Day: September 18, 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.3405-77-4,5-Methylisoxazole-3-carboxylic acid,as a common compound, the synthetic route is as follows.

General procedure: To a solution of 2a (3.0g, 6.7mmol) in anhydrous DCM (30mL) was added CF3COOH (5.0mL, 67mmol) slowly at 0¡ãC. Then, the reaction mixture was stirred at RT for 2h and then concentrated. To a solution of the residue obtained in DCM (40mL) was added Et3N drop-wise to adjust the pH to 7.0at 0¡ãC, and then butyric acid (0.60g, 6.7mmol), EDCI (1.53g, 8.0mmol) and HOBt (1.08g, 8.0mmol) were sequentially added. After 20min, Et3N (3.8mL, 26.8mmol) was added drop-wise. Then, the reaction mixture was stirred at RT for 3h, followed by washing with H2O (50mL¡Á2), saturated citric acid solution (50mL¡Á2), saturated NaHCO3 solution (50mL¡Á2) and brine (50mL¡Á2). The organic phase was dried over Na2SO4 and concentrated, and the residue was purified by column chromatography (EtOAc: petroleum ether, 4: 1 v/v) to afford the pure product as a light yellow oil 3f (2.4g, 5.69mmol, 85percent)., 3405-77-4

3405-77-4 5-Methylisoxazole-3-carboxylic acid 76947, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Article; Zhai, Yangyang; Ma, Yuying; Ma, Fei; Nie, Quandeng; Ren, Xuejiao; Wang, Yaxin; Shang, Luqing; Yin, Zheng; European Journal of Medicinal Chemistry; vol. 124; (2016); p. 559 – 573;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.91252-54-9,Ethyl 5-(tert-butyl)isoxazole-3-carboxylate,as a common compound, the synthetic route is as follows.,91252-54-9

Ethyl 5-(tert-butyl)isoxazole-3-carboxylate 17 (1000mg, 5.1mmol) and LiOH (638mg, 15.3mmol) were dissolved in 30mL MeOH and 10mLH2O, respectively. Then the solution was stirred at rt. for 1h. In an ice-cooled bath, 1N Na2SO4 was added, and the mixture was extracted by EtOAc. The organic layer was separated and washed with brine. After drying with anhydrous Na2SO4, the solution was concentrated to give the intermediate 18 (818mg, 95%) as a light yellow oil. 1H NMR (300MHz, CDCl3) delta 10.64 (s, 1H), 6.42 (s, 1H), 1.37 (s, 9H).

As the paragraph descriping shows that 91252-54-9 is playing an increasingly important role.

Reference£º
Article; Liu, Zhiqing; Tian, Bing; Chen, Haiying; Wang, Pingyuan; Brasier, Allan R.; Zhou, Jia; European Journal of Medicinal Chemistry; vol. 151; (2018); p. 450 – 461;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

59669-59-9, 3-(tert-Butyl)isoxazol-5-amine is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

59669-59-9, Step 2: Synthesis of (S)-l-(4-Chloro-phenyl)-6-oxo-piperidine-2-carboxylic acid (3-tert- butyl-isoxazol-5-yl)-amideTo a cold slurry of (S)-l-(4-Chloro-phenyl)-6-oxo-piperidine-2-carboxylic acid (0.2g; 0.788mmol) and 5-amino-3-tert-butylisoxazole (0.11Og; 0.788mmol) in pyridine (0.956mL; 11.820mmol) is added phosphorous oxychloride (O.O88mL; 0.946mmol). The mixture is stirred at O0C for 30 minutes and then diluted with water and extracted with ethyl acetate several times. The organics are combined and washed with water and brine, dried (Na2SO4), filtered and concentrated in vacuo. Purification by preparative HPLC affords title compound, m/z 376 [M+H+].

As the paragraph descriping shows that 59669-59-9 is playing an increasingly important role.

Reference£º
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GMBH; BARTOLOZZI, Alessandra; BERRY, Angela; CIRILLO, Pier Francesco; HICKEY, Eugene Richard; RIETHER, Doris; WU, Lifen; ZINDELL, Renee M.; WO2010/96371; (2010); A2;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

3445-52-1, 5-Methylisoxazole-3-carboxamide is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 1 STR80 2.52 g (0.02 mol) of 5-methyl-isoxazole-3-carboxamide are dissolved in 50 ml of 1,4-dioxane and after adding 3.4 g (0.06 mol) of powdered potassium hydroxide the mixture is stirred at 80 C. for 30 minutes. The mixture is cooled, 5.7 g (0.022 mol) of methyl 2-chlorosulphonylbenzoate are added at room temperature for 20 hours. The solvent is then distilled off in vacuo, the residue is taken up in water and the solution is filtered. The product precipitates from the filtrate on acidifying with hydrochloric acid, and is collected on a suction filter and dried on clay. 1.8 g (27% of theory) of N-(2-methoxycarbonylphenylsulphonyl)-5-methyl-isoxazole-3-carboxamide of melting point 101 C. are obtained.

