Month: August 2020

497-25-6, Oxazolidin-2-one is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,497-25-6

A 48 mL pressure vessel containing 2-bromo-4-fluorobenzonitrile (1.00 g, 5.00 mmol), 2-oxazolidone (0.390 g, 4.50 mmol), K2CO3 (0.970 g, 7.0 mmol) and xantphos (0.231 g, 0.40 mmol) in dioxane (10 mL) was degassed with argon for 15 min. Pd2 dba3 (0.140 g, 0.15 mmol) was introduced and then the reaction mixture was heated at 70 C. for 18 h. The mixture was cooled, diluted with dioxane, and then filtered through Celite. The resulting mixture was concentrated in vacuo and subjected to column chromatography on silica gel with hexanes:ethyl acetate (1:1) to (3:7) gradient as the eluent to afford the title compound as a white solid (0.460 g, 50% yield): 1H NMR (400 MHz, CDCl3) ? ppm: 7.73 (1H, dd, J=5.8, 8.6 Hz), 7.43 (1H, dd, J=2.5, 9.6 Hz), 7.11 (1H, ddd, J=2.5, 7.5, 8.7 Hz), 4.60 (2H, t, J=7.1 Hz), 4.29 (2H, t, J=7.1 HJz); LCMS (+ESI, M+H+) m/z 207.

As the paragraph descriping shows that 497-25-6 is playing an increasingly important role.

Reference£º
Patent; Naidu, B. Narasimhulu; Banville, Jacques; Beaulieu, Francis; Connolly, Timothy P.; Krystal, Mark R.; Matiskella, John D.; Ouellet, Carl; Plamondon, Serge; Remillard, Roger; Sorenson, Margaret E.; Ueda, Yasutsugu; Walker, Michael A.; US2005/267105; (2005); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

139009-66-8, (S)-N-Boc-2,2-dimethyloxazolidine-4-carboxylic Acid is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A solution ofcarboxylic acid (1 mmol), EDC (1.1 mmol) and HOBT (1.1 mmol) in CH2Cl2(20 mL) was stirred at room temperature the starting material disappeared. The reaction was monitored by TLC. Thesolvent was eliminated under reduced pressure, and the residue wasco-distilled three times with dry toluene to obtain benzotriazoleesters I and II. These compounds were dissolved in anhydrousTHF (5 mL) and stored under argon before the next reaction. Completelyanhydrous conditions were crucial for attaining good yields.

139009-66-8, The synthetic route of 139009-66-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Morales-Serna, Jose Antonio; Sauza, Alejandro; Padron De Jesus, Gabriela; Gavino, Ruben; Garcia De La Mora, Gustavo; Cardenas, Jorge; Tetrahedron Letters; vol. 54; 52; (2013); p. 7111 – 7114;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.152305-23-2,(S)-4-(4-Aminobenzyl)oxazolidin-2-one,as a common compound, the synthetic route is as follows.

EXAMPLE 1 Ethyl-3-[2-(1,3-dioxo-2,3-dihydro-1H-2-isoindoleyl)ethyl]-5-[(4S)-2-oxo-1,3-oxazolan-4-ylmethyl]-1H-2-indole carboxylate (VII) Part A: (4S)-4-(4-aminobenzyl)-1,3-oxazolan-2-one of the formula (II) (200 g, 1.04 moles) was dissolved in methanol (600 ml) and water (900 ml) and cooled to 5-10¡ã C., then concentrated HCl (272 ml) was added dropwise to avoid heat generation and stirring was continued for 10 minutes. To this mixture sodium nitrite (90 g, 1.25 moles) solution in water (600 ml) was added slowly at -5 to 0¡ã C. After the addition, the solution was maintained under stirring at the same temperature for 30 minutes; EXAMPLE 9 Ethyl-3-[2-(1,3-dioxo-2,3-dihydro-1H-2-isoindoleyl)ethyl]-5-[(4S)-2-oxo-1,3-oxazolan-4-ylmethyl]-1H-2-indole carboxylate (VII) Part A: (4S)-4-(4-aminobenzyl)-1,3-oxazolan-2-one of the formula (II) (50 g, 0.26 moles) was dissolved in methanol (150 ml) and water (225 ml) and cooled to 5-10¡ã C., then conc. HCl (100 ml) was added dropwise to avoid temperature rise, and the mixture was stirred for 10 minutes. To this mixture sodium nitrite (36 g, 0.52 moles) solution in water (150 ml) was added slowly at -5 to 0¡ã C. After addition, the solution was maintained under stirring at the same temp for 30 minutes; EXAMPLE 10 Ethyl-3-[2-(1,3-dioxo-2,3-dihydro-1H-2-isoindoleyl)ethyl]-5-[(4S)-2-oxo-1,3-oxazolan-4-ylmethyl]-1H-2-indole carboxylate (VII) Part A: (4S)-4-(4-aminobenzyl)-1,3-oxazolan-2-one of the formula (II) (10 g, 0.052 moles) was dissolved in methanol (30 ml) and water (45 ml) and cooled to 5-10¡ã C., then concentrated HCl (13.6 ml) was added dropwise to avoiding heating and the mixture was stirred for 10 minutes. To this mixture, sodium nitrite (4.5 g, 0.065 moles) solution in water (30 ml) was added slowly at -5 to 0¡ã C. After the addition the solution was maintained under stirring at the same temperature for 30 minutes.

