Pyrimidine derivatives and related compounds. Part 36. Nucleophilic addition reaction of a cyanide lon to 6-substituted 1,3-dimethyl-5-nitrouracils. Synthesis of 5,6-dihydrouracil and 5,6-dihydrocyclo-thymine derivatives
作者:Kosaku Hirota、Yoshihiro Yamada、Tetsuji Asao、Shigeo Senda
DOI:10.1039/p19810001896
日期:——
6-Substituted 1,3-dimethyl-5-nitrouracils (3a–c) react with potassium cyanide to give stereospecifically the 6-cyano-5-nitro-5,6-dihydrouracils (4a–c). Reaction of 6-bromomethyl-1,3-dimethyl-5-nitrouracil (7) with potassium cyanide gives 6-cyano-1,3-dimethyl-5-nitro-5,6-dihydrocyclothymine (8). The structures of the 5,6-dihydrouracils (4a–c) and the cyclothymine (8) were clarified using 1H and 13C
6-取代的1,3-二甲基-5-硝基尿嘧啶(3a–c)与氰化钾反应生成立体定向的6-氰基-5-硝基-5,6-二氢尿嘧啶(4a–c)。使6-溴甲基-1,3-二甲基-5-硝基尿嘧啶(7)与氰化钾反应,得到6-氰基-1,3-二甲基-5-硝基-5,6-二氢环胸腺嘧啶(8)。使用1 H和13 C核磁共振波谱对5,6-二氢尿嘧啶(4a–c)和环胸腺嘧啶(8)的结构进行了澄清。