3445-52-1, The synthetic route of 3445-52-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Bayer Aktiengesellschaft; US5256632; (1993); A;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.59669-59-9,3-(tert-Butyl)isoxazol-5-amine,as a common compound, the synthetic route is as follows.

59669-59-9, General procedure: A solution of compounds 10a?d or compounds 17a?d (1.0 mmol) in dichloromethane (10 mL) was slowly added to a stirred solution of triphosgene (109 mg, 0.36 mmol) in dichloromethane (50 mL) over a period of 30 min using a syringe. After stirring for a further 30 min, a solution of compound 25a?r (0.6 mmol) and triethylamine (0.4 mL, 2.77 mmol) in dichloromethane (10 mL) was added in one portion. The reaction mixture was stirred for 2 h at room temperature. After completion of the reaction, the reaction was poured into water (50 mL) and extracted three times with dichloromethane. The organic layer was washed with water (5 mL), sat. NaCl solution (5 mL), anddried over Na2SO4. After evaporation of solvent under vacuum, the residue was purified by silica gel chromatography to give the desired chromanylurea or 2H-chromenyl urea compounds.

The synthetic route of 59669-59-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Li, Xingzhou; Zhou, Xinming; Zhang, Jing; Wang, Lili; Long, Long; Zheng, Zhibing; Li, Song; Zhong, Wu; Molecules; vol. 19; 2; (2014); p. 2004 – 2028;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

21169-71-1, Isoxazole-5-carboxylic acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 134 Isoxazole-5-carboxylic acid (1-{4-[3-chloro-2-(5-methyl-[1,2,4]oxadiazol-3-yl)-indol-1-yl]-benzylcarbamoyl}-cyclopropyl)-amide To a solution of 12.0 mg (0.106 mmol) of isoxazole-5-carboxylic acid in 2 mL of dichloromethane and 0.2 mL of N,N-dimethylformamide 15 mg (0.036 mmol) of 1-amino-cyclopropanecarboxylic acid 4-[3-chloro-2-(5-methyl-[1,2,4]oxadiazol-3-yl)-indol-1-yl]-benzylamide (Reference Example 9), 40.5 mg (0.106 mmol) of HBTU and 28.8 muL (0.43 mmol) of triethylamine were added. The mixture was shaken at room temperature for 18 h, then purified by column chromatography using n-hexane and ethylacetate as eluent to yield 17 mg (91%) of the title compound. MS (EI) 517.1 (MH+)., 21169-71-1

21169-71-1 Isoxazole-5-carboxylic acid 2060599, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; Richter Gedeon Nyrt.; Beke, Gyula; Benyei, Gyula Attila; Borza, Istvan; Bozo, Eva; Farkas, Sandor; Hornok, Katalin; Papp, Andrea; Vago, Istvan; Vastag, Monika; US2013/217702; (2013); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

21169-71-1, Isoxazole-5-carboxylic acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

The title compound N-[5(S)-3-[4-(1-cyanocyclopropan-1-yl)phenyl]-2-oxooxazolidin-5-ylmethyl]isoxazole-5-carboxamide (197 mg) was prepared from 5(S)-aminomethyl-3-[4-(1-cyanocyclopropan-1-yl)phenyl]oxazolidin-2-one (150 mg) and isoxazole-5-carboxylic acid (85.7 mg) in the same manner as described for EXAMPLE 62. [0508] MS (EI+) m/z: 352 (M+). [0509] HRMS (EI+) for C18H16N4O4 (M+): calcd, 352.1172; found, 352.1179.

21169-71-1, The synthetic route of 21169-71-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Fukuda, Yasumichi; US2003/225107; (2003); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.16401-14-2,Isoxazole-5-carbaldehyde,as a common compound, the synthetic route is as follows.

