Potassium Carbonate → 3-(4-Methyl-1-piperazine)propan-1-ol

HRID 723495Notes

Reaction equation

HRID 723495 reaction equation
Br[CH2:2][CH2:3][CH2:4][OH:5].[CH3:6][N:7]1[CH2:12][CH2:11][NH:10][CH2:9][CH2:8]1.C(=O)([O-])[O-].[K+].[K+]>C(O)C>[OH:5][CH2:4][CH2:3][CH2:2][N:10]1[CH2:11][CH2:12][N:7]([CH3:6])[CH2:8][CH2:9]1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 123083-Bromo-1-propanolHCID 531671-Methylpiperazine

Product 1

HCID 792083-(4-Methyl-1-piperazine)propan-1-ol

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 3-bromopropanol (20 ml), N-methylpiperazine (29 ml), potassium carbonate (83 g) and ethanol (200 ml)was stirred and heated to reflux for 20 hours. The mixture was cooled to ambient temperature and filtered. The filtrate was evaporated and the residue was triturated under diethyl ether. The resultant mixture was filtered and the filtrate was evaporated. The residue was purified by distillation at about 60–70° C. under about 0.2 mm Hg to give 1-(3-hydroxypropyl)-4-methylpiperazine (17 g); NMR Spectrum: (CDCl3) 1.72 (m, 2H), 2.3 (s, 3H), 2.2–2.8 (m, 8H), 2.6 (t, 2H), 3.8 (t, 2H), 5.3 (br s, 1H).

Workup

  1. temperatureheated
  2. temperatureto reflux for 20 hours
  3. filtrationfiltered
  4. customThe filtrate was evaporated
  5. customthe residue was triturated under diethyl ether
  6. filtrationThe resultant mixture was filtered
  7. customthe filtrate was evaporated
  8. distillationThe residue was purified by distillation at about 60–70° C. under about 0.2 mm Hg

Sources & evidence

ORD record
ord-4c66373c9b734cb2b039461063da7a96
Source dataset
uspto-grants-2006_11
Patent number
US07141577B2

Reaction notes

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