Hydrazine hydrate (1:1) → 2-chloro-5,6-diphenyl-4-hydrazinopyrimidine

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Reaction Steps

2,4-Dichloro-5,6-diphenylpyrimidine (2.0 g, 6.6 mmol) (synthesized according to the procedure described in example 7) was treated with hydrazine hydrate (0.73 g, 14.6 mmol) in ethanol (10 ml) under stirring for 5 hours at room temperature. The reaction mixture was poured onto ice-water mixture. The solid thus separated was extracted with diethylether. The organic extract was washed with water, dried over anhydrous sodium sulphate and concentrated under reduced pressure to afford the title compound (0.64 g, 32.5%).

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