反应详情

Into an 15 mL high pressure glass vial (with Teflon screw cap) were added 5-bromoisatoic anhydride (0.401 g, 1.66 mmol), DMAP (20 mg, 0.16 mmol), and dimethyl amine (2 M in THF; 5.0 mL, 10.0 mmol). The vial was sealed and placed in an oil bath at 70° C. for 8 h after which it was concentrated under vacuum. The crude product was dissolved in EtOAc and washed 2× with water followed by brine. The organic phase was dried (Na2SO4), filtered and concentrated to afford 0.428 g of 2-Amino-5-bromo-N,N-dimethyl-benzamide as a pink solid, which was used directly for the next step. 1H-NMR (500 MHz, d6-DMSO) δ=7.19 (dd. J=2.0, 8.5 Hz, 1H), 7.08 (d, J=2.0 Hz, 1H), 6.63 (d, J=8.5 Hz, 1H), 5.31 (br. s, 2H), 2.89 (br. s, 6H). MS: m/z 198/200 [C═O+].

1. customThe vial was sealed
2. concentrationafter which it was concentrated under vacuum
3. dissolutionThe crude product was dissolved in EtOAc
4. washwashed 2× with water
5. dry with materialThe organic phase was dried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated