N'-Hydroxybenzenecarboximidamide → HCID 70576578, compound

Participants

Reaction Steps

N′-Hydroxybenzenecarboximidamide (49 mg, 0.36 mmol) was added to a stirred solution of compound 6a (90 mg, 0.24 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (91 mg, 0.48 mmol), 1-hydroxybenzotriazole (44 mg, 0.29 mmol) and N,N,-diisopropylethylamine (50 μL, 0.29 mmol) in DMF (2.4 mL). The reaction was allowed to stir at rt for 2 h, at which time, the reaction was partitioned between ethyl acetate and water. The layers were separated, and the organic layer was washed with water and brine, dried over MgSO4, filtered and concentrated to a crude oil that was dissolved in toluene (2.0 mL). The resulting mixture was heated to 100° C. for 1 h, at which time, the reaction was concentrated in vacuo, and the resulting crude residue was purified by preparative reversed phase HPLC on YMC Pack Pro C18 stationary phase (CH3CN/H2O as eluent, 0.05% TFA as modifier), followed by lyophilization of the purified fractions to afford the title compound 63. m/z (ES) 479 (MH)+; IP=C rating.

Provenance & Evidence