An important role played dianiones in the highly efficient macrocycle formation by an intramolecular alkyltion method: application to the synthesis of zearalenone
作者:Takashi Takahashi、Toshiharu Nagashima、Hiroshi Ikeda、Jiro Tsuji
DOI:10.1016/s0040-4039(00)85600-2
日期:1982.1
macrolides based on intramolecular alkylation of dianions, generated from phenylthiomethyl group and protected cyanohydrin, is reported. The use of dianions for the cyclization has several characteristics features; (1) Control of the conformation fo the side-chain, (2) Protection of the ester from a nucleophilic attack, (3) Acceleration of the intramolecular reaction without using high dilution conditions
报道了一种新的合成方法,该方法基于苯硫基甲基和受保护的氰醇生成的基于阴离子的分子内烷基化的大环内酯。使用二价阴离子进行环化具有几个特征。(1)控制侧链的构象,(2)保护酯免受亲核攻击,(3)在不使用高稀释条件的情况下加速分子内反应。为了证明这些推测,使用二价阴离子的烷基化和在玉米赤霉烯酮的合成进行了研究。