number of environmental pollutants and endogenous oxidation agents form 1-(2-deoxy-β-D-ribofuranosyl)-5-hydroxy-5-methylhydantoin (HydT), an important DNA lesion resulting from thymidine oxidation. In this paper, two intermediates, postulated in the formation of HydT, have been characterised for the first time. The first, N1-formyl-N3-pyruvoylurea intermediate, was produced by the ozonolysis reaction of
许多环境污染物和内源性氧化剂形成了1-(2-deoxy-β- D - rifurfuranosyl)-5-hydroxy-5-methylhydantoin(HydT),这是
胸苷氧化导致的重要DNA损伤。在本文中,首次表征了HydT形成中假定的两种中间体。第一种N 1-甲酰基-N 3-
丙酮酸中间体是通过2',3',5'- tri - O-乙酰基
核糖-,3',5'- di - O - TBS-和N 3,O 3′,O 5-三苄基保护的
胸苷,经分解并取决于保护基和条件显示,单独或与受保护的-β - D-
呋喃呋喃糖基-N 1-甲酰
脲和甲酰胺产物一起生成HydT。另外,第二种且长期寻求的,开链的
丙酮酸脲中间体是通过在保护的β- D-
呋喃核糖基-,2-脱氧-β - D-
呋喃核糖基-和2-deoxy-β- D-中从头合成而产生的。核
吡喃糖基系统。已经确定了诱导HydT的乙内酰
脲环环化的条件。从头开始使用的
化学