Heterocyclic Building Blocks-isoxazole

42831-50-5, 5-Methylisoxazole-4-carboxylic acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,42831-50-5

EXAMPLE 1 2-Cyano-3-hydroxythiocrotonic acid-S-phenyl ester A 72 ml. portion of thionyl chloride is added dropwise to a mixture of 70.24 g. of 5-methylisoxazole-4-carboxylic acid [H. Yasuda, Yakugaku Zasshi, 79, 836-838 (1959); C. A. 53, 21885d] and 64.44 g. of sodium carbonate in 250 ml. of chloroform. The mixture is heated gently on a steam bath for 4 hours, then the solid is filtered and the filtrate is evaporated to an oil. This oil is distilled at 4.5 mm. and the material boiling at 68-70 C. is collected, giving 65.23 g. of 5-methylisoxazole-4-carbonyl chloride.

The synthetic route of 42831-50-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; American Cyanamid Company; US4254047; (1981); 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.62348-13-4,Isoxazole-5-carbonyl chloride,as a common compound, the synthetic route is as follows.,62348-13-4

General procedure: Compound 12a (0.05mmol, 20mg) and DIEA (0.075mmol, 9.75mg) were dissolved in 0.5mL of DMF and cooled to 0C, then propionyl chloride (0.06mmol, 5.5mg) was added to the system and the mixture was stirred at 0C for 1h. The system was extracted with EtOAc and dried with anhydrous Na2SO4. The solvents were removed under vacuum and the residue was purified by silica gel flash chromatography (DCM: MeOH=15: 1) to afford compound 13a (15mg, yield 65%).

As the paragraph descriping shows that 62348-13-4 is playing an increasingly important role.

Reference£º
Article; Wang, Qiang; Liu, Feiyang; Qi, Shuang; Qi, Ziping; Yan, Xiao-E.; Wang, Beilei; Wang, Aoli; Wang, Wei; Chen, Cheng; Liu, Xiaochuan; Jiang, Zongru; Hu, Zhenquan; Wang, Li; Wang, Wenchao; Ren, Tao; Zhang, Shanchun; Yun, Cai-Hong; Liu, Qingsong; Liu, Jing; European Journal of Medicinal Chemistry; vol. 150; (2018); p. 366 – 384;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

288-14-2, Isoxazole is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To the solution of 4a (Ig, 14.5mmol) in trifluoroacetic anhydride (7mL, 50.7mmol) was added ammonium nitrate (1.8g, 22.5mmol) in 0.3g each portion, keeping the reaction temperature between 25-3O0C. After the addition was complete, the mixture was poured into ice water and extracted with DCM (15mLx4). The extract was washed with water and the aqueous layer was extracted with DCM. The combined DCM extract was dried over MgSO4, filtered and concentrated to give a yellow green oil. The oil was triturated by hexane (cooled to 50C) to provide a solid which was filtered to provide 4b (0.72g, 44%).

288-14-2, The synthetic route of 288-14-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; XCOVERY, INC.; WO2009/154769; (2009); 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

General procedure: Compounds were synthesized in solution phase using Boc-protected amino acids on 100-200mg scale. Firstly, the amino acid (1.2-1.5equiv) was activated with HBTU (1.5equiv) and DIPEA (1.5equiv) as 0.2-0.5M solution in DMF for 10min. Then the solution was added to an amino group bearing C-terminal moiety (R1R2NH) and the mixture was stirred for a minimum of 1h at room temperature. The reaction mixture was diluted with EtOAc and washed with saturated NaHCO3 (2¡Á). The organic extracts were dried over MgSO4, filtered and evaporated in vacuo. The crude product was then treated with 20% TFA in DCM and stirred for 1-2h to remove the Boc group. TFA was removed by evaporating the reaction mixture under a stream of N2. The residue was dissolved in DCM and washed with saturated NaHCO3 (2¡Á). DCM phase was dried with MgSO4, filtered and evaporated in vacuo. Subsequent N-Boc-amino acids and amines were sequentially coupled under the same conditions. Each coupling reaction was monitored by ESMS, with most reactions going to completion overnight. All final compounds were purified on rpHPLC (97% by analytical HPLC) and fully characterized by NMR and HRMS (yields between 30% and 40%).

