Water → 3-(1-Methyl-1,2,3,6-tetrahydropyridin-4-yl)-5-(trifluoromethyl)benzenamine

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Reaction Steps

Into a 100 mL round bottom flask was placed LAH (1.518 g, 40 mmol) and suspended in THF (30 mL). Flask placed into an ice bath. Tert-butyl 4-(3-amino-5-(trifluoromethyl)phenyl)-5,6-dihydropyridine-1(2H)-carboxylate (1.368 g, 4 mmol) is added to THF (10 mL) and this solution is in turn added dropwise to the LAH suspension at 0° C. 15 min after addition was complete, flask is equipped with reflux condensor and allowed to reflux 15 h with stirring. Work up: Water (1.5 g) is added dropwise, then 15% NaOH(aq)(w/w)(1.5 g), followed by water (3 g). White precipitate forms after 20 h of stirring, filtered solids, removed solvent under reduced pressure. No further purification done. LC-MS (+) shows mass 257 (M+H), as expected for C13H15F3N2, mw 256.27.

Provenance & Evidence