3-Boc-2,2-dimethyloxazolidine-4-carboxaldehyde, (R)-(+)- → (S)-4-[4-(4-chloro-benzoyl)-piperidin-1-ylmethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

HRID 434299

反応式

HRID 434299 の反応式
[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH:13]=O)[CH2:11][O:10][C:9]1([CH3:16])[CH3:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].[Cl:17][C:18]1[CH:23]=[CH:22][C:21]([C:24]([CH:26]2[CH2:31][CH2:30][NH:29][CH2:28][CH2:27]2)=[O:25])=[CH:20][CH:19]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>O1CCCC1>[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13][N:29]2[CH2:30][CH2:31][CH:26]([C:24](=[O:25])[C:21]3[CH:20]=[CH:19][C:18]([Cl:17])=[CH:23][CH:22]=3)[CH2:27][CH2:28]2)[CH2:11][O:10][C:9]1([CH3:16])[CH3:15])=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

5

反応物 3

HCID 1787923-Boc-2,2-dimethyloxazolidine-4-carboxaldehyde, (R)-(+)-HCID 27771154-(4-Chlorobenzoyl)PiperidineHCID 5049666Sodium triacetoxyborohydride

生成物 1

HCID 68809159(S)-4-[4-(4-chloro-benzoyl)-piperidin-1-ylmethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of (R)4-formyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (0.5 g, 2.18 mmol) in tetrahydrofuran (15 ml) is added (4-chloro-phenyl)-piperidin-4-yl-methanone (0.49 g, 2.18 mmol) and sodium triacetoxyborohydride (0.69 g, 3.27 mmol), and the reaction mixture stirred for 3.5 hours at ambient temperature. The solvent is evaporated and the residue partitioned between ethyl acetate (50 ml) and saturated sodium bicarbonate solution (50 ml). The ethyl acetate is dried over magnesium sulphate and evaporated. The crude product is purified by flash silica chromatography (ethyl acetate:hexane, 1:1 elution) to afford (S)-4-[4-(4-chloro-benzoyl)-piperidin-1-ylmethyl]-2,2-dimethyl-oxazoldine-3-carboxylic acid tert-butyl ester, [MH]+437.2.

後処理

  1. customThe solvent is evaporated
  2. customthe residue partitioned between ethyl acetate (50 ml) and saturated sodium bicarbonate solution (50 ml)
  3. dry with materialThe ethyl acetate is dried over magnesium sulphate
  4. customevaporated
  5. customThe crude product is purified by flash silica chromatography (ethyl acetate:hexane, 1:1 elution)

出典と根拠

ORDレコード
ord-289e5a0a2c844c5689bd9fe851d1b3ea
出典データセット
uspto-grants-2003_12
特許番号
US06670379B2

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