Hydrochloric Acid → 2-Butyl-8-hydroxy-3-oxo-2,3,5,6,7,8-hexahydroisoquinoline-4-carbonitrile

HRID 489300Notes

Reaction equation

HRID 489300 reaction equation
[CH2:1]([N:5]1[C:14](=[O:15])[C:13]([C:16]#[N:17])=[C:12]2[C:7]([C:8](=[O:18])[CH2:9][CH2:10][CH2:11]2)=[CH:6]1)[CH2:2][CH2:3][CH3:4].[BH4-].[Na+].Cl>C1COCC1>[CH2:1]([N:5]1[C:14](=[O:15])[C:13]([C:16]#[N:17])=[C:12]2[C:7]([CH:8]([OH:18])[CH2:9][CH2:10][CH2:11]2)=[CH:6]1)[CH2:2][CH2:3][CH3:4]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 4311764Sodium borohydrideHCID 222664802-Butyl-3,8-dioxo-2,3,5,6,7,8-hexahydroisoquinoline-4-carbonitrile

Product 1

HCID 222665102-Butyl-8-hydroxy-3-oxo-2,3,5,6,7,8-hexahydroisoquinoline-4-carbonitrileYield 75.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

2-Butyl-3,8-dioxo-2,3,5,6,7,8-hexahydroisoquinoline-4-carbonitrile (7-011) (10 mg, 0.04 mmol) was dissolved in THF (1 mL), and to the reaction mixture was added sodium borohydride (2.1 mg, 0.056 mmol), and the reaction mixture was stirred at room temperature for 10 min. To the reaction mixture was added diluted hydrochloric acid (1 mol/L, 3 mL), and the reaction mixture was extracted with ethyl acetate (10 mL), washed with brine (5 mL), dried over anhydrous magnesium sulfate, and evaporated under reduced pressure. The obtained crystalloid residue was recrystallized from methylene chloride to give 2-butyl-8-hydroxy-3-oxo-2,3,5,6,7,8-hexahydroisoquinoline-4-carbonitrile (7-013) (7.4 mg, 75%) as a white crystal.

Workup

  1. extractionthe reaction mixture was extracted with ethyl acetate (10 mL)
  2. washwashed with brine (5 mL)
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customevaporated under reduced pressure
  5. customThe obtained crystalloid residue was recrystallized from methylene chloride

Sources & evidence

ORD record
ord-ea657da50f8340c4aa23af9d67fcec5e
Source dataset
uspto-grants-2005_12
Patent number
US06977266B2

Reaction notes

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