Phenyl chloroformate → HCID 23153594, compound

Participants

Reaction Steps

4-Amino-6-(2-chloro-4-nitropenoxy)pyrimidine (230 mg) was dissolved in tetrahydrofuran (5 ml) under a nitrogen atmosphere, and then triethylamine (0.24 ml) and phenyl chloroformate (0.216 ml) were added dropwise thereto while cooling in an ice bath, followed by stirring at room temperature for 1 hr. Pyrrolidine (0.507 ml) was added thereto, followed by stirring for another 1 hr. The reaction mixture was partitioned between ethyl acetate and a saturated aqueous solution of ammonium chloride. The organic layer was washed with a saturated aqueous solution of ammonium chloride, water, a saturated aqueous solution of sodium hydrogencarbonate and brine in this order, and dried over anhydrous sodium sulfate. The solvent was evaporated under a reduced pressure to give a residue, to which ethanol (20 ml)-water (5 ml) was added to dissolve, and then electrolytic iron powder (400 mg) and ammonium chloride (800 mg) were added thereto, followed by heating under reflux for 2 hr. The reaction mixture was cooled down to room temperature, and filtered through celite to remove an insoluble portion, which was washed with ethyl acetate-tetrahydrofuran (1:1) and water. The organic layer of the filtrate was separated, washed with water and brine in this order, and dried over anhydrous sodium sulfate. The solvent was evaporated under a reduced pressure to give a residue, which was then purified by silica gel column chromatography (eluent; hexane:ethyl acetate=1:4, then ethyl acetate) to provide the titled compound (145.5 mg, 51%) as white powder.

Provenance & Evidence