Potassium Hydroxide → 5-fluoro-3-(1,2,3,6-tetrahydropyridin-4-yl)-1H-indole

Participants

Reaction Steps

To a solution of 74 gm potassium hydroxide in 673 mL methanol were added 10.0 gm (74 mMol) 5-fluoroindole and 23.3 gm (151 mMol) 4-piperidone.HCl.H2O. The reaction mixture was stirred at reflux for 18 hours. The reaction mixture was diluted with 1.3 L of water and the resulting precipitate recovered by filtration and dried under reduced pressure to give 10.75 gm (67.2%) of 5-fluoro-3-[1,2,5,6-tetrahydro-4-pyridyl]-1H-indole as a yellow solid.

Provenance & Evidence