Potassium Carbonate → (R)-1-(But-3-yn-1-yl)-2-methylpyrrolidine

HRID 1157718Notes

Reaction equation

HRID 1157718 reaction equation
[C:1]([C@@H:4]([C@H:6]([C:8](O)=O)O)O)(O)=O.[CH3:11][C@@H:12]1[CH2:16][CH2:15][CH2:14][NH:13]1.C1(C)C=CC(S(OCCC#C)(=O)=O)=CC=1.C(=O)([O-])[O-].[K+].[K+]>CC#N>[CH2:1]([N:13]1[CH2:14][CH2:15][CH2:16][C@H:12]1[CH3:11])[CH2:4][C:6]#[CH:8]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 2720203-Butynyl p-toluenesulfonateHCID 11858493(R)-2-methylpyrrolidine L-tartrate

Product 1

HCID 11367023(R)-1-(But-3-yn-1-yl)-2-methylpyrrolidine

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
85 °C

Procedure

To a sealed flask was added 2-(R)-methylpyrrolidine L-tartrate (21.1 g, 90 mmol), 3-butynyl p-toluenesulfonate (15.7 mL, 89 mmol), potassium carbonate powder (18.5 g, 134 mmol) and CH3CN (160 mL). The resulting mixture was heated to 85° C. for 24 hours and the reaction was monitored by GC for the complete consumption of the tosylate. The reaction mixture was cooled to room temperature and filtered; the wet cake was washed with CH3CN (40 mL). The combined filtrate was used in the next step without further processing.

Workup

  1. customthe reaction was monitored by GC for the complete consumption of the tosylate
  2. temperatureThe reaction mixture was cooled to room temperature
  3. filtrationfiltered
  4. washthe wet cake was washed with CH3CN (40 mL)

Sources & evidence

ORD record
ord-6851ec8ffaa04669862c0137638ef325
Source dataset
uspto-grants-2010_10
Patent number
US07807697B2

Reaction notes

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