Diisopropylethylamine → (S)-tert-butyl 5-((S)-2-((R)-4-benzyl-2-oxooxazolidin-3-yl)-1-(3-chlorophenyl)-2-oxoethyl)-2,2-dimethylpyrrolidine-1-carboxylate

HRID 1480539ノート

反応式

HRID 1480539 の反応式
[CH2:1]([C@@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:23])[CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([Cl:22])[CH:17]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CCN(C(C)C)C(C)C.CO[CH:35]1[N:39]([C:40]([O:42][C:43]([CH3:46])([CH3:45])[CH3:44])=[O:41])[C:38]([CH3:48])([CH3:47])[CH2:37][CH2:36]1>C(Cl)Cl.Cl[Ti](Cl)(Cl)Cl>[CH2:1]([C@@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:23])[C@H:15]([C@H:35]1[N:39]([C:40]([O:42][C:43]([CH3:46])([CH3:45])[CH3:44])=[O:41])[C:38]([CH3:48])([CH3:47])[CH2:37][CH2:36]1)[C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([Cl:22])[CH:17]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

6

反応物 3

HCID 81531DiisopropylethylamineHCID 59564912HCID 59564912、化合物HCID 66845068HCID 66845068、化合物

生成物 1

HCID 66846240(S)-tert-butyl 5-((S)-2-((R)-4-benzyl-2-oxooxazolidin-3-yl)-1-(3-chlorophenyl)-2-oxoethyl)-2,2-dimethylpyrrolidine-1-carboxylate収率 62.9%

試薬・触媒・溶媒 2

HCID 24193Titanium Tetrachloride触媒HCID 6344Dichloromethane溶媒2 回

反応条件

温度
-78 °C

実験手順

A solution of (R)-4-benzyl-3-(2-(3-chlorophenyl)acetyl)oxazolidin-2-one (0.975 g, 2.96 mmol) in dry DCM (125 mL) was cooled to −78° C., and TiCl4 (3.10 mL, 3.10 mmol) was added. DIEA (0.566 mL, 3.25 mmol) was added to this stirring cold solution for 15 minutes. A solution of tert-butyl 5-methoxy-2,2-dimethylpyrrolidine-1-carboxylate (0.881 g, 3.84 mmol) in DCM (20 mL) was added to the cold mixture. The reaction was stirred for 15 minutes at −78° C. and then warmed to −10° C. (ice/acetone) and stirred for 3 hours. The reaction was quenched with NH4Cl, diluted with DCM (50 mL), water (50 mL), and the layers were separated. The aqueous layer was extracted with DCM (25 mL), dried (MgSO4) and concentrated to an oil. TLC (10% ethyl acetate/hexanes) shows desired product at Rf˜0.2. Purification by flash chromatography (5% ethyl acetate/hexanes-10% ethyl acetate/hexanes) gave (S)-tert-butyl 5-((S)-2-((R)-4-benzyl-2-oxooxazolidin-3-yl)-1-(3-chlorophenyl)-2-oxoethyl)-2,2-dimethylpyrrolidine-1-carboxylate (0.98 g, 1.86 mmol, 62.9% yield). HPLC, 254 nm, 100% purity, retention time=3.86 minutes.

後処理

  1. stirringstirred for 3 hours
  2. customThe reaction was quenched with NH4Cl
  3. additiondiluted with DCM (50 mL), water (50 mL)
  4. customthe layers were separated
  5. extractionThe aqueous layer was extracted with DCM (25 mL)
  6. dry with materialdried (MgSO4)
  7. concentrationconcentrated to an oil
  8. customPurification by flash chromatography (5% ethyl acetate/hexanes-10% ethyl acetate/hexanes)

出典と根拠

ORDレコード
ord-fb6d28890d424f60932955f9385096b9
出典データセット
uspto-grants-2016_08
特許番号
US09409886B2

反応ノート

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