Heterocyclic Building Blocks-Oxazolidine

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.

)._A solution of the solid from above (500 mg, 5.00 mmol), benzyl chloride (0.569 mL, 5.00 mmol), and TEA (0.69 mL, 5.00 mmol) in CHC13 (5.00 mL) was stirred at 60 C for 48 hours . EtOAc (50.0 mL) and 1M aq HCl (50.0 mL) were added. The aq phase was extracted with CHC13 (3X50 mL), and the combined organic phases were washed with brine (50 mL), dried over MgS04, filtered, and concentrated under reduced pressure to provide the title compound as a solid (0.894 g, 95%) 1H NMR (300 MHz, CDC13) delta 7.44-7.28 (m, 5H), 4.68 (s, 2H), 4.67 (s, 3H)., 2346-26-1

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

Reference£º
Patent; EPIGENETIX, INC.; ALBERT, Jeffrey, S.; JOHNSTONE, Shawn; JONES, Paul; WO2014/152029; (2014); A2;,
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153652-70-1, (4S,5R)-3-Benzoyl-2,2-dimethyl-4-phenyloxazolidine-5-carboxylic acid is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Solution OF 2-CHLOR-4, 6-DIPHENOXY-1, 3,5-triazine (CDPHT) (0. 3 g, 1 mmole) in 5 mi THF was mixed with N-methylmorpholine (0.11 ml, 1 mmole) for 30 minutes at temperature of 0-5C to obtain N- (4, 6- DIPHENOXY-1, 3, 5-triazine-2-yl)-N- methylmorpholine chloride. Then, phenyl isoserine derivative with the formula 4b, where R3= R4=CH3 (0.325 g, 1 mmol) was added and mixed for 12 hours. After N-METHYLMORPHOLINE HYDOCHLORIDE was filtered off, and solvent was evaporated it gave respective triazine ester of the formula 6b, where R3= R4=CH3, and R5=R6= OCEHG, with the quantitative yield. TLC: eluent CHCI3, RR0. 65 1H-NMR (CDCI3) : 6=1. 76 (s, 3H); 1.79 (s, 3H) ; 5.19 (d, J=8.0 Hz, 1H); 5.27 (d, J= 8. 0 Hz, 1H) ; 7.19-7. 22 (m, 2H); 7.40-7. 74 (m, 18 H) ppm] JR (KBr): 1780 [CM~1] The triazine ester, in the presence of magnesium bromide and PYROLIDINPYRIDINE, was coupled with protected Baccatin III of the generalized formula 3, where R2=Si (C2H5) 3. The product was chromatographically and SPECTRALLY identical to that described in the 11. Example.

153652-70-1, The synthetic route of 153652-70-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AGROPHARM S.A.; WO2004/56790; (2004); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

2346-26-1, Oxazolidine-2,4-dione is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

1.64 g (5.70 mmol) of 5-(naphth-1-yl)pent-4-yn-1-yl methanesulphonate, obtained in stage 3.2., and 0.72 g (7.1 mmol) of 1,3-oxazolidine-2,4-dione are dissolved in 9 ml of tetrahydrofuran. 1.3 g (11.4 mmol) of 1,1,3,3-tetramethylguanidine in solution in 3 ml of tetrahydrofuran are added. The mixture is heated at reflux overnight. 25 ml of ethyl acetate and 6 g of silica are added. The mixture is evaporated to dryness. The residue is purified by chromatography on silica gel, elution being carried out with a 90/10 and then 80/20 and 70/30 mixture of cyclohexane and of ethyl acetate, to produce 1.33 g of product in the form of a white solid. M.p. ( C.): 99-101 C.

