4,7-diamino-1-(2-deoxy-3,5-di-p-toluoyl-β-D-erythro-pentofuranosyl)-5-methoxy-pyrimido-[4,5-d]pyrimidine-2(1H)-one 在
sodium hydroxide 作用下,
以
1,4-二氧六环 为溶剂,
反应 6.0h,
以90%的产率得到4,7-diamino-1-(2-deoxy-β-D-erythro-pentofuranoyl)pyrimido[4,5-d]pyrimidine-2,5(1H,6H)-dione