Day: September 7, 2020

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.

n-BuLi (2 M in hexane, 1.7 mL, 3.45 mmol, 1.5 eqv.) was added to a stirred suspension of methyltriphenylphosphonium bromide (1.23 g, 3.45 mmol, 1.5 eqv.) in dry THF (10 mL) under argon at 0 C dropwise over 5 min, and the resulting solution was allowed to stir for 20 min at 0 C. A solution of the aldehyde 4 (560 mg, 2.30 mmol) in THF (5 mL) was then added dropwise over 5 min with stirring at the same temperature. After 20 min, the solution was allowed to come to room temperature and stirred for another 4 h. The reaction mixture was quenched by addition of aq NH4Cl solution (3 mL) and then extracted with ethyl acetate (2 x 50 mL). The combined organic extract was washed successively with H2O (40 mL) and brine solution (40 mL) and then dried over MgSO4. It was then filtered, and the filtrate was concentrated under reduced pressure to leave the crude product which was purified by column chromatography over silica gel (EtOAc-PE, 1:19) to give the olefin 1b as a colourless liquid (410 mg, 74 %)., 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
Article; Chattopadhyay, Shital K.; Kundu, Indranil; Synthetic Communications; vol. 44; 14; (2014); p. 2112 – 2120;,
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.

General procedure: To a stirred solution of 6 (0.100 g, 0.433 mmol), appropriate substituted phenol (0.649 mmol) and PPh3 (0.182 g,0.693 mmol) in anhydrous toluene (5 mL) was added DIAD(0.14 mL, 0.693 mmol) at 80 C. After 3 h, EtOAc (40 mL)was added to the resulting solution. The organic layer was washed with 0.5 M aqueous NaOH (40 mL) and water (2 X40 mL), dried over Na2SO4, filtered and concentrated. The residue was purified by flash silica gel column chromatography eluting with Hexanes/EtOAc (9:1) or (95:5) to afford compounds 7a-s., 108149-63-9

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

Reference£º
Article; Andrade, Saulo F.; Campos, Edmar F.S.; Teixeira, Claudia S.; Bandeira, Cristiano C.; Lavorato, Stefania N.; Romeiro, Nelilma C.; Bertollo, Caryne M.; Oliveira, Monica C.; Souza-Fagundes, Elaine M.; Alves, Ricardo J.; Medicinal Chemistry; vol. 10; 6; (2014); p. 609 – 618;,
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 solution of tert-butyl (4R)-4-(hydroxymethyl)-2-methyl-1,3-oxazolidine-3-carboxylate (9.38 g, 43.17 mmol, 1.00 equiv), Cs2CO3 (28.1 g, 86.24 mmol, 2.00 equiv), and methyl prop-2-enoate (18.6 g, 216.05 mmol, 5.00 equiv) in ACN (80 mL) was stirred for 3 h at room temperature. The solids were filtered out and the residue was concentrated under vacuum to afford 9.92 g of the title compound as a crude yellow oil LCMS (ESI, m/z): 318.18 [M+H]+

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
Patent; Ribon Therapeutics Inc.; Vasbinder, Melissa Marie; Schenkel, Laurie B.; Swinger, Kerren Kalai; Kuntz, Kevin Wayne; (410 pag.)US2019/330194; (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 1 A mixture of (E)-4-[2-[5-methyl-2-(3-methylphenyl)-4-oxazolyl]ethoxy]cinnamaldehyde (1.20 g), 2,4-oxazolidinedione (0.525 g), piperidine (0.09 g) and ethanol (20 ml) was heated for 5 hours under reflux. The reaction mixture was poured into water, which was acidified with 2N HCl, followed by extraction with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4) and, then, concentrated. The concentrate was purified by means of a silica gel column chromatography. From the fractions eluted with chloroform-methanol (50:1) was obtained 5-[4-[2-[5-methyl-2-(3-methylphenyl)-4-oxazolyl]ethoxy]cinnamylidene]-2,4-oxazolidinedione (0.51 g, 34%). Recrystallization from dichloromethane-methanol gave pale yellow prisms, m.p.213-214 C.

