Month: August 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1072-67-9,5-Methylisoxazol-3-amine,as a common compound, the synthetic route is as follows.

General procedure: A mixture of 7-nitro-2,3-dihydrobenzo[b][1,4]dioxine-6-carbaldehyde (1), (1 mmol, 0.21 g), aniline (2a) (1 mmol, 0.09mL), dimethyl phosphite (3) (1 mmol, 0.12 mL), and Nano-TiO2/SiO2 (5 mol%) were taken in a 10 mL round-bottomed flask, stirred at 50 C for 5min. After completion of the reaction,which was indicated by TLC, the mixture was washed with ethylacetate (20 mL) to recover the catalyst by simple filtration. Thesolvent was evaporated under vacuum and the resulting crudeproduct was purified by column chromatography on silica gelusing n-hexane/ethyl acetate (1:1) as eluent to afford the pureproduct dimethyl (7-nitro-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)(phenylamino)methylphosphonate (4a) (94%, Table 1).The same procedure was adopted for the preparation of allremaining title products (4b-m) by taking 2b (0.09 mL), 2c(0.13 g), 2d (0.17 g), 2e (0.10 g), 2f (0.12 g), 2g (0.14 g), 2h (0.14g), 2i (0.15 g), 2j (0.98 g), 2k (0.94 g), 2l (0.17 g) and 2m (0.15g), respectively.The Supplementary Material file contains complete characterizationdata for the new compounds and selected spectra for4a, 4b, and 4k (Figures S3-S11).

As the paragraph descriping shows that 1072-67-9 is playing an increasingly important role.

Reference£º
Article; Sravya; Grigory, Zyryanov V.; Balakrishna; Reddy, K. Madhu Kumar; Reddy, C. Suresh; Reddy, G. Mallikarjuna; Camilo; Garcia; Reddy, N. Bakthavatchala; Phosphorus, Sulfur and Silicon and the Related Elements; vol. 193; 9; (2018); p. 562 – 567;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

206055-91-6, (3-(4-Bromophenyl)isoxazol-5-yl)methanol is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: 1,1′-ferrocenedicarboxylic acid (0.274 g, 1.0 mmol) and DCC (0.452 g, 2.2 mmol) were added into a 25 mL one necked round bottom flask with 5 mL dry THF. The mixture was stirred in a cold bath and protected under nitrogen for about 10 min. Then DMAP (0.28 g, 2.2 mmol) in 5 mL dry THF was added to the reaction system using a syringe, the mixture was stirred in the cold bath for an additional 30 min. Subsequently, 2.0 mmol 2a in 5 mL THF was added dropwise to the reaction system using a syringe, at that time, the temperature was maintained at room temperature. After the completion of the reaction monitored by thin layer chromatography (TLC), the reaction mixture was evaporated under reduced pressure, and the residual was directly purified by column chromatography on silica gel with elution by petroleum ether and ethyl acetate (5:1?2:1). Fractions with similar Rf values were combined and vacuum distilled to obtainthe desired compound 3a.

206055-91-6 (3-(4-Bromophenyl)isoxazol-5-yl)methanol 11032412, aIsoxazoles compound, is more and more widely used in various.

Reference£º
Article; Yong, Jianping; Yang, Mingxue; Lu, Canzhong; Wu, Xiaoyuan; Letters in drug design and discovery; vol. 15; 11; (2018); p. 1141 – 1146;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.62348-13-4,Isoxazole-5-carbonyl chloride,as a common compound, the synthetic route is as follows.

(e) (18 mg, 0.13 mmol) was added in a solution of 2′ (62 mg,0.10 mmol) and Et3N (25 mg, 0.25 mmol) in dry THF (1.0 mL).The mixture was stirred at room temperature for 0.5 h. The reaction completion was confirmed by TLC (DCM/MeOH/AcOH = 40:1:0.5). The solution was poured into water andextracted by ether. Collecting the organic phase was washed bybrine and dried over Na2SO4. Then it was concentrated andthe compound was Prep-HPLC to get 902136 (35 mg) as a white solid. Yield = 51%; 1H NMR (400 MHz, DMSO-d6) d: 8.352 (s, 1H),7.897-7.852 (m, 3H), 7.711-7.652 (m, 2H), 7.437-7.305 (m, 6H),7.108 (d, J = 8 Hz, 2H), 5.774 (s, 1H), 4.457-4.423 (m, 1H), 4.292-4.262 (m, 1H), 4.144-4.093 (m, 2H), 3.638-3.603 (m, 2H), 2.988-2.942 (m, 1H), 2.861-2.804 (m, 1H), 2.180-1.997 (m, 2H), 1.922-1.840 (m, 2H), 1.658-1.656 (m, 2H), 1.569-1.471 (m, 3H), 1.344(m, 1H), 1.244 (m, 2H), 1.008-0.776 (m, 5H). ESI-MS: 690.8(C40H42N4O7, [M+H]+).

