Stereoselective synthesis of highly substituted 8-oxabicyclo[3.2.1]octanes and 2,7-dioxatricyclo[4.2.1.03,8]nonanes
作者:Dmitry A. Khlevin、Sergey E. Sosonyuk、Marina V. Proskurnina、Nikolay S. Zefirov
DOI:10.1016/j.tet.2012.05.029
日期:2012.7
The synthesis of new polyhydroxylated 8-oxabicyclo[3.2.1]octanes and 2,7-dioxatricyclo[4.2.1.03,8]nonanes is described. These structures is an interesting synthetic blocks for potential bioactive molecules. The precursor, 3-chloro-8-oxabicyclo[3.2.1]oct-6-ene-2,4-dione was obtained from reaction of tetrachlorocyclopropene with furan, then it was involved in carbonyl groups reduction and double bond
描述了新的多羟基化的8-氧杂双环[3.2.1]辛烷和2,7-二氧杂三环[4.2.1.0 3,8 ]壬烷的合成。这些结构是潜在的生物活性分子的有趣合成嵌段。四氯环丙烯与呋喃反应制得前体3-氯-8-氧杂双环[3.2.1] oct-6-ene-2,4-二酮,然后参与羰基的还原和双键的氧化反应,形成一个在C-3位置不同取代的具有5个新立体中心的多羟基化衍生物。 使用分子内跨环羟基环化,将双环环氧二乙酸酯通过醇盐中间体高产率转化为2,7-二氧杂三环[4.2.1.0 3,8 ]壬烷。如此获得的化合物具有接近某些具有抗肿瘤和糖苷酶抑制剂活性的分子的结构。