Trifluoroacetic acid → HCID 86643698, compound

Participants

Reaction Conditions

Reaction Steps

(S)-3-(9-Methylthio-6-oxo-2,3,3a,4-tetrahydro-1H,6H-5,8,10,10b-tetraazabenzo[e]azulen-5-yl)benzoic hydrazide (257 mg, 0.67 mmol) obtained in Step 2 of Example 56 was dissolved in dichloromethane (8.0 mL), and the mixture was cooled to 0° C. after adding triethylamine (0.19 mL, 1.34 mmol). Thereafter, anhydrous trifluoroacetic acid (0.19 mL, 1.34 mmol) was added dropwise to the mixture, and the mixture was stirred at room temperature for 30 minutes. The mixture was concentrated under reduced pressure, and a 3 mol/L aqueous sodium hydroxide solution was added to the resulting residue to adjust the pH at 4. The precipitated white solid was then filtered off to obtain (S)-3-(9-methylthio-6-oxo-2,3,3a,4-tetrahydro-1H,6H-5,8,10,10b-tetraazabenzo[e]azulen-5-yl)-N′-(2,2,2-trifluoroacetyl)benzoic hydrazide (300 mg, 93%).

Provenance & Evidence