Water → (3-{3-[4-Amino-3-(methoxycarbonyl)-benzoyl]-2-methylindolizin-1-yl}phenoxy)acetic acid

Participants

Reaction Steps

The solution of 3.68 g (6.65 mmol) of methyl 2-amino-5-({1-[3-(2-tert-butoxy-2-oxoethoxy)phenyl]-2-methylindolizin-3-yl}carbonyl)benzoate in 11 ml of trifluoroacetic acid and 35 ml of dichloromethane at ambient temperature for 4 hours. The reaction medium is poured into water and the mixture is extracted with dichloromethane. The organic phase is partially concentrated, and the yellow precipitate formed is filtered and washed with diisopropyl ether and then dried, to give 2.75 g (92%) of a yellow powder.

Provenance & Evidence