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Lithium borohydride → (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-hydroxybutan-2-yl)piperidin-2-one

HRID 931893
Notes
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Reaction equation

HRID 931893 reaction equation
[CH2:1]([C@H:4]1[CH2:9][C@H:8]([C:10]2[CH:15]=[CH:14][CH:13]=[C:12]([Cl:16])[CH:11]=2)[C@@H:7]([C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)[N:6]([C@@H:24]([CH2:30][CH3:31])[C:25](OCC)=[O:26])[C:5]1=[O:32])[CH:2]=[CH2:3].[BH4-].[Li+]>CCOCC>[CH2:1]([C@H:4]1[CH2:9][C@H:8]([C:10]2[CH:15]=[CH:14][CH:13]=[C:12]([Cl:16])[CH:11]=2)[C@@H:7]([C:17]2[CH:18]=[CH:19][C:20]([Cl:23])=[CH:21][CH:22]=2)[N:6]([C@@H:24]([CH2:30][CH3:31])[CH2:25][OH:26])[C:5]1=[O:32])[CH:2]=[CH2:3]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 4148881Lithium borohydrideHCID 60154134(S)-Ethyl 2-((3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-2-oxopiperidin-1-yl)butanoate

Product 1

HCID 58573719(3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-hydroxybutan-2-yl)piperidin-2-one

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 256 mg (0.54 mmol) of (S)-ethyl 2-((3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-2-oxopiperidin-1-yl)butanoate (Example 9, Step B) in Et2O (5.5 mL) was added lithium borohydride of 90% purity (17.6 mg, 0.809 mmol) at 0° C. After being stirred at 0° C. for 10 min, the reaction was quenched (ice cold 10% citric acid), extracted (2×EtOAc) and washed (sat. aq. NaCl solution). The combined organic layers were washed with sat. NaCl solution, dried over Na2SO4, filtered and the filtrate was concentrated under reduced pressure. Purification by chromatography on silica gel (eluent 30% to 50% EtOAc/Hexanes, a gradient elution) provided the title compound.

Workup

  1. customthe reaction was quenched (ice cold 10% citric acid)
  2. extractionextracted (2×EtOAc)
  3. washwashed (sat. aq. NaCl solution)
  4. washThe combined organic layers were washed with sat. NaCl solution
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationthe filtrate was concentrated under reduced pressure
  8. customPurification by chromatography on silica gel (eluent 30% to 50% EtOAc/Hexanes
  9. washa gradient elution)

Sources & evidence

ORD record
ord-53692d98a55a4a958cf2b2fee87eecce
Source dataset
uspto-grants-2016_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09296736B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes