Triethylamine → tert-butyl 4-((4-(5-((ethoxycarbonyl)amino)-1H-indol-1-yl)thiazol-2-yl)oxy)piperidine-1-carboxylate

Participants

Reaction Steps

To a stirred solution of tert-butyl 4-((4-(5-amino-1H-indol-1-yl)thiazol-2-yl)oxy)piperidine-1-carboxylate (intermediate-35) (0.100 g, 0.214 mmol) in dichloromethane (4 mL), triethylamine (0.036 g, 0.362 mmol), and chloroethylformate (0.026 g, 0.214 mmol) were added at 0° C. and stirred at room temperature for 10 minutes. The reaction was quenched with water and the mixture was extracted with dichloromethane. The organic layer was concentrated in vacuo and the residue was purified by flash column chromatography to give tert-butyl 4-((4-(5-((ethoxycarbonyl)amino)-1H-indol-1-yl)thiazol-2-yl)oxy)piperidine-1-carboxylate (0.010 g, 8.5%)

Provenance & Evidence