 6.88 (1H, t), 6.98 (2H, m), 7.05 (1H, m), 7.31 (1H, s), 7.42 (1H, d), 7.52 (1H, d, J = 8 Hz), 8.52 (1H, s), 11.00 (1H, bs); [M+1] 435.3 (C21H21F3N4O3 requires 434.41).

With the complex challenges of chemical substances, we look forward to future research findings about 4-Aminobenzo[d]oxazol-2(3H)-one

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

As a common heterocyclic compound, it belong benzoxazole compound,Benzo[d]oxazol-2-amine,4570-41-6,Molecular formula: C7H6N2O,mainly used in chemical industry, its synthesis route is as follows.,4570-41-6

2-Bromo-5-fluoropyridine (1) (lOg, 5.7lmmol), benzo[d]oxazol-2-amine (2) (766mg, 5.7lmmol), Xantphos (0.330g, 0.57mmol), and Cs2003 (2.79g, 8.56mmol) were combined in dry 1,4-dioxane (l5mL). The reaction mixture was degassed with N2(g) and placed under vacuum for 10mm. Pd2(dba)3 (0.261g, 0.28mmol) was then added and the resulting reaction mixture was heated at90¡ãC for 30h. It was then poured onto demineralized water (200mL), and extracted with EtOAc (3 x 100mL). The organic phases were combined, dried over Na2SO4, filtered and subsequently evaporated under vacuum. The resulting residue was purified by flash chromatography, eluting with EtOAc/Hexane (1:1) to provide N-(5-fluoropyridin-2-yl)benzo[d]oxazol-2-amine (3) as a yellow solid(0.6g, 46percent).LCMS (ES): Found 230.1 [MH]+.

With the synthetic route has been constantly updated, we look forward to future research findings about Benzo[d]oxazol-2-amine,belong benzoxazole compound

Reference£º
Patent; KARUS THERAPEUTICS LTD; SHUTTLEWORTH, Stephen Joseph; TOMASSI, Cyrille Davy; CECIL, Alexander Richard Liam; MACCORMICK, Somhairle; NODES, William John; SILVA, Franck Alexandre; WO2014/72714; (2014); 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.

Example 251A 6-bromo-1,3-benzoxazol-2(3H)-one A mixture of 2-benzoxazolinone (3.00 g, 22.2 mmol), 1,3-dibromo-5,5-dimethylhydantoin (3.49 g, 12.2 mmol), and trifluoromethanesulfonic acid (5.00 g, 33.3 mmol) in dichloromethane (100 mL) at room temperature was protected from light, stirred for 1 hour, and concentrated. The concentrate was purified by flash column chromatography on silica gel with 50% ethyl acetate/hexanes to provide the desired product., 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; Augeri, David J.; Baumeister, Steven A.; Bruncko, Milan; Dickman, Daniel A.; Ding, Hong; Dinges, Jurgen; Fesik, Stephen W.; Hajduk, Philip J.; Kunzer, Aaron R.; McClellan, William; Nettesheim, David G.; Oost, Thorsten; Petros, Andrew M.; Rosenberg, Saul H.; Shen, Wang; Thomas, Sheela A.; Wang, Xilu; Wendt, Michael D.; US2002/86887; (2002); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem