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Phenethyl bromide → 2-(3,4-Dimethoxyphenyl)-N-(2-phenylethyl)ethan-1-amine--hydrogen bromide (1/1)

HRID 46773
Notes
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Reaction equation

HRID 46773 reaction equation
[CH2:1]([NH2:13])[CH2:2][C:3]1[CH:12]=[CH:11][C:8]([O:9][CH3:10])=[C:5]([O:6][CH3:7])[CH:4]=1.[CH:14]1[CH:19]=[CH:18][C:17]([CH2:20][CH2:21][Br:22])=[CH:16][CH:15]=1>CC(C)=O>[BrH:22].[CH2:21]([NH:13][CH2:1][CH2:2][C:3]1[CH:12]=[CH:11][C:8]([O:9][CH3:10])=[C:5]([O:6][CH3:7])[CH:4]=1)[CH2:20][C:17]1[CH:18]=[CH:19][CH:14]=[CH:15][CH:16]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 7666Phenethyl bromideHCID 8421Homoveratrylamine

Product 1

HCID 30486862-(3,4-Dimethoxyphenyl)-N-(2-phenylethyl)ethan-1-amine--hydrogen bromide (1/1)Yield 44.5%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Conditions

Temperature
125 °C

Procedure

A mixture of 10 g of homoveratrylamine and 12 g of β-phenethyl bromide was stirred for 15 minutes at 125° C. in a bath and after cooling the mixture to 60° C., 30 ml of acetone were added. The mixture was iced and vacuum filtered and the recovered precipitate was dissolved in 250 ml of methanol. The solution was concentrated to 50 ml and 400 ml of ethyl acetate were added thereto. The mixture was concentrated to 200 ml, was iced and vacuum filtered to obtain 12.5 g of raw product. The latter was crystallized from isopropanol to obtain 9 g of N-phenethyl-3,4-dimethoxyphenethylamine hydrobromide in the form of colorless crystals melting at 180° C.

Workup

  1. temperatureafter cooling the mixture to 60° C.
  2. filtrationvacuum filtered
  3. dissolutionthe recovered precipitate was dissolved in 250 ml of methanol
  4. concentrationThe solution was concentrated to 50 ml and 400 ml of ethyl acetate
  5. additionwere added
  6. concentrationThe mixture was concentrated to 200 ml
  7. filtrationvacuum filtered
  8. customto obtain 12.5 g of raw product
  9. customThe latter was crystallized from isopropanol

Sources & evidence

ORD record
ord-8fad7de4d05543a687b763c106462129
Source dataset
uspto-grants-1979_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US04175136

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes