Water → methyl 9-bromo-1-isobutyl-2,3,4,5-tetrahydro-1H-1-benzoazonin-6-carboxylate

HRID 1928954Notes

Reaction equation

HRID 1928954 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[NH:13][CH2:12][CH2:11][CH2:10][CH2:9][C:8]([C:14]([O:16][CH3:17])=[O:15])=[CH:7][C:6]=2[CH:18]=1.O>ClCCCl>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[N:13]([CH2:5][CH:6]([CH3:18])[CH3:7])[CH2:12][CH2:11][CH2:10][CH2:9][C:8]([C:14]([O:16][CH3:17])=[O:15])=[CH:7][C:6]=2[CH:18]=1

Participants

4

Reactant 2

HCID 962WaterHCID 68649852methyl 9-bromo-2,3,4,5-tetrahydro-1H-1-benzoazonin-6-carboxylate

Product 1

HCID 68650366methyl 9-bromo-1-isobutyl-2,3,4,5-tetrahydro-1H-1-benzoazonin-6-carboxylateYield 181.2%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

To a solution of methyl 9-bromo-2,3,4,5-tetrahydro-1H-1-benzoazonin-6-carboxylate (2.0 g) in 1,2-dichloroethane (20 ml) were added isobutyl aldehyde (2.32 g) and triacetoxy sodium borohydride (4.11 g) and the mixture was stirred overnight. Water was added and the mixture was extracted with ethyl acetate, after which it was washed with aqueous saturated sodium bicarbonate solution and saturated brine, and dried with magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1) to give methyl 9-bromo-1-isobutyl-2,3,4,5-tetrahydro-1H-1-benzoazonin-6-carboxylate (2.14 g) as a yellow oily material.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washafter which it was washed with aqueous saturated sodium bicarbonate solution and saturated brine
  3. dry with materialdried with magnesium sulfate
  4. distillationThe solvent was distilled off under reduced pressure
  5. customthe resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1)

Sources & evidence

ORD record
ord-5b47539c559c4f41af17f2af0ed8cd31
Source dataset
uspto-grants-2012_05
Patent number
US08183273B2

Reaction notes

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