Month: November 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.

EXAMPLE 1 SPC10 3-(Chloroacetamido)-5-Methylisoxazole To 800 ml of chloroform is added 118 grams (1.12 moles) of 3-amino-5-methylisoxazole followed by 118 grams (1.5 moles) of pyridine. To this solution is added 147 grams (1.3 moles) of chloroacetylchloride with the addition temperature maintained at 0-10C. The reaction is then stirred at room temperature for 1 hour, filtered and dried in a vacuum desiccator to give 116 grams (56%) of 3-(chloroacetamido)-5-methylisoxazole, mp 192-195C. This material is slightly irritating to the skin and due caution should be exercised. Anaylsis: Calc’d for C6 H7 ClN2 O2 (174.58): C, 41.28; H, 4.04; N, 16.05; Cl, 20.31. Found: C, 41.55; H, 4.10; N, 15.79; Cl, 20.50., 1072-67-9

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

Reference£º
Patent; Warner-Lambert Company; US3957772; (1976); A;,
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

4-Chloromethyl-3,5-dimethylisoxazole (300 mg, 2.07 mmol) was dissolved in dimethyl sulfoxide (3 mL) and sodium cyanide (121 mg, 2.48 mmol) was added at 25C. The reaction was warmed to 60C and reacted for 3 hours. The reaction was cooled to 25C, followed by adding water (10 mL). The reaction was extracted with ethyl acetate (10 mL x 3). The organic phases were combined, dried over anhydrous sodium sulfate and concentrated under reduced pressure to give 2-(3,5-dimethylisoxazol-4-yl)acetonitrile (200 mg, as a yellow oil) with a yield of 71%. 1H NMR: (400 MHz, Methanol-d4) delta 3.67(s, 2H), 2.30(s, 3H), 2.28(s, 3H)., 19788-37-5

The synthetic route of 19788-37-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; GUANGDONG ZHONGSHENG PHARMACEUTICAL CO., LTD; WU, Lingyun; CHEN, Xiaoxin; ZHANG, Peng; LIU, Xing; ZHANG, Li; LIU, Zhuowei; CHEN, Shuhui; LONG, Chaofeng; (160 pag.)EP3299371; (2018); A1;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

946426-89-7, 5-Cyclopropyl-3-(2,6-dichlorophenyl)isoxazole-4-methanol is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Preparation 5 4-Bromomethyl-5-cyclopropyl-3-f2.6-dichloro-phenvD-isoxazoleTo a 0 C solution of (5-cyclopropyl-3-(2,6-dichloro-phenyl)-isoxazol-4-yl)-methanol (0.124 g,0.44 mmol) in dichloromethane (4 mL) is added phosphorous tribromide (0.261 g, 0.963 mmol). The ice bath is removed after 20 minutes and the reaction is allowed to stir for an additional twenty minutes at room temperature. The reaction mixture is quenched with pH 7 buffer and extracted with dichloromethane several times. The organic layers are combined, washed with brine, dried over sodium sulfate, filtered, and concentrated under reduced pressure to yield the title compound (0.124 g, 82%). 1H-NMR (400 MHz CDCl3) delta 7.45-7.33 (m, 3H), 4.20(s, 2H), 2.09 (m, IH), 1.27 (m, 2H), 1.16 (m, 2H).

946426-89-7, 946426-89-7 5-Cyclopropyl-3-(2,6-dichlorophenyl)isoxazole-4-methanol 45790382, aIsoxazoles compound, is more and more widely used in various fields.

Reference£º
Patent; ELI LILLY AND COMPANY; WO2007/92751; (2007); A2;,
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: To a suspension of 4-hydroxyquinolin-2(1H)-one (7, 1 mmol, 161 mg) in H2O:EtOH(1:1) (8 mL), DBU (20 mol%) was added. The reaction mixture was heated and stirred at 50 C for 15 min to dissolve the reactant. Then, aryl glyoxal monohydrates(1a-h, 1 mmol), 5-methylisoxazol-3-amine (6, 1 mmol, 98 mg) were added to the reaction mixture, which was stirred at the above-mentioned temperature for appropriate times as shown in Table 2. The progress of reaction was controlled by TLC using MeOH:CHCl3/1:10 as eluent. After completion of the reaction, the precipitate was filtered, washed with water and dried to give the desired products 8a-h in high yield (82-89%)., 1072-67-9

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

Reference£º
Article; Aslanpanjeh, Maryam; Poursattar Marjani, Ahmad; Khalafy, Jabbar; Etivand, Nasser; Research on Chemical Intermediates; vol. 46; 1; (2020); p. 165 – 177;,
Isoxazole – Wikipedia
Isoxazole | C3H3NO – PubChem

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
Isoxazole | C3H3NO – PubChem

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