The synthetic route of 62348-13-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Curreli, Francesca; Haque, Kashfia; Xie, Lihua; Qiu, Qian; Xu, Jinfeng; Yong, Weizhong; Tong, Xiaohe; Debnath, Asim K.; Bioorganic and Medicinal Chemistry; vol. 23; 24; (2015); p. 7618 – 7628;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

19788-37-5, 4-(Chloromethyl)-3,5-dimethylisoxazole is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: The corresponding halide reagent (1mmol) was added to a mixture of 1.2mmol of potassium thio- (compounds e) or seleno-cyanate (compounds f) in dry acetone (20mL). The mixture was stirred at reflux for 2-24h and the product was isolated by filtration or extraction with ether or dichloromethane after addition of 50mL of water. Final product was purified by washing or recrystallizing.

19788-37-5 4-(Chloromethyl)-3,5-dimethylisoxazole 88246, aIsoxazoles compound, is more and more widely used in various.

Reference£º
Article; Alcolea, Veronica; Plano, Daniel; Encio, Ignacio; Palop, Juan Antonio; Sharma, Arun K.; Sanmartin, Carmen; European Journal of Medicinal Chemistry; vol. 123; (2016); p. 407 – 418;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.288-14-2,Isoxazole,as a common compound, the synthetic route is as follows.

Step 4. Preparation of 4-[3-methyl-5-(3-chlorophenyl)isoxazol-4-yl]benzenesulfonamide Following the procedure of Example 14, Step 4, the isoxazole from Step 3 (2 g, 7.4 mmol) was reacted with chlorosulfonic acid (8 mL) and quenched with ammonium hydroxide. The crude product was recrystallized from ethyl acetate to give pure sulfonamide (220 mg): mp 176-178 C. Anal. Calc’d. for C16 H13 ClN2 O3 S (348.81): C, 55.10; H, 3.76; N, 8.03; S, 9.19. Found: C, 54.60; H, 3.63; N, 7.77; S, 9.21.

As the paragraph descriping shows that 288-14-2 is playing an increasingly important role.

Reference£º
Patent; G. D. Searle & Co.; US5859257; (1999); A;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

31329-64-3, 3,5-Dimethylisoxazol-4-amine is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 15 7-Difluoromethoxy-2-methoxymethylbenzofuran-4-carboxylic acid (3,5-dimethylisoxazol-4-yl)-amide Cyanuric chloride (19 mg) and triethylamine (0.05 ml) were added to a stirred solution of 7-difluoromethoxy-2-methoxymethylbenzofuran-4-carboxylic acid (85 mg) in dry dichloromethane at room temperature under a dry nitrogen atmosphere. After stirring for 20 minutes 3,5-dimethylisoxazol-4-ylamine (42 mg) was added and the reaction left overnight. The reaction was mixture was preadsorbed onto silica. Purification by column chromatography on silica eluding with 30% ethyl acetate in hexane gave the title compound as a cream solid (33 mg) TLC Rf 0.52 (50% ethyl acetate in hexane) Mass spectrum m/z 367 [M+H].

31329-64-3 3,5-Dimethylisoxazol-4-amine 182040, aIsoxazoles compound, is more and more widely used in various.

Reference£º
Patent; Dyke, Hazel Joan; Lowe, Christopher; Montana, John Gary; US2001/31777; (2001); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

19788-36-4, (3,5-Dimethyl-4-isoxazolyl)methanol is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a solution of (3,5-dimethylisoxazol-4-yl)methano3 (1.00 g, 7.86 mmol) in CH2CI2 (20 mL) at 0 C was added Dess-Martin periodinane (4.17 g, 9.83 mmol) over 10 min and the reaction mixture was warmed to rt. The reaction mixture was stirred at rt for 60 min and then filtered through CeHte* and washed through with 0??. The organic layer was dried over N82SO4, concentrated, and purified by column chromatography (15% EtO Ac/hex anes) to provide the title compound (0.450 g, 46%). T NMR (400 MHz, DM80-d6) delta ppm 9.92 (s, 1H), 2.68 (s, 3H), 2.3′ (s, 3H).

