Water → HCID 11785015, compound

Participants

Reaction Steps

Under N2, to a solution of 1-[(R)-1-(tert-butyldimethylsilyloxy)-4-(6-hydroxyindol-1-yl)-2-butyl]imidazole-4-carboxamide (80 mg, 0.187 mmol) in DMF (5 ml) was added potassium carbonate (38.7 mg, 0.280 mmol) at room temperature. The reaction mixture was stirred for 30 minutes. And then 1-iodobutane (51.5 mg, 0.280 mmol) was added and the resulting mixture was stirred for 24 hours at 60-80° C. The reaction mixture was poured into water (50 ml) and extracted with ethyl acetate. The organic layer was washed with brine, dried (sodium sulfate) and evaporated in vacuo. The residue was purified by silica gel (3 g) chromatography eluting with chloroform/methanol (50:1) to give 1-[(R)-4-(6-butoxyindol-1-yl)-1-(tert-butyldimethylsilyloxy)-2-butyl]imidazole-4-carboxamide (66.3 mg, 73.3%).

Provenance & Evidence