Trifluoroacetic acid → HCID 9801660, compound

Participants

Reaction Steps

To a solution of 0.157 g (0.31 mmol) of the product of Example 229, {2-[4-(4-but-2-ynyloxy-benzenesulfonyl)-3-hydroxycarbamoyl-piperazin-1-yl]-2-oxo-ethyl}carbamic acid tert-butyl ester, in 4.0 mL of methylene chloride was added 1.0 mL of trifluoroacetic acid. The resulting solution was stirred at room temperature for 1 h and then reduced to dryness. The resulting residue was dissolved in ethyl acetate and washed with saturated aqueous sodium bicarbonate and then brine. The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo to furnish 0.121 g (95%) of 4-aminoacetyl-1-(4-but-2-ynyloxy-benzenesulfonyl)-piperazine-2-carboxylic acid hydroxyamide as a yellow solid. Electrospray Mass Spec: 411.1 (M+H)+.

Provenance & Evidence