As the paragraph descriping shows that 19788-36-4 is playing an increasingly important role.

Reference£º
Patent; TEMPERO PHARMACEUTICALS, INC.; BALOGLU, Erkan; GHOSH, Shomir; LOBERA, Mercedes; SCHMIDT, Darby, R.; WO2013/19635; (2013); 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.14678-02-5,5-Amino-3-methylisoxazole,as a common compound, the synthetic route is as follows.

Example 178; N-(4-Chloro-3-methylisoxazol-5-yl)-4-(4-phenyl-1,3-thiazol-2-yl)piperazine-1-carboxamide; (1) 4-Chloro-3-methylisoxazole-5-amine; To a solution of 3-methylisoxazole-5-amine (5.00 g, 51.0 mmol) in dichloromethane (40 ml) was slowly added N-chlorosuccinimide (6.80 g, 51.0 mmol) with ice-cooling and the mixture was stirred for 1 hour with ice-cooling and then at room temperature for 2 hours. The reaction mixture was washed with an aqueous 1N sodium hydroxide solution and dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure. Hexane was added to the residue and the desired product (5.65 g, 83.6%) as a solid was collected by filtration. 1H-NMR (CDCl3) delta; 2.18 (3H, s), 4.54 (2H, br s).

14678-02-5 5-Amino-3-methylisoxazole 84590, aIsoxazoles compound, is more and more widely used in various.

Reference£º
Patent; Takeda Pharmaceutical Company Limited; EP1813606; (2007); 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.1072-67-9,5-Methylisoxazol-3-amine,as a common compound, the synthetic route is as follows.

General procedure: Nitrosyl sulfuric acid solution was prepared from concentrated sulfuric acid (1.5mL) and sodium nitrite (0.14g, 2mmol) at 70C and then cooled to 5C. This solution was added dropwise, with stirring, to 3mL of (acetic acid+propionic acid) mixture (5:1v/v) containing 2.0mmol of heterocyclic amines in an ice bath. The mixture was then stirred for 1.5h at about 0-5C. After completion of diazotization procedure, the diazonium salt solution was added dropwise to the solution of 8-chloro 4-hydroxyquinoline -2-(1H)-one (0.39g, 2.0mmol) in sodium hydroxide (0.32g, 8.0mmol) and water (6.0ml). The resulting solution was vigorously stirred at about 0-4C for 2h, while the pH of the reaction mixture was maintained 10-11 by adding 2.5% sodium hydroxide solution. The progress of the reaction was followed by TLC, using (ethyl acetate+petroleum ether) mixture (5:1 v/v) as solvent. Afterwards, the pH of reaction mixture was regulated 4-5 by means of a 10% hydrochloric acid solution. At the end of the procedure, the resulting solid was filtered, washed thoroughly with cold ethanol and dried. Recrystallization from DMF-H2O ended in pure crystals of the dye. The physical and spectral data of the purified dyes are as follows.

The synthetic route of 1072-67-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Yahyazadeh, Asieh; Yousefi, Hessamoddin; Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; vol. 117; (2014); p. 696 – 701;,
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

(Cis)-4-phenyldecahydroquinolin-4-ol (enantiomer A, 100 mg, 0.432 mmol), isoxazole-3- carboxylic acid (63.5 mg, 0.562 mmol), EDC (108 mg, 0.562 mmol), HOAt (1.124 ml, 0.5 M in DMF, 0.562 mmol), and TEA (0.078 ml, 0.562 mmol) were combined in DMF (2 ml) at RT. After 16 hr the mixture was filtered using a 0.45 mum PTFE syringe filter and concentrated. The residue was purified by preparative reversed-phase HPLC on a Waters Sunfire column (20×150 mm, 5mum) with gradient elution using 5-70% CH3CN/water containing 0.1% TFA over 20 minutes. Fractions containing the product were pooled and concentrated to give the title compound as an off-white solid (72 mg, 51%).

The synthetic route of 3209-71-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; MERCK & CO., INC.; WO2008/88744; (2008); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem