Hydrochloric Acid → HCID 135400900, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-Amino-1,6-dihydro-5-nitro-6-oxo-α-(phenylmethyl)-4-pyrimidine acetonitrile as prepared above (10.0 g) in 1N NaOH (600 mL) is added sodium dithionite (35 g). The reaction mixture is heated at 90° C. for 35 min and is acidified to pH 4 with 4N HCl while still hot. The reaction mixture is cooled in an ice bath and the precipitate is collected by filtration. It is dried over P2O5 under vacuum (4.0 g). The crude (undecarboxy-ated) product is dissolved in 300 mL conc HCl and quickly filtered through a glass frit before it crystallized out. The resulting suspension is boiled for five minutes and cooled. The product 2,6-Diamino-3, 5-dihydro-7-(phenylmethyl) -4H-pyrrolo[3,2-d]pyrimidin-4-one is collected by filtration (1.98 g, 23%) mp >250° C. (dec). ##STR13##

Provenance & Evidence