molecules of cyanopropargylic alcohols under mild conditions (K2CO3, DMF, 20–25 °C, 10–48 h) by the hydroxy groups of the ribose moiety to afford representatives of the two novel families of cytidine cyclicketals. The first ones (53–76% yields) are formed with participation of the two vicinal hydroxyl groups (at 2′,3′-cis-positions) only. The second ones (7–21% yields) represent the adducts of cytidine with
摘要 胞苷通过核糖部分的羟基在温和的条件下(K 2 CO 3,DMF,20–25°C,10–48 h)与一个或两个氰基炔丙醇分子反应,以提供两个新的胞苷家族的代表环状缩酮。第一个(53-76%的收率)仅在两个邻羟基(2',3'-顺式位置)参与下形成。第二个(7-21%的收率)代表胞苷与两个涉及所有三个羟基的氰基炔丙醇分子的加合物。 胞苷通过核糖部分的羟基在温和的条件下(K 2 CO 3,DMF,20–25°C,10–48 h)与一个或两个氰基炔丙醇分子反应,以提供两个新的胞苷家族的代表环状缩酮。第一个(53-76%的收率)仅在两个邻羟基(2',3'-顺式位置)参与下形成。第二个(7-21%的收率)代表胞苷与两个涉及所有三个羟基的氰基炔丙醇分子的加合物。