4-Nitrophenol → 1,3-dimethyl-6-{4-[2-(4-nitrophenoxy)ethyl]piperazin-1-yl}-2,4(1H,3H)-pyrimidinedione

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Reaction Steps

To 100 ml of anhydrous tetrahydrofuran were added 5.37 g of 1,3-dimethyl-6-[4-(2-hydroxyethyl)piperazin-1-yl]-2,4(1H,3H)-pyrimidinedione, 3.20 g of 4-nitrophenol and 6.03 g of triphenylphosphine, and the resultant mixture and 50 ml of an anhydrous tetrahydrofuran solution containing 3.9 g of diethyl azodicarboxylate were treated in the same manner as in Reference Example 4, thereby obtaining 5.40 g of crystalline 1,3-dimethyl-6-[4-(2-[4-nitrophenoxy] ethyl)piperazin-1-yl]-2,4(1H,3H)-pyrimidinedione (Compound x).

Provenance & Evidence