Heterocyclic Building Blocks-isoxazole

1750-42-1, Isoxazol-3-amine is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a solution of 1 mmol aldehyde, 3 volume of acetonitrile and 1 equivalent volume of aminewere added to 0.6 equivalent of quinoline derivatives and 1% (v/v) formic acid. The reaction mixturewas stirred at higher temperature (75 C). The reaction was monitored by TLC (eluent: hexaneisomeric mixture:acetone). If the product precipitated, it was filtered, washed with hexane, and dried.If the reaction mixture was homogeneous, it was evaporated to dryness and was purified by columnchromatography (eluent: hexane:acetone from 20:1 to 4:1, v/v). The crude product was crystallizedfrom hexane/ethyl-acetate. The molecular structures were determined by means of 1D and 2D-NMRtechnologies (see Supplementary Materials), 1750-42-1

Big data shows that 1750-42-1 is playing an increasingly important role.

Reference£º
Article; Kanizsai, Ivan; Madacsi, Ramona; Hackler, Laszlo; Gyuris, Mario; Szebeni, Gabor J.; Huzian, Orsolya; Puskas, Laszlo G.; Molecules; vol. 23; 8; (2018);,
Isoxazole – Wikipedia
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.19788-37-5,4-(Chloromethyl)-3,5-dimethylisoxazole,as a common compound, the synthetic route is as follows.

To a stirred solution of 4-Hydroxy-2,6-dimethyl-benzoic acid methyl ester (12) (100 mg, 0.556 mmol) in DMF (2 mL), K2C03 (153 mg, 1.111 mmol) and 4-Chloromethyl-3,5- dimethyl-isoxazole (4) (0.07 mL, 0.556 mmol) were added and the reaction was stirred at RT for 16 hours. The reaction mixture was diluted with ethyl acetate, washed with water and brine, dried over sodium sulfate and concentrated. The crude was purified by column chromatography (silica, gradient: 20-30% EtOAc in Hexane) to afford the Intermediate 13 130 mg, 80%) as off white solid.

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; THE BROAD INSTITUTE, INC.; THE GENERAL HOSPITAL CORPORATION; INSTITUTO CARLOS SLIM DE LA SALUD; BURNS, Sean, M.; WAGNER, Bridget, K.; VETERE, Amedeo; (189 pag.)WO2018/175324; (2018); A1;,
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Isoxazole | C3H3NO – PubChem

3405-77-4, 5-Methylisoxazole-3-carboxylic acid is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a 0¡ã C. solution of (054) and 5-methyl-isoxazole-3-carboxylic acid (009) (127 mg, 1.0 mmol), HOBT (135 mg, 1.0 mmol) and HBTU (350 mg, 1.0 mmol) in tetrahydrofuran (100 mL) was added a solution of N,N-diisopropylethylamine (0.5 mL) in tetrahydrofuran (2 mL). The mixture was stirred at room temperature for 5 hours. It was then diluted with ethyl acetate (200 mL) and washed with saturated aqueous sodium bicarbonate (2.x.10 mL) and brine (10 mL). The organic layers were dried over sodium sulfate and filtered through Celite-545, the solvents were removed under reduced pressure and the residue was purified by HPLC (aqueous ammonium acetate and acetonitrile) to provide (055) (40 mg) which was characterized by LC/MS (LCRS (MH) m/z: 576.27); >80percent proteasome CT-L inhibition at 20 mg/kg PO.

3405-77-4, As the paragraph descriping shows that 3405-77-4 is playing an increasingly important role.

Reference£º
Patent; Proteolix, Inc.; US2007/105786; (2007); A1;,
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42831-50-5,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.42831-50-5,5-Methylisoxazole-4-carboxylic acid,as a common compound, the synthetic route is as follows.

The 5-methylisoxazole-4-carboxylic acid (1) (1 g, 7.86 mmol) inSOCl2 (3 mL) was heated at 50 C until compound 1 disappeared inTLC. After reaction was terminated, the mixture was cooled toambient temperature and solvent was evaporated under reducedpressure. 5-methylisoxazole-4-carbonyl chloride, a crude yellow oil(2) (96%)was used for the next step without additional purification;1H NMR (400 MHz, DMSO) d 8.77 (1H, s), 2.64 (3H, s).

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

Reference£º
Article; Im, Daseul; Jung, Kyungjin; Yang, Songyi; Aman, Waqar; Hah, Jung-Mi; European Journal of Medicinal Chemistry; vol. 102; (2015); p. 600 – 610;,
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1072-67-9, 5-Methylisoxazol-3-amine is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A mixture of 45 N-isoxazolyl enaminone 1 (1.0mmol, 0.800g), aryl glyoxal monohydrates 2 (1.0mmol, 0.552g) and 4-amino-3-methyl-5-styrylisoxazoles 320h,23 (1.0mmol, 0.727g) in 4.5mL 46 water and 18 AcOH 0.5mL was refluxed at 100C for 1h. After completion of the reaction (monitored by TLC), the mixture was cooled to room temperature and poured into ice-cold water. The precipitate that formed was filtered off, washed with ice cold water and the crude product was purified by recrystallization from methanol to give pure bis-isoxazolyl amino dihydro-1H-indol-4(5H)-ones 42 4., 1072-67-9

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

Reference£º
Article; Nagi Reddy, Modugu; Praveen Kumar, Pittala; Tetrahedron Letters; vol. 58; 51; (2017); p. 4790 – 4795;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.19788-37-5,4-(Chloromethyl)-3,5-dimethylisoxazole,as a common compound, the synthetic route is as follows.

