1,1'-Carbonyldiimidazole → 1-Phenyltetrahydropyrimidin-2(1H)-one

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Reaction Steps

2.5 g (16.5 mM) of N1 -phenylpropane-1,3-diamine are dissolved in 56.5 ml of anhydrous tetrahydrofuran. A mixture of 3.8 g (23.3 mM) of carbonyldiimidazole in 115 ml of anhydrous tetrahydrofuran is poured into the solution, and the mixture is left at room temperature overnight. The mixture is concentrated, taken up in ethyl acetate, washed with normal HCl and dried over MgSO4 to yield 2 g of a white solid that melts at 210°-211° C. and corresponds to the expected product.

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