Trifluoroacetic acid → 1-({1-[(6-Methylpyridin-3-yl)carbonyl]azetidin-3-yl}carbonyl)-1,4-diazepane

Participants

Reaction Steps

To a stirred solution of tert-butyl 4-({1-[(6-methylpyridin-3-yl)carbonyl]azetidin-3-yl}carbonyl)-1,4-diazepane-1-carboxylate (455 mg, 1.13 mmol) in DCM (10 mL) was added TFA (440 μL, 5.65 mmol) and stirred at room temperature for 24 hours. The reaction was re-charged with TFA (0.5 mL, 6.5 mmol) and the reaction stirred for a further 5 hours until consumption of starting materials seen by TLC. Volatiles were removed at reduced pressure and the crude product shaken with Ambersep 900-OH resin in DCM (20 ml) for 2 hours. The resin was removed by filtration and the washings concentrated at reduced pressure to give the title compound (302 mg, 89%).

Provenance & Evidence