152305-23-2, The synthetic route of 152305-23-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Aminul, Islam; Chandan, Bhar; Sahadev, Katam; US2005/245585; (2005); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2346-26-1,Oxazolidine-2,4-dione,as a common compound, the synthetic route is as follows.

Into a 100 mL three neck round-bottom flask, were placed oxazolidine-2,4-dione (515 mg, 5.096 mmol, 1 equiv.), LiCl (648 mg, 15.3 mmol, 3 equiv.) and THF (30 mL). The reaction was purged with an inert atmosphere of nitrogen. The mixture was then added t-BuLi (9.6 mL, 15.3 mmol, 1.6M) dropwise with stirring at -78 C. The resulting solution was stirred for 30 min at -78. 1-(6-(8-Fluoronaphthalen-2-yl)-2-methoxypyridin-3-yl)-2-methylpropan-1-one (500 mg, 1.546 mmol, 0.3 equiv.)/THF (3 mL) was added to above solution at -78 C. The resulting solution was stirred for 30 min at -78 C. and 1 hrs at room temperature. The reaction progress was monitored by TLC/LCMS (DCM/MeOH=20:1). The reaction was then quenched by the addition of 3 mL of NH4Cl (aquous). The reaction was extracted with ethyl acetate and concentrated under vacuum. The residue was applied onto a silica gel column with DCM/MeOH (5:95) to yield 5-(1-(6-(8-fluoronaphthalen-2-yl)-2-methoxypyridin-3-yl)-1-hydroxy-2-methylpropyl)oxazolidine-2,4-dione as a white solid. Mass spectrum (ESI, m/z): Calculated for C23H21FN2O5, 425.1 (M+H), found 425.1.

2346-26-1, 2346-26-1 Oxazolidine-2,4-dione 97389, aoxazolidine compound, is more and more widely used in various.

Reference£º
Patent; Janssen Pharmaceutica NV; Zhang, Xuqing; Macielag, Mark J.; (179 pag.)US2019/47959; (2019); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2346-26-1,Oxazolidine-2,4-dione,as a common compound, the synthetic route is as follows.

Example 7 A mixture of 6-(5-methyl-2-phenyl-4-oxazolylmethoxy)-2-benzofurancarbaldehyde (1.70 g), 2,4-oxazolidinedione (1.55 g), pyrrolidine (0.365 g) and ethanol (40 ml) was heated under refluxing conditions for 3 hours. The reaction mixture was poured over water; the resulting crystals were collected by filtration. The crystals were dissolved in tetrahydrofuran (100 ml); after palladium-carbon (0.40 g) was added, the mixture was subjected to catalytic reduction at room temperature under an atmospheric pressure of 1 atm. After the catalyst was filtered off, the filtrate was concentrated under reduced pressure; the residue was subjected to silica gel column chromatography. From the fraction eluted with methanolchloroform (2:98, v/v), crystals of 5-[6-(5-methyl-2-phenyl-4-oxazolylmethoxy)-2-benzofuranylmethyl]-2,4-oxazolidinedione (0.14 g, 6.6%) were obtained, which was then recrystallized from dichloromethane-methanol to yield colorless prisms having a melting point of 172 to 173 C. Elemental analysis for C23 H18 N2 O6: Calculated: C, 66.03; H, 4.34; N, 6.70 Found: C, 65.95; H, 4.31, N, 6.71

2346-26-1, The synthetic route of 2346-26-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Takeda Chemical Industries, Ltd.; US5723479; (1998); A;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

