Dimethylformamide → HCID 178524097, compound

Participants

Reaction Steps

Compound 36A Y=Phenyl, (200 mg, 0.8 mmol) was activated in 8 mL DMF with TBTU (282 mg, 0.88 mmol) and DIEA (0.285 mL, 1.6 mmol) for 30 minutes at room temperature. This solution was then added to Compound 579b (265 mg, 0.95 mmol) and stirred at ambient temperature for 20 hours. The reaction was concentrated to a residue in-vacuo and then dissolved in acetic acid (20 mL) and refluxed overnight. In the morning, the acetic acid was removed in-vacuo and the crude residue dissolved in a mixture of THF (20 mL), methanol (16 mL) and 2 M NaOH (4 mL) and the solution heated at 60 C. overnight. The solution was then concentrated in-vacuo to an aqueous solution and concentrated HCl added until the pH was 5. The resulting precipitate was filtered, washed with water and purified using RP-HPLC column to give the pure title compound.

Provenance & Evidence