Trifluoroacetic acid → HCID 90308925, compound

Participants

Reaction Conditions

Reaction Steps

A 40% methylamine-methanol solution (3 ml) was added to ethyl 4-(tert-butoxycarbonylamino)benzo[b]thiophene-6-carboxylate obtained in Example 22 (Step 3) (110 mg), and the reaction solution was stirred at 90° C. overnight. Trifluoroacetic acid (0.5 ml) was added to the resultant residue, and the reaction solution was stirred at room temperature for 15 minutes. Thereafter, the solvent was evaporated under vacuum, and the residue was purified by column chromatography on silica gel (developing solvent:hexane-ethyl acetate) to obtain 4-amino-N-methylbenzo[b]thiophene-6-carboxamide.

Provenance & Evidence