147959-19-1, (S)-tert-Butyl 2,2-dimethyl-4-(2-oxoethyl)oxazolidine-3-carboxylate is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

acid [1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-amide To a cooled solution of (S)-2,2-dimethyl-4-(2-oxo-ethyl)-oxazolidine-3-carboxylic acid t-butyl ester (2.05 g, 8.43 mmol) in dry tetrahydrofuran (25 mL) was added 1.4M methyl magnesium bromide in diethyl ether (6.02 mL) at -78 C. The mixture was stirred at -78 C. for 30 min and then warmed to -5 C. The mixture was extracted with diethyl ether and ammonium chloride solution. The organic layer was dried and concentrated. The crude mixture was purified by ISCO flash chromatography (0 to 60% ethyl acetate/hexanes) to give two fractions. The first fraction afforded (S)-4-((S)-2-hydroxy-propyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid t-butyl ester as a colorless oil (870 mg): 1H NMR (300 MHz, CDCl3) delta ppm 1.20 (d, J=6.0 Hz, 3H), 1.42-1.60 (m, 1H), 1.50 (s, 12H), 1.55 (s, 3H), 1.68-1.88 (m, 1H), 3.66 (d, J=8.8 Hz, 1H), 3.69-3.80 (m, 1H), 3.94-4.08 (m, 1H), 4.17-4.30 (m, 1H), 4.62 (br. s., 1H); The second fraction afforded (S)-4-((R)-2-hydroxy-propyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid t-butyl ester as a white solid (740 mg): 1H NMR (300 MHz, CDCl3) delta ppm 1.22 (d, J=6.0 Hz, 3H), 1.49 (s, 12H), 1.58 (br. s., 3H), 1.75-1.90 (m, 2H), 2.56 (br. s., 1H), 3.75-3.93 (m, 2H), 3.95-4.05 (m, 1H), 4.03-4.20 (m, 1H).

147959-19-1, 147959-19-1 (S)-tert-Butyl 2,2-dimethyl-4-(2-oxoethyl)oxazolidine-3-carboxylate 10586317, aoxazolidine compound, is more and more widely used in various.

Reference£º
Patent; Berthel, Steven Joseph; Brinkman, John A.; Hayden, Stuart; Haynes, Nancy-Ellen; Kester, Robert Francis; McDermott, Lee Apostle; Qian, Yimin; Sarabu, Ramakanth; Scott, Nathan Robert; Tilley, Jefferson Wright; US2009/264445; (2009); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2346-26-1,Oxazolidine-2,4-dione,as a common compound, the synthetic route is as follows.

WORKING EXAMPLE 29 In substantially the same manner as in Working Example 11, 3-methoxy-4-[1-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]cinnamaldehyde was condensed with 2,4-oxazolidinedione. The condensate was subjected to catalytic hydrogenation to yield 5-[3-[3-methoxy-4-[1-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]phenyl]propyl]-2,4-oxazolidinedione. NMR(delta ppm in CDCl3): 1.73(3H,d,J=6.5 Hz), 1.7-2.1(4H,m), 2.28(3H,s), 2.59(2H,t,J=7 Hz), 3.85(3H,s), 4.82(1H,dd,J=7&4.5 Hz), 5.32(1H,q,J=6.5 Hz), 6.59(1H,dd,J=8&2 Hz), 6.68(1H,d,J=2 Hz), 6.78(1H,d,J=8 Hz), 7.35-7.5(3H,m), 7.95-8.1(2H,m), 8.66(1H,br s).

2346-26-1, As the paragraph descriping shows that 2346-26-1 is playing an increasingly important role.

Reference£º
Patent; Takeda Chemical Industries, Ltd.; US5932601; (1999); A;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.147959-19-1,(S)-tert-Butyl 2,2-dimethyl-4-(2-oxoethyl)oxazolidine-3-carboxylate,as a common compound, the synthetic route is as follows.

To a solution of (ethoxycarbonylmethylene) triphenylphosphorane (6.45 g, 18.51 mmol) in dry THF (30 mL) was added a solution of the above crude aldehyde (3.0 g, 12.34 mmol) in dry THF (25 mL). The reaction mixture was refluxed for 12 h. It was then concentrated and purified by silica gel column chromatography using petroleum ether/EtOAc (8.5:1.5) as eluent to afford the alpha,beta-unsaturated olefin 10 (3.5 g, 80%, after two steps) as a pale yellow liquid; (c 1.2, CHCl3). IR (neat): numax 3384, 2931, 1696, 1595, 1298, 982 cm-1. 1H NMR (200 MHz, CDCl3): delta 1.22 (t, J = 7.20 Hz, 3H), 1.40 (s, 9H), 1.48 (s, 3H), 1.54 (s, 3H), 2.35-2.66 (m, 2H), 3.59-3.68 (m, 1H), 3.83-3.90 (m, 2H), 4.12 (q, J = 7.15 Hz, 2H), 5.79 (d, J = 15.60 Hz, 1H), 6.82 (m, 1H). 13C NMR (50 MHz, CDCl3): delta 14.2, 26.7, 27.3, 28.4, 35.6, 56.1, 60.2, 66.8, 80.3, 94.0, 123.7, 128.9, 144.6, 166.2. ESI[MS](m/z): 336.12 [M++Na]. Anal. Calcd for C16H27NO5: C, 61.32; H, 8.68; N, 4.47%. Found: C, 61.48; H, 8.55; N, 4.51%.