The allyl alcohol (20 mg, 0.035 mmol, Example 952) was dissolved in THF (1.00 rnL) and cooled to 0 C. Sodium hydride (60% dispersion; 840 rng, 0.350 rnmoi) was added and the mixture was stirred for 30 minutes. 4-(chloromethvi)-3.5-dimethviisoxazole (0022 mL. 0.175 rnrnoi) was then addedand the resulting mixture was stirred for 4,5 hours, Three more aliquol of reagents were added and the slurry was stirred at room temperature for 4.5 days. Thereaction was quenched with water and acidified with IN HC1 to pH5. The mixture was extracted with ethyl acetate (2 x 30 mL). The combined organiclayers were washed with brine (1 x 20 mL) and dried over magnesium sulfate.The crude material was purified by reverse-phase preparative HPLC using aPhenomenex Luna column. 10 micron. C8(2), 100 A. 150x 30mm. 0.1% TFA inCH3CN/H20, gradient 50% to 80% over 25 mm to provide (IS,3R,6],7R,8E)- 15Wspiro [naphthaIene 1,22-[2Oioxa[ 131 thia[ 1, i4ldiazatetracycio[1 47.203?6.0?924ipentacosa[8, 16,1 8,24itetrae nj-IS-one 13,13-dioxide (10mg, 0.015 mmol, 42 /yleId). ?HNMR (400MHz. CDCIs) oe 816 (s, 1 H), 7.71 (d, J=8.4 Hz, 1 H), 7.30 (s, I H), 7.18 (dd. 3=8.4, 2.3 Flz. I H), 7.09 (d. J::::2.3 Hz. I H), 695 (s, 2 Fl), 572 (dt, j:::16,O Hz, 4.7 Hz, I H),5-46 (dd, J=158, 8.4 Hz, I H), 4.65 (d, J=12. 1 Hz, 1 H), 4,13-426 (m, 1 H). 4.11 (s, 2 H), 4.03 (d, J:::12 1 Hz, I H). 396 (d, j:::14.7 Hz, 1 H), 3.59-3.71 (m, 2 H),3.19-3.30 (m, I H), 3.16 (d, J=14.3 Hz, 1 H), 2.86-2.98 (rn, 1 H), 2.66-2.84 (rn,H), 2.42-2.58 (in, 2 H), 2.40 (s, 3 H), 2.32 (s, 3 H), 2.08-2.22 (in, 3 H), 1.85-2.07(iii. 4 H), 1.75-185 (iii. 1 H), 1.65-1.74 (iii. 1 H), 1.50-1.64 (in. 1 H), 1.38-147(m. 2 H). rn/z (ESI, +ve ion) 680.3 (M+H)t, 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; AMGEN INC.; BROWN, Sean P.; BEDKE, David Karl; DEGRAFFENREID, Michael R.; FU, Jiasheng; LI, Zhihong; GONZALEZ LOPEZ DE TURISO, Felix; GONZALEZ BUENROSTRO, Ana; GRIBBLE, Jr., Michael W.; JOHNSON, Michael G.; KOHN, Todd J.; LI, Kexue; LI, Yunxiao; LIZARZABURU, Mike Elias; REW, Yosup; TAYGERLY, Joshua; WANG, Yingcai; YAN, Xuelei; YU, Ming; ZHU, Jiang; ZANCANELLA, Manuel; JIAO, Xian Yun; ZHU, Liusheng; WANG, Xianghong; MEDINA, Julio C.; DUQUETTE, Jason A.; HOUZE, Jonathan B.; VIMOLRATANA, Marc; CARDOZO, Mario G.; CHENG, Alan C.; (2426 pag.)WO2017/147410; (2017); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.51135-73-0,Ethyl 5-methylisoxazole-4-carboxylate,as a common compound, the synthetic route is as follows.

51135-73-0, EXAMPLE 4 Preparation of 5-Methylisoxazole-4-Carboxylic Acid A two-necked flask fitted with mechanical stirrer and a horizontal condenser for distillation was charged with 40.0 g of crude Ethyl-5-methylisoxazole-4-carboxylate and 44 g of 60% sulfuric acid and the mixture was heated to 85 C. with continuous distillation of ethanol from the reaction product. After four hours of heating at 85 C., TLC showed the complete disappearance of the upper spot of ester. The mixture was allowed to cool in the refrigerator and the solid acid was filtered (16.5 g) Filtrate kept at room temperature for second crop. Acid was crystallized in 60 mL 2% acetic acid-Toluene to obtain about 99.9% pure acid (9.5 g). Mother liquor of the final crystallization was kept for second crop. Crystallization was accomplished by: The crude acid was taken in 2% acetic acid-toluene mixture and heated for 30 minutes. Brown oil was separated at the bottom of the flask. The clear organic phase was neatly transferred and kept for crystallization.