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

Reference£º
Patent; SANOFI-AVENTIS; US2007/21426; (2007); 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.108149-63-9,(R)-tert-Butyl 4-(hydroxymethyl)-2,2-dimethyloxazolidine-3-carboxylate,as a common compound, the synthetic route is as follows.

a) (R)-2,2-Dimethyl-4-phenoxymethyl-oxazolidine-3-carboxylic acid tert-butyl ester To a stirred solution of tert-butyl (R)-4-(hydroxymethyl)-2,2-dimethyl-3- oxazolidinecarboxylate (400 mg; CAS 108149-63-9) in THF (20 ml) were added phenol (197 mg), triphenylphosphine (573 mg) and di-tert-butyl azodicarboxylate (488 mg). The resulting yellow solution was stirred at 70 0C for 18 h overnight, then concentrated in vacuo. The crude product was purified by column chromatography (SiO2; gradient: heptane/EtOAc 100:0 -> 70:30) to give (R)-2,2-dimethyl-4-phenoxymethyl-oxazolidine- 3-carboxylic acid tert-butyl ester (336 mg, 63%) as a colourless viscous oil. MS (ISP): 308.3 ([M+H]+))., 108149-63-9

The synthetic route of 108149-63-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; WO2008/92785; (2008); 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.695-53-4,5,5-Dimethyloxazolidine-2,4-dione,as a common compound, the synthetic route is as follows.

695-53-4, 13-1) Production of 5,5-dimethyl-3-(2-nitrobenzyl)oxazolidine-2,4-dione A mixture of 5,5-dimethyloxazolidine-2,4-dione (1.9 g, 15 mmol), 2-nitrobenzylchloride (2.6 g, 15 mmol), potassium carbonate (2.5 g, 18 mmol) and N, N-dimethylformamide (15 ml) was heated at 80C for 2 hours while stirring. After cooling, the reaction mixture was mixed with water and extracted with ethyl acetate, and the organic layer was washed with water (twice), then with saturated sodium chloride solution and dried with anhydrous magnesium sulfate. After concentrated under reduced pressure, the organic layer was mixed with hexane, and precipitated solid material was collected by filtration to obtain 5,5-dimethyl-3-(2-nitrobenzyl)oxazolidine-2,4-dione (3.7 g). Yield: 93% Properties: melting point 133.5-134.5C

695-53-4 5,5-Dimethyloxazolidine-2,4-dione 3081, aoxazolidine compound, is more and more widely used in various fields.

Reference£º
Patent; NIHON NOHYAKU CO., LTD.; EP1852425; (2007); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

2346-26-1, Oxazolidine-2,4-dione is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Reference Example 2 A mixture of 4-[3-(5-methyl-2-phenyl-4-oxazolyl)propionyl]cinnamaldehyde (3.60 g), 2,4-oxazolidinedione (1.58 g), piperidine (0.27 g) and acetic acid (30 ml) was heated under refluxing conditions for 6 hours. The reaction mixture was cooled; the resulting crystal of 5-[4-[3-(5-methyl-2-phenyl-4-oxazolyl)propionyl]cinnamylidene]-2,4-oxazolidinedione was collected by filtration and washed with ether-methanol. The filtrate and washings were combined together and concentrated under reduced pressure; chloroform was added to the residue., 2346-26-1

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

Reference£º
Patent; Takeda Chemical Industries, Ltd.; US5614544; (1997); 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.17016-83-0,(S)-4-Isopropyl-2-oxazolidinone,as a common compound, the synthetic route is as follows.

General procedure: In a round bottom flask dimethyl sulfoxide (50 ml) was added, followed by 1,3 dibromopropane (61.7 g, 306 mmol) and powdered potassium hydroxide (4.47 g, 80 mmol).[13] The reaction mixture was cooled to 15-20 C. To the cooled reaction mixture, was added (S)-4-phenyloxazolidin-2-one (10 g, 61.3 mmol) in 4 to 5 lots at an interval of 5 min each. The reaction mixture was stirred further at 15-20 C for 3-4h. Water (150 ml) was then added to the reaction mixture and it was extracted in dichloromethane (200 ml). The organic layer was concentrated on laboratory rotary evaporator. The resultant residue was purified on silica gel column using cyclohexane/ethyl acetate to get (1a) as colorless oil. Yield: 13.1 g (75%). 1b-1f were prepared in the same manneras 1a.

17016-83-0, As the paragraph descriping shows that 17016-83-0 is playing an increasingly important role.

