Trifluoroacetic acid → Indoline-3(R,S)-carboxylic acid (N-methyl)amide

Participants

Reaction Steps

3 ml of a 25% solution of trifluoroacetic acid in methylene chloride are added to a solution of 216 mg of 1-(tert-butoxycarbonyl)indoline-3(R,S)-carboxylic acid (N-methyl)amide in 1 ml of methylene chloride at 0° C., while stirring. After 90 min, the mixture is allowed to warm to room temperature and stirring is continued for 2 h. Concentration of the mixture and purification of the crude product over 50 g of silica gel (mobile phase K) gives the title compound: Rf (P)=0.52.

Provenance & Evidence