反应详情

Indole-5-carboxylic acid (1.00 g, 6.21 mmol) and tert-butyl N,N′-diisopropylcarbamimidate 2.29 g) were combined in 15 mL of THF and the reaction mixture was stirred for 25 hours. The reaction mixture was concentrated and the residue was purified on a silica gel column eluting with a gradient of 5% ethyl acetate/hexane to 100% ethyl acetate to provide tert-butyl 1H-indole-5-carboxylate (0.800 g, 3.68 mmol, 59%.)

1. concentrationThe reaction mixture was concentrated
2. customthe residue was purified on a silica gel column
3. washeluting with a gradient of 5% ethyl acetate/hexane to 100% ethyl acetate