Trifluoroacetic acid → 4-[({(2S,4S)-1-[(1-carbamimidoyl-4-piperidinyl)carbonyl]-4-[4-(methylsulfonyl)-1-piperazinyl]-2-pyrrolidinyl}carbonyl)amino]benzoic acid bis(trifluoroacetate)

Participants

Reaction Steps

To a solution of the compound prepared in Example 8 (0.11 g, 0.13 mmol) in dichloromethane (15 mL) at 0° C. was added trifluoroacetic acid (0.5 mL). The reaction was warmed to room temperature and stirred for 18 h. The solvent and excess trifluoroacetic acid was removed under reduced pressure. The solid was dissolved in water and lyophilized to dryness to afford the title compound (0.030 g, 40%) as an off-white solid.

Provenance & Evidence