Mechanisms of Formation of Adducts from Reactions of Glycidaldehyde with 2‘-Deoxyguanosine and/or Guanosine
作者:Bernard T. Golding、Pritpal K. Slaich、Gordon Kennedy、Christine Bleasdale、William P. Watson
DOI:10.1021/tx950057c
日期:1996.1.1
formed from guanosine and glycidaldehyde. The structure analysis of this adduct was also aided by 13C NMR analysis of the 15N-labeled adduct derived from [1-15N]guanosine. Analogous adducts were obtained from the reaction between glycidaldehyde and deoxyguanosine. Mechanisms of formation of the adducts from glycidaldehyde and guanosine/deoxyguanosine are proposed and supported by model studies with simple
描述了由rac-but-3-ene-1,2-二醇方便地合成rac-缩水甘油醛和由D-甘露糖醇方便地合成(R)-缩水甘油醛。(R)-乙二醛(1)在水中与鸟嘌呤反应(pH 4-11,在较高pH下反应更快),最初产生6(S)-羟基-7(S)-(羟甲基)-3-(β-D -呋喃核糖基)-5,6,7-三氢咪唑并[1,2-α嘌呤-9(3H)-一(7a)和6(S),7(R)-二羟基-3-(β-D-呋喃核糖基)-5,6,7,8-四氢嘧啶基[1,2-α]嘌呤-10(3H)-一(8a)。前者分解为7-(羟甲基)-5,9-二氢-9-氧代-3-(β-D-核呋喃糖基)咪唑并[1,2-α]嘌呤(1,2-α)嘌呤(3a),5,9-二氢-9-氧代-3-(β-D-呋喃呋喃糖基)咪唑并[1,2-α]嘌呤(5a,1,N2-乙鸟嘌呤)和甲醛,而后者的加合物相对稳定。羟甲基在7-(羟甲基)-5的咪唑环上的位置 通过13 C NMR分