反应详情

A solution of the tetrabutylammonium salt of 4-amino-5-chloro-N-[2-(diethylamino)ethyl]-2-hydroxybenzamide (5.3 g, 10 mmoles) in acetonitrile (100 ml) was treated with 1-bromo-2-butanone (1.5 g, 10 mmoles) and stirred at 20° for 2 hours. The residue after concentration was treated with water and extracted with ethyl acetate and methylene chloride-2-propanol (5:1). The insoluble solid material was collected and combined with the organic extracts. Concentration of this mixture gave sticky crystalline material which was recrystallized from acetonitrile-water (4:1) to give the title product (3.1 g, 86%), mp. 103.0°-104.5°.

1. concentrationThe residue after concentration
2. additionwas treated with water
3. extractionextracted with ethyl acetate and methylene chloride-2-propanol (5:1)
4. customThe insoluble solid material was collected
5. customConcentration of this mixture gave sticky crystalline material which
6. customwas recrystallized from acetonitrile-water (4:1)