Hydrazine hydrate (1:1) → 4-[2-(2,2,2-Trifluoroethyl)guanidino]-2-(2-aminoethyl)thiomethylpyrimidine

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Reaction Steps

A mixture of 4-[2-(2,2,2-trifluoroethyl)guanidino]-2-[(2-phthalimidoethyl)thiomethyl]pyrimidine (5.4 g.), ethanol (30 ml.) and 99% hydrazine hydrate (3 ml.) was heated under reflux for 1 hour and then evaporated to dryness. The residue was stirred with N hydrochloric acid and then filtered and the filtrate basified with 17N NaOH. The mixture was extracted with ether, and the ether extracts dried and evaporated to dryness to give 4-[2-(2,2,2-trifluoroethyl)guanidino]-2-[(2-aminoethyl)thiomethyl]pyrimidine (2.93 g.) which was used without further purification.

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