Ethyl Acetate → HCID 86604030, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl (1R)-2-(7-hydroxy-1H-indol-3-yl)-1-methylethyl((2R)-2-pyridin-3-yl-2-((triethylsilyl)oxy)ethyl)carbamate (300 mg, 0.570 mmol) in N,N-dimethylformamide-(1.0 mL) are added potassium carbonate (98.5 mg, 0.714 mmol), (1S)-1-methyl-2-morpholin-4-yl-2-oxoethyl 4-methylbenzenesulfonate (JP-A-2000-273085) (196 mg, 0.627 mmol), and the mixture is stirred at 50° C. for one hour. To the reaction solution are added potassium carbonate (45 mg), (1S)-1-methyl-2-morpholin-4-yl-2-oxoethyl 4-methylbenzene-sulfonate (120 mg), and the mixture is stirred at 60° C. for 10 hours. After allowed to cool, to the reaction solution is added ethyl acetate (50 mL), and the mixture is filtered, washed with water and a saturated brine, and dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue is purified by silica gel column chromatography (chloroform/methanol=100/1→20/1) to give tert-butyl (1R)-1-methyl-2-(7-(((1R)-1-methyl-2-morpholin-4-yl-2-oxo-ethyl)oxy)-1H-indol-3-yl)ethyl((2R)-2-pyridin-3-yl-2-((triethylsilyl)oxy)-ethyl)carbamate (209 mg, yield: 55%).

Provenance & Evidence