Aluminum(III) Chloride → [3-(4-Bromo-phenyl)-3-(4-chloro-phenyl)-propyl]methyl-amine

HRID 45490Notes

Reaction equation

HRID 45490 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([C:14]2[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=2)[CH2:9][C:10]([NH:12][CH3:13])=O)=[CH:4][CH:3]=1.[H-].[Al+3].[Li+].[H-].[H-].[H-].[Cl-].[Al+3].[Cl-].[Cl-]>C(OCC)C>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([C:14]2[CH:15]=[CH:16][C:17]([Cl:20])=[CH:18][CH:19]=2)[CH2:9][CH2:10][NH:12][CH3:13])=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 6451240Aluminum(III) ChlorideHCID 21226445Aluminium lithium hydrideHCID 593319703-(4-Bromo-phenyl)-3-(4-chloro-phenyl)-N-methyl-propionamide

Product 1

HCID 59331923[3-(4-Bromo-phenyl)-3-(4-chloro-phenyl)-propyl]methyl-amineYield 62%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent2×

Procedure

Under a nitrogen atmosphere, the crude 3-(4-bromo-phenyl)-3-(4-chloro-phenyl)-N-methyl-propionamide was cooled to 0° C., lithium aluminum hydride (0.075 g, 1.97 mmol) and diethyl ether (3 ml) were added. With cooling, aluminum chloride (0.23 g, 1.69 mmol) was dissolved in diethyl ether (2 ml) and added. The reaction mixture was stirred for 16 hours, quenched with addition of water, basified (2N NaOH) and extracted with ethyl acetate. The organic layer was separated, dried (MgSO4), filtered and concentrated, the crude product was purified over Phenomenex_Strata_SCX column chromatography eluting with methanol followed by 2N ammonia in methanol to afford the desired product (0.254 g, 62% yield for steps 1D and 1E combined). LC/MS: (PS-B3) Rt 3.20 [M+H]+ 339.85.

Workup

  1. temperatureWith cooling
  2. additionadded
  3. customquenched with addition of water
  4. extractionextracted with ethyl acetate
  5. customThe organic layer was separated
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customthe crude product was purified over Phenomenex_Strata_SCX column chromatography
  10. washeluting with methanol

Sources & evidence

ORD record
ord-adf582af6b044b0ca46b074e6236599f
Source dataset
uspto-grants-2013_09
Patent number
US08541461B2

Reaction notes

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