Trifluoroacetic anhydride → HCID 75151423, compound

Participants

Reaction Steps

To a stirred solution of tert-butyl {6-[({[(4-methyl-1,2,5-thiadiazol-3-yl)(phenyl)methylene]-amino}oxy)methyl]pyridin-2-yl}carbamate (104 mg, 0.24 mmol) in dry DMF (5 mL) was added sodium hydride (60 wt.-% in mineral oil, 11 mg, 0.27 mmol). After stirring at room temperature for 15 min, 1-iodohexane (62 mg, 0.29 mmol) was added, and the mixture stirred at room temperature for 16 h. After dropwise addition of trifluoroacetic anhydride (1 mL, 13 mmol), the mixture was stirred at 50° C. for 8 h. The cooled reaction mixture was poured into sat. aq. NaHCO3 (40 mL), extracted with ethyl acetate (2×30 mL), the organic layer was washed with water, dried (MgSO4) and concentrated in vacuo. Purification on silica gel afforded N-hexyl-6-[({[(4-methyl-1,2,5-thiadiazol-3-yl)(phenyl)methylene]amino}-oxy)methyl]pyridin-2-amine as an orange oil [79 mg, yield 75%; HPLC/MS: m/z=410 (M+H); log P(HCOOH)=3.11].

Provenance & Evidence