Reference£º
Article; Nehate, Sagar P.; Godbole, Himanshu M.; Singh, Girij P.; Mathew, Jessy E.; Shenoy, Gautham G.; Synthetic Communications; vol. 48; 18; (2018); p. 2435 – 2440;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.497-25-6,Oxazolidin-2-one,as a common compound, the synthetic route is as follows.,497-25-6

General procedure: A Schlenk tube was charged with aryl bromide(1 mmol), oxazolidone(1.2 mmol), N,N-dimethylglycine(10.3mg, 0.1 mmol), recrystallized CuI(9.5mg, 0.05 mmol) and K2CO3(276mg, 2 mmol). The tube was evacuated and backfilled with argon(3 times) before dry DMF(0.5 ml) was added. The reaction mixture was stirred at 120 C until the corresponding aryl bromidewas completely consumed as monitored by TLC. The reaction mixture was extracted with ethyl acetate. The organic layer was washed with H2O and brine, and dried by Na2SO4. Removal of solvent in vacuo and purified by column chromatography on silica gel to provide the desired product.

The synthetic route of 497-25-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Li, Jiaojiao; Zhang, Yihua; Jiang, Yongwen; Ma, Dawei; Tetrahedron Letters; vol. 53; 31; (2012); p. 3981 – 3983;,
Oxazolidine – Wikipedia
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.95530-58-8,(R)-4-Isopropyloxazolidin-2-one,as a common compound, the synthetic route is as follows.,95530-58-8

To a mixture of ethyl 4-iodobenzoate (5.8 mL), (R)-4-isopropyloxazolidin-2-one (5 g), potassium carbonate (15 g) and copper (I) iodide (1.3 g) were added toluene (35 mL) and N,N’-dimethylethylenediamine (1.5 mL), and the mixture was refluxed for 8 hr. After cooling, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and the solvent was evaporated. The residue was dissolved in methanol (35 mL) and 1,4-dioxane (35 mL), 1N aqueous sodium hydroxide solution (70 mL) was added, and the mixture was stirred at room temperature overnight. 1N hydrochloric acid (70 mL) was added, and the mixture was filtered to give the title compound (9 g).

The synthetic route of 95530-58-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Mitsubishi Tanabe Pharma Corporation; EP2364975; (2011); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

875444-08-9, (4S,5R)-5-(3,5-Bis(trifluoromethyl)phenyl)-4-methyloxazolidin-2-one is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

875444-08-9, The chiral intermediate (4S,5R)-5-(3,5-bis(trifluoromethyl)phenyl)-4-methyloxazolidin-2-one (compound 11 in Scheme 3, prepared by procedure of WO 2007/005572) (28.0 g) is dissolved in DMF (300 mL) and cooled to – 15C. 2 M NaHMDS (39.2 mL, 1.05 eq) was then added over 1 h, followed by addition of the biaryl chloride 7 (Scheme 3) (28.0 g) in DMF (50 mL), maintaining the internal temperature below -10 C. The mixture was warmed to + 12 C and was aged until complete conversion took place. Then 5M HCl (35 mL) was added, followed by 160 mL of 10% IPAC/Heptanes and 340 mL of water, keeping the temperature between 10C and 20C throughout. The layers were cut and the organic layer was washed twice with 150 mL of 1/1 DMF/water followed by two 140 mL waterwashes. The organic layer was then removed under reduced pressure and the resulting residue was purified by flash chromatography (EtOAc/hexanes) to remove the excess oxazolidinone 11 (Scheme 3). The obtained colorless oil was then dissolved in refluxing heptanes (200 mL) and the solution was slowly cooled to -20 C. The resulting slurry was then stirred at -20 C for 2 hours and filtered. The filter cake was washed with cold heptanes and was then dried, yielding 44.0 g (88%) of the desired product of Formula IX (anacetrapib) as an amorphous material. The impurity (4S,5R)-5-(3,5-bis(trifluoromethyl)phenyl)-3-((5′-ethyl-4′-fluoro-2′-methoxy-4-(trifluoromethyl) biphenyl-2-yl)methyl)-4-methyloxazolidin-2-one (DMAP) (?3%), which is formed from 2′-(chloromethyl)-5-ethyl-4-fluoro-2-methoxy-4′-(trifluoromethyl)biphenyl (EBFCI) present in the starting material under the conditions described in Step 7, was detected in the product.

875444-08-9 (4S,5R)-5-(3,5-Bis(trifluoromethyl)phenyl)-4-methyloxazolidin-2-one 23583229, aoxazolidine compound, is more and more widely used in various fields.

Reference£º
Patent; LEK Pharmaceuticals d.d.; EP2468735; (2012); A1;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem