Hydrochloric Acid → 2-Amino-1,6-dihydro-5-nitro-6-oxo-alpha-(2-thienylmethyl)-4-pyrimidineacetonitrile

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Reaction Steps

A solution of 2-Amino-α-cyano-1,6-dihydro-5-nitro-6-oxo-α-(2-thienylmethyl)-4-pyrimidineacetic acid, ethyl ester as prepared above (5.0 g) in 1N NaOH (200 mL) is stirred at room temperature for 90 min. The reaction mixture is acidified to pH 1 with 4N HCl and stirred for 5 min. The reaction mixture is neutralized (pH 7) with 1N NaOH and the product 2-Amino-1,6-dihydro-5-nitro-6-oxo-α-(2-thienylmethyl)-4-pyrimidineacetonitrile (4.1 g, 98%) is collected by filtration. ##STR15##

Provenance & Evidence