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

Reference£º
Patent; Takeda Chemical Industries, Ltd.; US5665748; (1997); A;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

152305-23-2, (S)-4-(4-Aminobenzyl)oxazolidin-2-one is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(S)-4-(4-Aminobenzyl)-l,3-oxazolidin-2-one (IX) (100 g) was charged in water (400 ml, 4.0 volumes) and cone. HCl (200 ml, 2.0 volumes) was added at 25-30¡ãC. The solution was cooled to 5 to -10¡ãC and a solution of sodium nitrite (54 g, 1.5 equivalents) in water (400 ml, 4.0 volumes) was added whilst maintaining the temperature below -5¡ãC. After completion of the addition, the reaction mixture was stirred for 3 hours resulting in the formation of the diazonium chloride (XV) in solution.

152305-23-2, As the paragraph descriping shows that 152305-23-2 is playing an increasingly important role.

Reference£º
Patent; GENERICS [UK] LIMITED; MYLAN DEVELOPMENT CENTRE PRIVATE LIMITED; WO2009/44211; (2009); A1;,
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, Serinol derivative 5 (65 mg, 0.28 mmol) was dissolved in dry DMSO (3 mL) and treated with NaH (5 mg, 60% dispersion in mineral oil, 0.21 mmol) and mesylate 39 (100 mg, 0.14 mmol) was added sequentially. The reaction immediately changed color from nearly colorless to orange red. The reaction was stirred at room temperature for 16 h, and was then quenched by the ice and diluted with ethyl acetate. The two layers were separated and the aqueous layer extracted with ethyl acetate (5 15 mL). The combined organic layers were dried (Na2SO4) and concentrated in vacuo. Purification by flash column chromatography (70:30 petroleum ether/EtOAc) yielded the serinol ether 40 (105 mg, 65%) as colorless oil:

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

Reference£º
Article; Das, Shyamsundar; Induvadana, Boddeti; Ramana; Tetrahedron; vol. 69; 7; (2013); p. 1881 – 1896;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

95715-86-9, Methyl (R)-N-Boc-2,2-dimethyloxazolidine-4-carboxylate is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

95715-86-9, In stageA harvesting (R) -2,2- dimethyl – oxazolidine-3,4-dicarboxylic acid 3-t- butyl ester 4-methyl ester (11.4g, 44.0mmol) was dissolved in dichloromethane (100mL), added at -78 Diisopropyl aluminum hydride (1.5M in toluene, 66mL). The temperature was raised to room temperature and stirred for 18 hours. After completion of the reaction, methanol (20 mL) and sodium hydroxide (1N, 200mL) was slowly added to the organic solution is then extracted with methylene chloride, dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure and the residue was separated by column chromatography the title compound were harvested (9.7g, 95%).

The synthetic route of 95715-86-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; LG Life Sciences Ltd.; Park, Heui Sul; Koo, Sun Young; Kim, Hyoung Jin; Lee, Sung Bae; Kwak, Hyo Shin; Artemov, V.; Kim, Soon Ha; (34 pag.)CN105636956; (2016); A;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem

131685-53-5, (R)-(-)-4-Benzyl-3-propionyl-2-oxazolidinone is a oxazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a tetrahydrofuran solution (12.0 mL) containing (S) -4-benzyl-3-propionyloxazolidin-2-one (a1) (1.12 g, 4.81 mmol) was added sodium bis (trimethylsilyl ) Amide in tetrahydrofuran (1.0 M, 9.6 mL, 9.61 mmol) was added dropwise. After stirring the reaction mixture at -78 C. for 15 minutes, a solution of (2E, 4E) -1-bromohexa-2,4-diene (b1) (1.55 g, 9.61 mmol) and tetrabutylammonium iodide (177 mg, 0.481 mmol) was added, the temperature was raised to room temperature, and the mixture was stirred for 1 hour. Saturated ammonium chloride aqueous solution was added to the reaction system at 0 C. to stop the reaction, ethyl acetate was added and the organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The organic layers were combined, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure to obtain a crude product. The resulting crude product was purified by column chromatography to give (S) -3 – ((R, 4E, 6E) -2-methylocta-4,6-dienoyl) -4- benzyloxazolidin- (1.31 g, 87%).

131685-53-5, The synthetic route of 131685-53-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; TOKYO UNIVERSITY OF SCIENCE FOUNDATION; JAPANESE FOUNDATION FOR CANCER RESEARCH; SHIINA, ISAMU; YAMORI, TAKAO; (60 pag.)JP6143266; (2017); B2;,
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.

