Synthesis and Hypnotic Activities of 4-Thio Analogues of N3-Substituted Uridines.
作者:Shigetada KOZAI、Tokumi MARUYAMA、Toshiyuki KIMURA、Ikuo YAMAMOTO
DOI:10.1248/cpb.49.1185
日期:——
Reaction of tri-O-acetyluridine (1) with benzyl bromide or 2-chloroacetophenone in the presence of K2CO3 gave the N3-substituted analogues 2a, c. Condensation of 1 with (±)-1-phenylethanol or 3, 5-dimethylbenzyl alcohol using the Mitsunobu reaction also gave 2b, d in good yields. These compounds were allowed to react with Lawesson’s reagent and were subsequently treated with ammonia to afford the 4-thiouracil derivatives 5a-d. Compounds 5a-c showed moderate hypnotic activity in mice. However, N3-(3, 5-dimethyl)benzyl derivatives 3d, 5d were found to be almost inactive in this assay.
在K2CO3存在下,三-O-乙酰尿苷(1)与苄溴或2-氯乙酰苯反应,得到N3取代的类似物2a、2c。通过Mitsunobu反应,1与(±)-1-苯乙醇或3,5-二甲基苄醇缩合,也能以良好产率得到2b、2d。这些化合物与Lawesson试剂反应,随后用氨处理,得到4-硫尿嘧啶衍生物5a-d。化合物5a-c在小鼠中显示出适度的镇静活性。然而,N3-(3,5-二甲基)苄基衍生物3d、5d在此测试中几乎无活性。