Potassium Carbonate → HCID 59301022, compound

Participants

Reaction Steps

Analogously to general procedure (I) N-(3,3-dimethyl-6-nitro-2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (3 g) is alkylated using 1-iodo-3-pentyne (4.42 g; 22.8 mmol) and K2CO3 (4.29 g; 30.4 mmol) at 40° C. for 5 d. After aqueous work-up and purification by RP chromatography a part of the material (0.4 g) is de-acetylated in MeOH (30 ml) using DBU (0.4 ml) at reflux. After aqueous work-up 5-amino-3,3-dimethyl-6-nitro-1-pent-3-ynyl-1,3-dihydro-indol-2-one (0.35 g) is obtained and used without further purification.

Provenance & Evidence