The synthetic route of 51135-73-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Ray, Anup Kumar; Patel, Hiren Kumar V.; Patel, Mahendra R.; US2003/139606; (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.19788-37-5,4-(Chloromethyl)-3,5-dimethylisoxazole,as a common compound, the synthetic route is as follows.

General procedure: The corresponding alkyl halide reagent (1mmol) was added to a mixture of selenourea (1.1mmol) (compounds 1a-j) or thiourea (compounds 2a-j) in absolute ethanol (20mL). The mixture was stirred at reflux, room temperature or 0C for 0.5-6h. The product was isolated by filtration or by rotatory evaporation of the solvent under vacuum and purified by recrystallization or washing. 4.1.11 (3,5-Dimethylisoxazol-4-yl)methyl carbamimidoselenoate hydrochloride (1i); Conditions: 2.5 h at reflux. After this time, the mixture was filtered and the solvent was removed under vacuum by rotatory evaporation. The brown powder was washed with acetone (25mL). Yield: 76%; mp: 168-170C. 1H NMR (400MHz, DMSO-d6): delta 2.23 (s, 3H, C3-CH3), 2.40 (s, 3H, C5-CH3), 4.41 (s, 2H, -CH2-), 9.50ppm (bs, 4H, NH2+NH+HCl). 13C NMR (100MHz, DMSO-d6): delta 10.7 ((C5)-CH3), 11.8 ((C3)-CH3), 19.5 (-CH2-), 110.6 (C4), 160.1 (C5), 166.5 (C3), 167.7ppm (Se-C-(NH)(NH2)). IR (KBr): nu 3220-3100 (s; N-H, N-H2), 1655cm-1(s, C=N). MS (m/z (% abundance)): 228(13), 213(22), 190(24), 156(43), 110(98), 68(100), 43(100). Elemental analysis calculated (%) for C7H11N3OSe HCl: C: 31.30, H: 4.50, N: 15.64; found: C: 30.94, H: 4.59, N: 15.53.

19788-37-5, As the paragraph descriping shows that 19788-37-5 is playing an increasingly important role.

Reference£º
Article; Alcolea, Veronica; Plano, Daniel; Karelia, Deepkamal N.; Palop, Juan Antonio; Amin, Shantu; Sanmartin, Carmen; Sharma, Arun K.; European Journal of Medicinal Chemistry; vol. 113; (2016); p. 134 – 144;,
Isoxazole – Wikipedia
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14678-02-5, 5-Amino-3-methylisoxazole is a Isoxazoles compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(a) N-(3-methyl-5-isoxazolyl)-4-bromobenzenesulfonamide 4-brombenzenesulfonyl chloride (solid) was added, in five portions, to a solution of 3-methyl-5-aminoisoxazole (3.82 g, 40 mmol) in dry pyridine (30 ml). This was stirred at room temperature for 3 h and the pyridine was removed under reduced pressure. The residue was dissolved in THF (300 ml) and a 5% NaOH solution (100 ml) was added. Stirring continued for 1 h at room temperature. The THF was removed under reduced pressure and the resultant residue was neutralized to pH 2 using concentrated hydrochloric acid. This was extracted with ethyl acetate (3*200 ml) and the combined organic layer was dried over MgSO4 and concentrated. The crude product was recrystallized using hexane/ethyl acetate giving N-(3-methyl-5-isoxazolyl)-4-bromobenzenesulfonamide (9.2 g, 72% yield).

14678-02-5, The synthetic route of 14678-02-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Chan, Ming Fai; Kogan, Timothy; Verner, Erik Joel; Kois, Adam; Balaji, Vitukudi Narayanaiyengar; US2002/95041; (2002); A1;,
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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.

General procedure: To 4-amino-3-methyl-5-styrylisoxazoles 7 [18h,20] (1.0 mmol, 0.750 g) in 0.5 mL of AcOH and 4.5 mL of water, dimedone 8 (1.0 mmol, 0.525 g) was added and the reaction mixture refluxed at 100 C for 10 min, followed by the addition of aryl glyoxal monohydrates 9 (1.0 mmol, 0.569 g) and 5-amino-3-methylisoxazole 10 (1 mmol, 0.367 g) and the reaction continued for another 50 min. After completion of the reaction (monitored by TLC), the mixture was cooled to room temperature and poured into ice-cold water. The precipitate that formed was filtered off, washed with ice cold water and the crude product was purified by recrystallization from methanol to give pure bis-isoxazolopyrroloquinolines 11.

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

Reference£º
Article; Rayudu, Sri Venkateswarlu; Karmakar, Dipankar; Kumar, Pramod; Tetrahedron Letters; vol. 60; 36; (2019);,
Isoxazole – Wikipedia
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