21169-71-1, As the paragraph descriping shows that 21169-71-1 is playing an increasingly important role.

Reference£º
Article; Yau, Mei-Kwan; Liu, Ligong; Lim, Junxian; Lohman, Rink-Jan; Cotterell, Adam J.; Suen, Jacky Y.; Vesey, David A.; Reid, Robert C.; Fairlie, David P.; Bioorganic and Medicinal Chemistry Letters; vol. 26; 3; (2016); p. 986 – 991;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1750-42-1,Isoxazol-3-amine,as a common compound, the synthetic route is as follows.

A 40-mL vial was charged with imidazole (922 mg, 13.6 mmol) and 3-aminoisoxazole (320 |xL, 4.34 mmol) then purged with nitrogen. CH2C12 (10 mL) was introduced and the reaction mixture was cooled to -78 C in a dry ice-acetone bath. Sulfuryl chloride (352.0 |xL, 4.32 mmol) was added dropwise via syringe to the reaction mixture. Following addition, the cold bath was removed and the resultant mixture was allowed to warm to ambient temperature. After 30 minutes, (Rac)-1 -(4-bromo-5 -fluoro-2-methoxyphenyl)-5,6,7,8-tetrahydro-l,6-naphthyridin-2(lH)-one (See Preparation 8a, step 1, 957 mg, 2.71 mmol) was introduced in a single portion followed by CH2C12 (10.0 mL). The vial was sealed with a PTFE lined cap and the reaction mixture was warmed to 80 C. After 30 min, the reaction mixture was cooled to ambient temperature and diluted with an aqueous solution of citric acid (1.0 M, 25 mL), brine (25 mL) and EtOAc (50 mL). The layers were separated and the aqueous layer was extracted with EtOAc (3 x 25 mL). The combined organic layers were dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure and purified (100-g silica gel SNAP Ultra column, 0 to 50% 3:1 EtOAc/EtOH in heptane with DCM as a 10% additive) to afford (rac)-1-(4-bromo-5-fluoro-2-methoxyphenyl)-N-(isoxazol-3-yl)-2-oxo-1,2,7,8-tetrahydro-1,6-naphthyridine-6(5H)-sulfonamide (1.01 g, 2.023 mmol, 74.7 % yield) as a yellow solid.

1750-42-1, The synthetic route of 1750-42-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; USA Anjin Corporation; M .weisi; B .C.miergelamu; T .dining; J .siteerwogen; A .gusiman-peileisi; A .beiqiao; I .E.makesi; (177 pag.)CN107531705; (2018); A;,
Isoxazole – Wikipedia
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5765-44-6, 5-Methylisoxazole is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

5765-44-6, To a solution of 5-methyl isoxazole (5.0 g) in ethyl acetate (100 ml), N-bromo succinate imide (23.6 g) and 2,2′-azobisisobutyronitrile (200 mg) were added to the mixture, and the mixture was refluxed overnight under nitrogen atmosphere. After cooling to 0C, the insolubles were filtered off, the filtrate was washed with an aqueous solution of sodium thiosulfate and saturated brine, and dried over magnesium sulfate. The solvent was distilled off under reduced pressure and the residue was separated and purified by silica gel column chromatography (hexane:ethyl acetate = 10:1), to give 5-bromomethyl isoxazole (1.0 g) as oil. 1H-NMR (200 MHz, CDCl3) delta 4.50 (2H, s), 6.34 (1H, d, J = 1.8 Hz), 8.23 (1H, d, J = 1.8 Hz)

5765-44-6 5-Methylisoxazole 79833, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; Takeda Chemical Industries, Ltd.; EP1422228; (2004); 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.1188032-12-3,5-(3-Fluorophenyl)isoxazole-3-carboxylic acid,as a common compound, the synthetic route is as follows.

