N,N-Dimethyl-1,3-propanediamine → HCID 67527701, compound

Participants

Reaction Steps

A pyridine (120 mL) solution of 2-(2-diethylamino-5-aminopyrimidin-4-ylamino)-3-(4-dimethylcarbamoyloxy-phenyl)propionic acid t-butyl ester (32.0 g, 0.067 mol) was cooled to −20° C. with a dry ice/CH3CN bath. The mixture stirred for 30 minutes, and then p-fluorobenzenesulfonyl chloride (13.18 g, 0.067 mol) was added slowly. The reaction was stirred at −20° C. for 4.5 hrs, and then 3-dimethylaminopropyl amine (8.52 mL, 0.067 mol) was added, and then the mixture was allowed to warm to room temperature overnight. The reaction was concentrated in vacuo. The residue was taken up in EtOAc (1 L), and the organic phase was washed with 0.5 M citric acid (3×900 mL), water (1×900 mL), sat. NaHCO3 (3×900 mL), brine (1×900 mL), dried (MgSO4), filtered, and concentrated in vacuo to yield a brown residue. The residue was purified by flash chromatography (50% EtOAc/hexanes on silica gel) to yield 33.04 g (77%) the title compound as a yellow foam. Rf=0.54 (3:2 EtOAc/hexanes on silica gel).

Provenance & Evidence