NaH (265 mg, 6.63 mmol) was added to a yellow solution of (S)-1-Boc-2,2-dimethyl-4-hydroxymethyloxazolidine (AstaTech Inc., Bristol, Pa.) (1 g, 4.19 mmol) in THF (10 ml). Then the mixture was stirred for 15 min at ambient temperature. The Methyliodid (323 muL, 5.19 mmol) was added to the yellow suspension and the mixture was stirred for 2 h 30 at rt. Then water was added to quench the reaction. The solvent was removed. The residue was purified by flash chromatography (DCM/MeOH: 5%?10% MeOH) to give the title compound (1.013 g, 94%). ESI-MS: 246.1 [M+H]+ (LC-MS 1); 1H NMR (400 MHz, ) delta ppm 1.48 (s, 9H) 1.53 (br. s., 6H) 3.30 (m, 1H) 3.36 (s, 3H) 3.41-3.63 (m, 2H) 3.88-4.00 (m, 2H)

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
Patent; NOVARTIS AG; CARAVATTI, Giorgio; FAIRHURST, Robin Alec; FURET, Pascal; STAUFFER, Frederic; SEILER, Frank Hans; MCCARTHY, Clive; RUEEGER, Heinrich; US2013/225574; (2013); A1;,
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

With key building block 6 in hand, its nitroaldol (Henry) reaction with nitromethane was examined (Table 1). LiAlH418- TBAF19- as well as t-BuOK20-catalyzed Henry reactions led to nitro alcohols 12 and 13 with low diastereoselectivity, reflecting that the existing stereogenic center is too far away from the newly created one to exert appreciable asymmetric induction (Table 1, entries 1-3).21 An obvious way of resolving this problem was the introduction of additional chiral information, i.e. application of a chiral catalyst. In fact double stereodifferentiation using Shibasaki’s well established heterobimetallic (,S)-BINOL catalyst 1422 (5 mol%, THF, -40 C, 3 d) led to 12 with high diastereoselectivity albeit in low yield (Table 1, entry 4).Recently, other highly efficient chiral catalysts for asymmetric Henry reactions have been developed. Thus, Corey23 and Maruoka24 have utilized chiral quaternary ammonium fluorides as catalysts while Trost25 has presented a dinuclear zinc catalyst. Salen-cobalt(II) complexes have been used by Yamada whereas J¡ãrgensen and Evans have introduced bis(oxazoline)-coprhoer(II) complexes. The latter seemed to be the catalysts of choice, at least for aliphatic aldehydes, with respect to attainable yields and degree of stereoselectivity. EPO Table 1. Diastereoselective Henry Reaction of Aldehyde 6 with Nitromethaneyield ratio0 entry catalyst conditions(%)a 12:131 LiAlH4 THF, rt 53 56:442 TBAF THF, rt 33 43:573 r-BuOK t- 72 23:77BuOH/THF,00C4 14 THF, -40 C 45 98:25 {Cu[(+> EtOH, rt 87 92:815]} (OAc)26 (CuK-)- EtOH, rt 85 9:9115]}(OAc)27 {Cu[(+> EtOH, rt 94 97:316]}(OAc)28 (Cu[(-)- EtOH, rt 91 8:9216I)(OAc)2a isolated yield b determined by HPLC analysis of crude reaction mixtures EPO Indeed application of Evans’ bis(oxazoline) copper(II) acetate-based catalysts {Cu[(+)- 15]}(OAc)2 and in particular {Cu[(+)-16]}(OAc)2 (5 mol%, EtOH, rt, 5 d) gave the desired nitro alcohol 12 both with high diastereoselectivity and in high yield (Table 1 , entries 5 and 7). Finally, to obtain selectively diastereomer 13, aldehyde 6 was reacted with nitromethane in the presence of the enantiomeric catalysts {Cu[(-)-15]}(OAc)2 and {Cu[(-)-16]} (OAc)2 respectively. In these cases slightly lower stereoselectivities and yields were observed reflecting a mismatched pairing (Table 1, entries 6 and 8)., 147959-19-1

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

Reference£º
Patent; LUDWIG-MAXIMILIANS-UNIVERSITAET MUENCHEN; WO2006/94770; (2006); A2;,
Oxazolidine – Wikipedia
Oxazolidine | C3H7NO – PubChem