Triethylamine → ethyl 4,4-difluoro-1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of diethyl 1-(3-amino-2,2-difluoropropyl)-1H-indole-2,6-dicarboxylate (2.3 g) in ethanol (160 mL) are added triethylamine (2.7 mL, 19.0 mmol) and K2CO3 (1.3 g, 9.5 mmol). The mixture is heated at 80° C. for 16 h. Ethanol is removed under vacuum and water (100 mL) is added. The resulting light yellow solid is filtered and dried to afford the title compound (1.2 g, 70% for 3 steps).

Provenance & Evidence