147959-19-1, The synthetic route of 147959-19-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Show, Krishanu; Upadhyay, Puspesh K.; Kumar, Pradeep; Tetrahedron Asymmetry; vol. 22; 11; (2011); p. 1234 – 1238;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

108149-63-9, (R)-tert-Butyl 4-(hydroxymethyl)-2,2-dimethyloxazolidine-3-carboxylate is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

108149-63-9, General procedure: To a stirred solution of 35 (0.300g, 1.30mmol), appropriate hydroxypyridine (0.247g, 2.60mmol) and PPh3 (0.681g, 2.60mmol) in anhydrous THF (15mL) was added DIAD 95% (0.54mL, 2.60mmol) at 80C. After 3h, the mixture was concentrated under reduced pressure and EtOAc (100mL) was added. The organic layer was extracted with cold 0.1M aqueous HCl (2¡Á40mL). 1 M aqueous NaOH (60mL) was added to the aqueous layer and the resulting mixture was extracted with EtOAc (2¡Á100mL). The organic layer was dried over Na2SO4, filtered and concentrated. The residue was purified by flash silica gel column chromatography eluting with Hexanes/EtOAc (7:3). 4.10.1 1,1-Dimethylethyl (S)-2,2-dimethyl-4-[[(3-pyridyl)oxy]methyl]-3-oxazolidinecarboxylate (15) Yellow oil. 53% yield: [alpha]D25+58 [alpha]D25+58 (c 3.46, CH2Cl2); IR v 3058, 2979, 2936, 2880, 1689, 1575, 1477, 1427, 1385, 1376, 1365cm-1; 1H NMR (200MHz, CDCl3) delta (ppm): 8.29-8.18 (m, 2H, Ar), 7.25-7.13 (m, 2H, Ar), 4.23-3.87 (m, 5H, CHN, CH2O, CH2OAr), 1.58, 1.53, 1.46 (s, 15H, CH3, C(CH3)3); 13C NMR (50MHz, CDCl3) delta (ppm) major rotamer: 154.57 (Ar), 152.21 (C=O), 142.07, 138.32, 123.71, 120.69 (Ar), 93.49 (C), 80.58 (C(CH3)3), 66.17, 65.00 (CH2O, CH2OAr), 55.79 (CHN), 28.29 (C(CH3)3), 27.41, 24.12 (CH3). HRMS (m/z): [MH+] calcd for C16H25N2O4, 309.1809; found, 309.1818.

As the paragraph descriping shows that 108149-63-9 is playing an increasingly important role.

Reference£º
Article; Andrade, Saulo F.; Oliveira, Barbara G.; Pereira, Larissa C.; Ramos, Jonas P.; Joaquim, Angelica R.; Steppe, Martin; Souza-Fagundes, Elaine M.; Alves, Ricardo J.; European Journal of Medicinal Chemistry; vol. 138; (2017); p. 13 – 25;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

108149-63-9, (R)-tert-Butyl 4-(hydroxymethyl)-2,2-dimethyloxazolidine-3-carboxylate is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

After a mixture of NaBH4 (5.2 g, 139 mmol) and LiCl (5.9 g,139 mmol) in dry EtOH (30 mL) was stirred for 30 min at 0 C, compound20 (6.0 g, 23 mmol) dissolved in 15 mL of dry THF wasadded. The resulting mixture was warmed to room temperatureand stirred for 12 h. The precipitate was filtered over Celite andwashed with EtOH. The filtrate was then evaporated and partitionedbetween ethyl acetate and brine. After the aqueous layerwas extracted with ethyl acetate (5), the organic layer was driedover Na2SO4 and concentrated in vacuo to afford the intermediatealcohol as a yellow oil. To a reaction mixture of dry THF (100 mL)containing 11 g (42 mmol) of PPh3, 8.2 g (56 mmol) of phthalimide,and 6.6 g (28 mmol) of the yellow oil, 22.7 mL (40% in toluene,50 mmol) of diethyl azodicarboxylate dissolved in dry THF(20 mL) was added dropwise while stirring in an ice bath. After12 h at ambient temperature, the solvent was evaporated, and theresulting residue was purified by column chromatography (hexane/ethyl acetate = 3:1) to afford 21 as white crystals (5.4 g, 53%)., 108149-63-9

108149-63-9 (R)-tert-Butyl 4-(hydroxymethyl)-2,2-dimethyloxazolidine-3-carboxylate 11053464, aoxazolidine compound, is more and more widely used in various.

Reference£º
Article; Nagaoka, Hikaru; Nishiwaki, Hisashi; Kubo, Takuya; Akamatsu, Miki; Yamauchi, Satoshi; Shuto, Yoshihiro; Bioorganic and Medicinal Chemistry; vol. 23; 4; (2015); p. 759 – 769;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem