One-Pot Synthesis of 5-Alkoxy-4-amino-3-halo-2(5<i>H</i>)-furanones Containing Benzimidazole Moiety in the Absence of Metal Catalyst
作者:Pai Peng、Min-Hua Feng、Jie Shi、Jia-Li Zheng、Yan-Cheng Wu、Zhao-Yang Wang、Ren-Hong Chen
DOI:10.2174/1570178612666150305002655
日期:2015.5.9
In the presence of KF as base and THF as solvent, the tandem Michael addition-elimination
reaction of different 5-alkoxy-3,4-dihalo-2(5H)-furanones with aminomethyl benzimidazoles at room
temperature gave 21 target compounds simultaneously containing both bioactive benzimidazole and
2(5H)-furanone moieties in yields of 62-88 % (mostly over 71 %). The structures of all the newly
synthesized compounds were elucidated and confirmed by FTIR, UV, 1H NMR, 13C NMR, mass
spectroscopy and elemental analysis. The simple one-pot synthetic method provides a brief route for the introduction of
the benzimidazole unit into 2(5H)-furanone derivatives under mild conditions without any metal catalysts. This transformation
also affords an important synthetic strategy for the series 2(5H)-furanone derivatives, as well as a basis for the activity
test of these potential drug molecules.
在 KF 为碱、THF 为溶剂存在下,串联迈克尔加成-消除反应
不同5-烷氧基-3,4-二卤-2(5H)-呋喃酮与氨甲基苯并咪唑在室温下的反应
温度下得到 21 种目标化合物,同时含有生物活性苯并咪唑和
2(5H)-呋喃酮部分的产率为 62-88%(大部分超过 71%)。所有新建的结构
合成的化合物通过 FTIR、UV、1H NMR、13C NMR、mass 等进行了阐明和证实
光谱学和元素分析。简单的一锅合成方法为引入
在温和条件下,无需任何金属催化剂,将苯并咪唑单元转化为2(5H)-呋喃酮衍生物。这种转变
还为2(5H)-呋喃酮系列衍生物提供了重要的合成策略,以及活性的基础
测试这些潜在的药物分子。