Boron trifluoride etherate → 3-(1H-Indol-3-yl)propane-1,2-diamine

HRID 1379046Notes

Reaction equation

HRID 1379046 reaction equation
B(F)(F)F.CCOCC.[NH2:10][C@H:11]([C:22]([NH2:24])=O)[CH2:12][C:13]1[C:21]2[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=2)[NH:15][CH:14]=1.CSC.B.[OH-].[Na+]>O.O1CCCC1>[NH2:24][CH2:22][CH:11]([NH2:10])[CH2:12][C:13]1[C:21]2[C:16](=[CH:17][CH:18]=[CH:19][CH:20]=2)[NH:15][CH:14]=1

Participants

7

Reactant 4

HCID 8000Boron trifluoride etherateHCID 14798Sodium HydroxideHCID 439356L-TryptophanamideHCID 12423031(Dimethyl sulfide)trihydroboron

Product 1

HCID 408493-(1H-Indol-3-yl)propane-1,2-diamine

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

Boron trifluoride etherate (12.3 ml, 0.1 mmole) was added to a tetrahydrofuran (24.4 ml) solution of tryptophan amide (20.3 g, 0.1 mole) at room temperature with stirring. At reflux with constant stirring, borane methylsulfide (32.25 ml, 0.34 mole) was added dropwise. The reaction was heated at reflux with stirring for five hours. A tetrahydrofuran:water mixture (26 ml, 1:1) was carefully added dropwise. A sodium hydroxide solution (160 ml, 5N) was added and the mixture heated at reflux with stirring for sixteen hours.

Workup

  1. additionwas added dropwise
  2. temperatureThe reaction was heated
  3. temperatureat reflux
  4. stirringwith stirring for five hours
  5. temperaturethe mixture heated
  6. temperatureat reflux
  7. stirringwith stirring for sixteen hours

Sources & evidence

ORD record
ord-60fff0f3afee480790389fb5d0f39def
Source dataset
uspto-grants-1997_09
Patent number
US05670499

Reaction notes

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