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Methanol → 7-[(R)-2-((E)-3-Hydroxy-4-phenyl-but-1-enyl)-6-oxo-piperidin-1-yl]-hept-5-ynoic acid methyl ester

HRID 2052930
Notes
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Reaction equation

HRID 2052930 reaction equation
[BH4-].[Na+].CO.[CH3:5][O:6][C:7](=[O:32])[CH2:8][CH2:9][CH2:10][C:11]#[C:12][CH2:13][N:14]1[C@@H:19](/[CH:20]=[CH:21]/[C:22](=[O:30])[CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[CH2:18][CH2:17][CH2:16][C:15]1=[O:31]>C(Cl)Cl>[CH3:5][O:6][C:7](=[O:32])[CH2:8][CH2:9][CH2:10][C:11]#[C:12][CH2:13][N:14]1[C:15](=[O:31])[CH2:16][CH2:17][CH2:18][C@@H:19]1/[CH:20]=[CH:21]/[CH:22]([OH:30])[CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 887MethanolHCID 4311764Sodium borohydrideHCID 690215987-[(R)-2-oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-hept-5-ynoic acid methyl ester

Product 1

HCID 113725147-[(R)-2-((E)-3-Hydroxy-4-phenyl-but-1-enyl)-6-oxo-piperidin-1-yl]-hept-5-ynoic acid methyl esterYield 78%

Reagents, catalysts & solvents 1

HCID 6344
Dichloromethane
Solvent

Procedure

Sodium borohydride (2 mg, 0.053 mmol), followed by MeOH (0.1 mL), was added to a solution of 7-[(R)-2-oxo-6-((E)-3-oxo-4-phenyl-but-1-enyl)-piperidin-1-yl]-hept-5-ynoic acid methyl ester (14 mg, 0.037 mmol) in CH2Cl2 (0.5 mL) at 0° C. The mixture was allowed to warm to rt. After 30 min at rt, the reaction was quenched with aqueous HCl (1.0 M, 1 mL) and extracted with EtOAc (3×5 mL). The combined organic phase was washed with brine (10 mL) then dried (Na2SO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on silica gel (CH2Cl2→2% MeOH/CH2Cl2, gradient) afforded 11 mg (78%) of the title compound.

Workup

  1. customthe reaction was quenched with aqueous HCl (1.0 M, 1 mL)
  2. extractionextracted with EtOAc (3×5 mL)
  3. washThe combined organic phase was washed with brine (10 mL)
  4. dry with materialthen dried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customPurification of the residue by flash column chromatography on silica gel (CH2Cl2→2% MeOH/CH2Cl2, gradient)

Sources & evidence

ORD record
ord-3e3bdc5ecb1241878cbee81710713029
Source dataset
uspto-grants-2008_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07326716B2

Reaction notes

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