1188032-12-3, Example 126 Synthesis of 5-(3-Fluoro-phenyl)-isoxazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide DIPEA (131 mg, 1.0 mmol) was added to a stirred solution of 5-(3-fluoro-phenyl)-isoxazole-3-carboxylic acid (60 mg, 0.29 mmol) (prepared by the method used for the synthesis of Intermediate 25, starting from 3′-fluoroacetophenone) in DMF (2 mL) followed by HOBt (41 mg, 0.3 mmol) and EDCI.HCl (58 mg, 0.3 mmol). After 2 minutes 2-amino-1-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethanone hydrochloride (125 mg, 0.37 mmol) (prepared according to Step 1 and 5 of the General Scheme) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, extracted with ethyl acetate, dried over sodium sulfate and concentrated under reduced pressure. Purification by recrystallisation from methanol afforded 84 mg (59.15% Yield) of 5-(3-fluoro-phenyl)-isoxazole-3-carboxylic acid {2-oxo-2-[4-(3-trifluoromethyl-phenoxy)-piperidin-1-yl]-ethyl}-amide. LC/MS [M+H]+: 492, 70.25%. 1H NMR (300 MHz, DMSO-d6): delta8.6 (t, 1H), 7.8 (m, 2H), 7.5 (m, 3H), 7.24 (m, 4H), 4.7 (m, 1H), 4.2 (d, 2H), 3.9 (m, 1H), 3.7 (m, 1H), 3.4 (m, 2H), 2.0 (m, 2H), 1.6 (m, 2H).

1188032-12-3 5-(3-Fluorophenyl)isoxazole-3-carboxylic acid 66591590, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; Forest Laboratories Holdings Limited; US2009/239810; (2009); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

33282-23-4, 5-(4-Bromophenyl)isoxazole-3-carboxylic acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a solution of carboxylic acid 21-29 (1 equiv) in anhydrous CH2Cl2 were successively added HBTU (1.5 equiv), HOBt (0.5 equiv) and DIPEA (2 equiv). The mixture was stirred for 45 min at room temperature. Then, the appropriate amine (1.1 equiv) was introduced and the stirring was continued for 24 h. At the end of the reaction, the mixture was filtered off and the filtrate was successively washed with saturated aqueous NaHCO3 solution, 1N aqueous HCl and distilled water. The organic layer was dried over MgSO4 and was concentrated in vacuo. The resulting residue was purified by TLC (cyclohexane/AcOEt, 7:3) and crystallized in absolute EtOH to give carboxamide 30-48.

33282-23-4, The synthetic route of 33282-23-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Andrzejak, Virginie; Muccioli, Giulio G.; Body-Malapel, Mathilde; El Bakali, Jamal; Djouina, Madjid; Renault, Nicolas; Chavatte, Philippe; Desreumaux, Pierre; Lambert, Didier M.; Millet, Regis; Bioorganic and Medicinal Chemistry; vol. 19; 12; (2011); p. 3777 – 3786;,
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

Isoxazole-5-carboxylic acid (0.500 g, 4.4 mmol) was dissolved in a solution of hydrochloric acid in ethanol (5 M) and refluxed for 5 hours. The mixture was concentrated under reduced pressure giving isoxazole-5-carboxylic acid ethyl ester, which was used immediately in the following step.

21169-71-1, As the paragraph descriping shows that 21169-71-1 is playing an increasingly important role.

Reference£º
Patent; AKZO NOBEL N.V.; WO2005/102998; (2005); 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.

3-amino-5-methylisooxazole (326 mg, 3.3 mmol) was dissolved in dichloromethane (6.5 mL), and ice-cooled. Thiophosgene (0.278 mL, 3.3×1.1 mmol) and sodium carbonate aqueous solution (769 mg, 3.3×2.2 mmol, 4 mL) were added, and stirred at room temperature for 2.5 hours. After the reaction, chloroform was added and washed with the saturated sodium chloride solution, dried with magnesium sulfate and the solvent was distilled off. The obtained residue was purified by Silica gel column chromatography (Biotage Isolera One, SANP 10 g, chloroform/methanol)to obtain title compound (yellow oil, 255 mg, 55.1%) ., 1072-67-9

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

Reference£º
Patent; CHIBA UNIVERSITY; YAKULTHONSHA COMPANY LIMITED; TAKAYAMA, HIROMITSU; YASOBU, NAOKO; KITAJIMA, MARIKO; YAEGASHI, TAKASHI; MATSUZAKI, TAKESHI; NAGAOKA, MASATO; HASHIMOTO, SHUSUKE; NISHIYAMA, HIROYUKI; SUGIMOTO, TAKUYA; ONO, MASAHIRO; (176 pag.)JP5829520; (2015); B2;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem