Trifluoroacetic acid → 6,6-dimethyl-11-oxo-8-piperidin-4-yl-6,11-dihydro-5H-benzo[b]carbazole-3-carbonitrile

Participants

Reaction Steps

With the same condition as the method for synthesizing the Compound A8-1 (THF (0.5 mL) and TFA (0.5 mL) were added to 4-(3-cyano-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazol-8-yloxy)-piperidine-1-carboxylic acid tert-butyl ester (Compound A7-1, 35 mg, 0.072 mmol), and the mixture was stirred at room temperature until Compound A7-1 disappears. The reaction solution was concentrated under reduced pressure and the residue was desalinated by using anionic exchange resin PL StratoSpheres (trademark) PL-HCO3 MP to obtain the Compound A8-1 (37 mg, 76%)), the title compound was synthesized from the Compound B3-13-1.

Provenance & Evidence