Synthesis and properties of 1-(3′-dihydroxyboryl-2′,3′-dideoxyribosyl)pyrimidines
作者:Byung Ju Kim、Jinhua Zhang、Shenglan Tan、Donald S. Matteson、William H. Prusoff、Yung-Chi Cheng
DOI:10.1039/c2ob26756j
日期:——
Nucleoside analogues having a boronic acid in place of the 3-hydroxyl group of deoxyribose have been synthesized. The synthesis of 3′-dihydroxyboryl-2′,3′-dideoxyribose was based on asymmetric homologation of boronic esters with (dihalomethyl)lithium, beginning from a (silyloxymethyl)boronic ester. A change of chiral director is required before introduction of the second stereocenter, and the direct
已经合成了具有硼酸代替脱氧核糖的3-羟基的核苷类似物。3′-二羟基硼基-2′,3′-二脱氧核糖的合成基于硼酸酯与(二卤代甲基)锂的不对称同系物,从(甲硅烷氧基甲基)硼酸酯开始。在引入第二个立体中心之前,需要改变手性导向剂,并且将(S,S)-1,2-二环己基-1,2-乙二醇直接置换为(1 S,2 S,3 R,5 S) -pin二醇被用于此目的。1-乙酰氧基-3-二氧基硼基-5-叔丁基的pin二醇酯的偶联用三甲基甲硅烷基溴完成具有甲硅烷基化嘧啶碱基的-丁基甲硅烷氧基脱氧核糖类似物。硼酸核苷类似物对Hep G2(人类肝癌)细胞无细胞毒性。在37°C,pH 7.4的情况下,在数小时内发生分解,并释放了嘧啶游离碱。