Potassium Carbonate → HCID 59300852, compound

Participants

Reaction Steps

Analogously to the general procedure (I) N-(3,3-dimethyl-6-nitro-2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (2 g) is alkylated using 1-bromo-2-butanone (1.7 ml; 15.2 mmol) and K2CO3 (2.1 g; 15.2 mmol) at 30° C. for 24 h. After aqueous work-up and purification by RP chromatography the pure material (0.65 g) is de-acetylated in MeOH (70 ml) using DBU (0.6 ml) at reflux. After aqueous work-up 5-amino-3,3-dimethyl-6-nitro-1-(2-oxo-butyl)-1,3-dihydro-indol-2-one (0.57 g) is obtained and used without further purification.

Provenance & Evidence