Trifluoroacetic acid → pyrrolidine-1-sulfonic acid 5-(6-chloro-1H-indol-2-yl)-pyridin-3-yl ester

Participants

Reaction Conditions

Reaction Steps

6-Chloro-2-[5-(pyrrolidine-1-sulfonyloxy)-pyridin-3-yl]-indole-1-carboxylic acid tert-butyl ester is dissolved in DCM (2 mL), and the mixture is cooled to 0° C. TFA (2 mL) is added and the mixture is stirred at room temperature for 1 h. Saturated sodium bicarbonate is then added and the mixture is extracted with DCM. The organic layer is dried over sodium sulfate and concentrated in vacuo to afford pyrrolidine-1-sulfonic acid 5-(6-chloro-1H-indol-2-yl)-pyridin-3-yl ester as an oil which is taken onto the next step without further purification. MS (ESI) m/z 376.2 (M+H)+.

Provenance & Evidence