Trifluoroacetic anhydride → 2-[N-(5-bromo-2-benzyloxybenzyl)-N-ethylamino]-5-cyanopyridine

Participants

Reaction Steps

Trifluoroacetic anhydride (0.51 ml) was added dropwise to a mixture of 2-[N-(5-bromo-2-benzyloxybenzyl)-N-ethylamino]pyridine-5-carboxamide (1.05 g) in pyridine (0.58 ml) and THF (20 ml) at 20° C. The mixture was stirred at ambient temperature for 18 hours, diluted with ethyl acetate, washed with water, saturated aqueous NaHCO3 and brine, and dried (MgSO4). The solvent was evaporated and the residue purified by MPLC, eluting with dichloromethane/methanol mixtures (100:0 to 95:5) to give 2-[N-(5-bromo-2-benzyloxybenzyl)-N-ethylamino]-5-cyanopyridine (0.81 g) as a gum.

Provenance & Evidence