Phenyl isocyanate → 5-(3-(2-((tert-butyldimethylsilyl)oxy)ethyl)isoxazol-5-yl)-N2-(3-fluorophenyl)-N4-propylpyrimidine-2,4-diamine

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-ethynyl-N2-(3-fluorophenyl)-N4-propylpyrimidine-2,4-diamine (S2, 30 mg) and tert-butyldimethyl(3-nitropropyloxy)silane (S3, 146 mg) synthesized according to the method described in Journal of Medicinal Chemistry, 2011, 54, pp. 7280-7288 in toluene (1 mL), phenyl isocyanate (36 μL) and triethylamine (46 μL) were added at room temperature, and the mixture was stirred at 60° C. for 4 hours and 40 minutes. To the reaction mixture, phenyl isocyanate (36 μL) and triethylamine (46 μL) were added, and the mixture was further stirred at 60° C. for 6 hours. The reaction mixture was cooled to room temperature, and then water and ethyl acetate were added to the reaction mixture. The organic layer was separated, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure to obtain 5-(3-(2-((tert-butyldimethylsilyl)oxy)ethyl)isoxazol-5-yl)-N2-(3-fluorophenyl)-N4-propylpyrimidine-2,4-diamine (S4, 22 mg).

Provenance & Evidence