Aluminium lithium hydride → (RS)-1-[(3RS,4SR)-1-benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanol

HRID 1158645ノート

反応式

HRID 1158645 の反応式
[CH2:1]([N:8]1[CH2:12][CH:11]([C:13]2[CH:18]=[CH:17][C:16]([Cl:19])=[C:15]([Cl:20])[CH:14]=2)[CH:10]([C:21](=[O:23])[CH3:22])[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[H-].[H-].[H-].[Li+].[Al+3]>C1COCC1>[CH2:1]([N:8]1[CH2:12][CH:11]([C:13]2[CH:18]=[CH:17][C:16]([Cl:19])=[C:15]([Cl:20])[CH:14]=2)[CH:10]([CH:21]([OH:23])[CH3:22])[CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

参加物

4

反応物 2

HCID 21226445Aluminium lithium hydrideHCID 669997301-[(3RS,4SR)-1-Benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanone

生成物 1

HCID 66999712(RS)-1-[(3RS,4SR)-1-benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanol収率 31.1%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of 1-[(3SR,4RS) 1-benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanone (IX-1) (14.90 g, 0.043 mol) in THF (300 mL) at 0° C. were added portionwise LiAlH4 (2.05 g 0.051 mol). Stirring was continued for one hour, and the reaction mixture was carefully quenched by addition of aq. NH4Cl, concentrated under vacuo and the product extracted with EtOAC. The combined organic phases were dried on Na2SO4 and concentrated under vacuo. The two diastereoisomeres were separated by column chromatography (SiO2, EtOAc/H, 1:1) to yield (SR)-1-[(3SR,4RS)-1-benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanol (XIII-B-1) 4.69 g (31%) as a white solid ES-MS m/e: 350.2 (M+H+) and (RS)-1-[(3SR,4RS)-1-benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanol (XIII-A-1) 5.30 g (35%) as a white solid ES-MS m/e: 350.2 (M+H+).

後処理

  1. customthe reaction mixture was carefully quenched by addition of aq. NH4Cl
  2. concentrationconcentrated under vacuo
  3. extractionthe product extracted with EtOAC
  4. customThe combined organic phases were dried on Na2SO4
  5. concentrationconcentrated under vacuo
  6. customThe two diastereoisomeres were separated by column chromatography (SiO2, EtOAc/H, 1:1)

出典と根拠

ORDレコード
ord-51c14cdc6a324aaa94cb9d888a65c610
出典データセット
uspto-grants-2010_10
特許番号
US07812021B2

反応ノート

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