Synthesis of Coronafacic Acid via TBAF-Assisted Elimination of the Mesylate and Its Conversion to the Isoleucine Conjugate
作者:Yusuke Kosaki、Narihito Ogawa、Qian Wang、Yuichi Kobayashi
DOI:10.1021/ol201576c
日期:2011.8.19
derived mesylate was used to construct the side chain that was designed to afford the cyclohexene ring of coronafacic acid via intramolecular alkylation. Elimination of the mesylate proceeded with TBAF. The alkylation was achieved with t-BuOK in THF, and then hydrolysis afforded coronafacic acid, which upon condensation with unprotected l-isoleucine using ClCO2Bui furnished coronafacoyl-l-isoleucine, the
使用醛醇缩合反应,随后消除衍生的甲磺酸酯,以构建侧链,该侧链经设计以通过分子内烷基化提供冠糖酸的环己烯环。TBAF消除了甲磺酸盐。该烷基化用实现吨在THF -BuOK,然后水解,得到酸晕斑,其在与未受保护的缩合升使用ClCO -异亮氨酸2卜我布置coronafacoyl-升-异亮氨酸,所述升-Ile缀合物。