General procedure: A solution of 19 (300 mg, 0.70 mmol) in tetrahydrofuran (3 mL) was slowly added to a solution of lithium diisopropylamide (LDA) in heptane/tetrahydrofuran/ethylbenzene (2 M, 0.38 mL, 0.76 mmol) at 78oC, and the resultant solution was stirred at -78oC for 30 minutes. Chlorotitanium triisopropoxide (1 M, 2.8 mL) was then added slowly, and the resulting mixture was stirred at 40oC for 1 hour. The reaction was cooled to -78oC, and propionaldehyde (49 mg, 0.84 mmol) was added slowly. This mixture was then warmed to 40oC, and stirred at 40oC for 2 hours. The reaction mixture was quenched with saturated aqueous ammonium chloride solution (1 mL), diluted with 10 mL of tetrahydrofuran, and treated with Celite for 1 hour. The resultant slurry was filtered and concentrated. The resultant residue was purified by silica gel chromatography (gradient: 95:5 hexanes:ethyl acetate to 65:35 hexanes:ethyl acetate) to provide 20 as a white solid. Yield: 230 mg, 68%., 16401-14-2

The synthetic route of 16401-14-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Warmus, Joseph S.; Quinn, Cheryl L.; Taylor, Clarke; Murphy, Sean T.; Johnson, Timothy A.; Limberakis, Chris; Ortwine, Daniel; Bronstein, Joel; Pagano, Paul; Knafels, John D.; Lightle, Sandra; Mochalkin, Igor; Brideau, Roger; Podoll, Terry; Bioorganic and Medicinal Chemistry Letters; vol. 22; 7; (2012); p. 2536 – 2543;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

3209-71-0, Isoxazole-3-carboxylic Acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: Aromatic or non-aromatic heterocyclic acid (1 eq) and HATU (1.2 eq) were weighed out and transferred to a vial to which DMF and DIPEA (3-5 eq) were subsequently added. The amine(HNRR) was added to the reaction mixture as a free base or HCl salt after a short period and the reaction was stirred atroom temperature or at 50 C. for 2-18 hours. Reaction conversion wasmonitored by LCMS. Upon completion, the reaction was cooled and the crudeproduct was triterated via addition ofwater and collected by filtration orextracted with sat ammonium chloride and DCM. Trituration or purification by chromatography gave the amide., 3209-71-0

As the paragraph descriping shows that 3209-71-0 is playing an increasingly important role.

Reference£º
Patent; Genentech, Inc.; Blaquiere, Nicole; Castanedo, Georgette; Feng, Jianwen A.; Hu, Baihua; Staben, Steven; Yuen, Po-wai; Wu, Guosheng; Lin, Xingyu; Burch, Jason; US2015/57260; (2015); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.88511-37-9,1-(Isoxazol-3-yl)ethanone,as a common compound, the synthetic route is as follows.

88511-37-9, To a -78 C solution of l-(isoxazol-3-yl)ethanone (46 mg, 0.41 mmol) in tetrahydrofuran (1 mL) was added lithium hexamethyldisilazide (1 M in toluene, 370 mu, 0.37 mmol) in a dropwise manner over the course of 5 minutes. The solution was immediately warmed to 0 C for 30 minutes at which point methyl pyrimidine-2-carboxylate (49 mg, 0.35 mmol) was added in a single portion. After stirring for 15 minutes at 0 C, the solution was warmed to room temperature for 18 hours. The solvent was removed in vacuo, and residue was diluted with ether (5 mL) and filtered. The resulting solid (72 mg, 0.32 mmol) was re-suspended in ethanol (0.5 mL) with 3-fluoro-2-(hydrazinylmethyl)pyridine dihydrochloride (60 mg, 0.28 mmol). The solution was heated to 40 C until LCMS indicated consumption of intermediate dione. The solvent was removed in vacuo. The crude residue was purified via silica gel chromatography (3-100% hexanes in ethyl acetate) to give compound 57 (20 mg, 20% yield) as an off-white solid. Compound-57: 1H-NMR (400 MHz, CDC13) delta 8.81 (d, 2H), 8.43 (d, 1H), 8.21 (d, 1H), 7.49 (s, 1H), 7.35 (dt, 1H), 7.21 (t, 1H), 7.12-7.16 (m, 1H), 6.68 (d, 1H), 6.19 (s, 2H).

88511-37-9 1-(Isoxazol-3-yl)ethanone 21349800, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; IRONWOOD PHARMACEUTICALS, INC.; KIM, Charles; NAKAI, Takashi; MOORE, Joel; PERL, Nicholas, Robert; IM, G-yoon, Jamie; BARDEN, Timothy, Claude; IYENGAR, Rajesh, R.; ZIMMER, Daniel, P.; FRETZEN, Angelika; RENHOWE, Paul, Allan; WO2013/101830; (2013); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem