Ammonium Sulfate → 5-(Aminomethyl)-4-(isopropylamino)-2-(methylthio)pyrimidine

Participants

Reaction Steps

To a stirred 0° C. suspension of 5.9 g (156.3 mmol) of LAH in 200 mL of tetrahydrofuran is added dropwise a solution of 15.5 g (74.4 mmol) of 4-(isopropylamino)-2-(methylthio)-5-pyrimidinecarbonitrile in 500 mL of tetrahydrofuran. The reaction is allowed to warm slowly to room temperature overnight. The mixture is recooled to 0° C., and treated with a saturated solution of ammonium sulfate until there is no more effervescence. After stirring for another 15 minutes, the gray solids are filtered and washed six times with hot ethyl acetate. The combined organic washes are concentrated, and the residue is purified by chromatography in two portions on a 4×15 cm Biotage silica gel column that is eluted with 60:38:2 acetonitrile/dichloromethane/triethylamine followed by 60:33:5:2 acetonitrile/dichloromethane/methanol/triethylamine to obtain 12.9 g (82%) of the title compound as a yellow oil. Mass Spectrum (CI) (m+1)/z 213.

Provenance & Evidence