Trifluoroacetic acid → HCID 18331440, compound

Participants

Reaction Steps

A mixture of the compound (73 mg) obtained in Example 507 and trifluoroacetic acid (5 ml) was stirred at room temperature for 1 h and concentrated under reduced pressure. The resulting residue was purified by basic silica gel column chromatography (eluent, methylene chloride:methanol=95:5) to give 34.5 mg of the titled compound (yield, 67%).

Provenance & Evidence