Neighbouring-group participation as the key step in the reactivity of acyclic and cyclic salicyl-derived O,O-acetals with 5-fluorouracil. Antiproliferative activity, cell cycle dysregulation and apoptotic induction of new O,N-acetals against breast cancer cells
作者:Estrella Saniger、Joaquı́n M Campos、Antonio Entrena、Juan A Marchal、Houria Boulaiz、Antonia Aránega、Miguel Á Gallo、Antonio Espinosa
DOI:10.1016/j.tet.2003.08.016
日期:2003.9
The reaction between o-(hydroxymethyl)phenoxyacetaldehyde dimethyl acetals, or 3-methoxy-2,3-dihydro-5H-1,4-benzodioxepins with 5-fluorouracil (5-FU), has been studied. The intramolecular cyclization may be explained through a neighboring group attack to give a 2-(5-fluorouracil-1-yl)oxyranium ion that can be attacked by the silylated benzylic hydroxy group to yield the benzannelated seven-membered
研究了邻-(羟甲基)苯氧基乙醛二甲基乙缩醛或3-甲氧基-2,3-二氢-5 H -1,4-苯并二恶英与5-氟尿嘧啶(5-FU)的反应。分子内环化可以通过相邻基团的进攻得到2-(5-氟尿嘧啶-1-基)氧基铀离子来解释,该离子可以被甲硅烷基化的苄基羟基进攻以产生苯甲酰化的七元O,N-乙缩醛。还报道了大环反式-双(5-FU O,N-缩醛)的形成。这种化合物将人MCF-7乳腺癌细胞阻滞在G o / G 1处细胞周期的阶段。相反,无环硝基O,N-缩醛似乎起5-FU前药的作用,因为它像众所周知的前药Ftorafur一样,将癌细胞阻滞在S期。