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4-amino-pyrimidine not only has important biological activity[1], but also is the intermediate for some medicines. It can be prepared by cyclotrimerization of nitriles. Meyer[2] found that acetonitrile could be cyclotrimerized to 4-amino-2,6-dimethyl-pyrimidine in the presence of sodium. Excess sodium methoxide or potassium methoxide reacts with acetonitrile to give this product in a sealed equipment at 140 ℃ for 5 h with 70%~80% yield[3,4]. 相似文献
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