反应详情

A mixture of 4-amino-5-chloro-N-[2-(diethylamino)ethyl]-2-hydroxybenzamide hydrochloride (5.82 g, 18 mmoles), anhydrous potassium carbonate (12.48 g; 90 mmoles) in DMF (30 ml) and 1-bromo-3-methyl-2-butanone [4.5 g, 27 mmoles; prepared according to M. Gaudry and A. Marquet, Org. Syn. 55, 24 (1976)] was stirred for 20 hours under nitrogen. The mixture was poured into water (150 ml) and the solid collected, dried and crystallized from toluene to give the title compound (4.86 g, 73%), mp. 109°-110°. The NMR spectrum (90 MHz) gave the following resonances: δ 8.56 (bt, 1H); 8.24 (s, 1H); 6.18 (s, 1H); 4.8 (s, 2H); 4.44 (s, 2H) 3.56 (m, 2H); 2.62 (m, 7H); 1.2 (d, 6H); 1.06 (t, 6H).

1. customprepared
2. customthe solid collected
3. customdried
4. customcrystallized from toluene