反应详情

Oxalyl chloride (7.71 mL, 89.7 mmol) was added dropwise to a suspension of 3,5-dibenzyloxybenzoic acid (20.0 g, 59.8 mmol) in DCM (0.5 L) under argon. The reaction was stirred at RT for 6 hours after which time the volatiles were removed in vacuo. The residue was taken up in DCM (300 mL) and a solution of 1-methyl-1H-pyrazol-3-amine (5.81 g, 59.8 mmol) in DCM (50 mL) was added dropwise. The resulting solution was stirred for 16 hours at RT after which time a precipitate had formed. The solid was isolated by filtration and recrystallised from ethanol to give the title compound as a white solid (14.8 g). 1H NMR δ (d6-DMSO): 3.84 (3H, s), 5.17 (4H, s), 6.59 (1H, d), 6.84 (1H, t), 7.33-7.46 (12H, m), 7.62 (1H, d), 10.83 (1H, s); m/z 414 (M+H)+.

1. customwere removed in vacuo
2. stirringThe resulting solution was stirred for 16 hours at RT after which time a precipitate
3. customhad formed
4. customThe solid was isolated by filtration
5. customrecrystallised from ethanol