Total Synthesis of Kealiiquinone, an Imidazole Marine Alkaloid.
作者:Ikuo KAWASAKI、Norio TAGUCHI、Masayuki YAMASHITA、Shunsaku OHTA
DOI:10.1248/cpb.45.1393
日期:——
The total synthesis of kealiiquinone (1), a highly substituted imidazole marine alkaloid isolated from sponge, was achieved via nine reaction steps starting from 1-methyl-1H-imidazole (5). The synthesis is based on the selective introduction of appropriate carbogenic substituents and protecting groups into the imidazole ring followed by an intramolecular cyclization of the substituents on the C4- and the C5-positions. The structure of the synthesized kealiiquinone was confirmed by X-ray crystallographic analysis.
从海绵中分离出的高度取代的咪唑类海洋生物碱kealiiquinone(1)的合成共经历了九个反应步骤,从1-甲基-1H-咪唑(5)开始。合成过程基于选择性地将合适的碳原子上取代基和保护基团引入咪唑环,然后对C4和C5位置的取代基进行分子内环化。合成后的kealiiquinone的结构通过X射线晶体学分析得到了证实。