反应详情

A slurry of 1-(2-aminophenyl)indoline hydrochloride (41.44 g) in CH2Cl2 (400 ml) under N2 at 0° C. is treated dropwise with a solution of triethylamine (2.2 equivalents) in CH2Cl2 (80 ml) and then with a solution of cyclobutylcarbonyl chloride (20 g) in CH2Cl2 (50 ml). After warming to room temperature, the product is poured into water (300 ml). The organic layer is washed with 4 N HCl, 2.5 N NaOH, water, dried (Na2SO4), filtered, and concentrated to yield 1-[2-(cyclobutylcarbonyl)aminophenyl]indoline, m.p. 81°-83.5° C.

1. washThe organic layer is washed with 4 N HCl, 2.5 N NaOH, water
2. dry with materialdried (Na2SO4)
3. filtrationfiltered
4. concentrationconcentrated