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【结 构 式】

【分子编号】28685

【品名】(3R)-4,4,4-trifluoro-3-hydroxybutyric acid

【CA登记号】

【 分 子 式 】C4H5F3O3

【 分 子 量 】158.0771096

【元素组成】C 30.39% H 3.19% F 36.06% O 30.36%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(VI)

1) Synthesis of Butanol (I): 1a) The reduction of 4,4,4-trifluoro-2-oxobutyric acid ethyl ester (III) with NaBH4 in dichloromethane gives 4,4,4-trifluoro-2-hydroxybutyric acid ethyl ester (IV), which is hydrolyzed with NaOH in ethanol, yielding the corresponding acid (V). The optical resolution of (V) with 1(S)-phenylethylamine in hot ethanol affords the 3(R)-hydroxy enantiomer (VI) (1,3), which is reduced with NaBH4 and BF3 ethearate in THF to provide 4,4,4-trifluorobutane-1,3(R)-diol (VII). Finally, this compound is monotosylated by means of tosyl chloride and DMAP in pyridine to afford intermediate (I). 1b) The digestion of 4,4,4-trifluoro-3-hydroxybutyric acid ethyl ester (IV) with Novozym in a phosphate buffer gives the corresponding (R)-enantiomer (VIII), which is reduced with NaBH4 in ethanol, yielding 4,4,4-trifluorobutane-1,3(R)-diol (VII) (4). Finally, this compound is monotosylated by means of tosyl chloride as before to give butanol (I).

1 Castaner, J.; Sorbera, L.A.; Rabasseda, X.; Befloxatone. Drugs Fut 1999, 24, 10, 1057.
2 Koenig, J.-J.; Schoofs, A.; Jarreau, F.-X.; Rovei, V. (Laboratoires Delalande); 3-Aryl oxazolidinones, process for their preparation and their therapeutical use. EP 0424243; EP 0424244; EP 0428421; JP 1992502333; JP 1992502334; JP 1992502335; US 5036090; US 5036091; US 5171747; US 5196543; WO 9105775 .
3 Jarreau, F.-X.; Koenig, J.-J.; Rovei, V. (Laboratoires Delalande); 3-Aryl-oxazolidinone derivs., process for their preparation and their use in therapeutics. EP 0511031; FR 2675504; JP 1993112542; US 5264443 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 28681 (3R)-4,4,4-trifluoro-3-hydroxybutyl 4-methylbenzenesulfonate C11H13F3O4S 详情 详情
(III) 25432 ethyl 4,4,4-trifluoro-3-oxobutanoate 372-31-6 C6H7F3O3 详情 详情
(IV) 28683 ethyl 4,4,4-trifluoro-3-hydroxybutanoate 372-30-5 C6H9F3O3 详情 详情
(V) 28684 4,4,4-trifluoro-3-hydroxybutyric acid C4H5F3O3 详情 详情
(VI) 28685 (3R)-4,4,4-trifluoro-3-hydroxybutyric acid C4H5F3O3 详情 详情
(VII) 28686 (3R)-4,4,4-trifluoro-1,3-butanediol C4H7F3O2 详情 详情
(VIII) 28687 (3R)-4,4,4-Trifluoro-3-hydroxybutanoic acid ethyl ester 85571-85-3 C6H9F3O3 详情 详情
Extended Information