Facile and Efficient Synthesis of Lactols by a Domino Reaction of 2,3-Epoxy Alcohols with a Hypervalent Iodine(III) Reagent and Its Application to the Synthesis of Lactones and the Asymmetric Synthesis of (+)-Tanikolide
作者:Hiromichi Fujioka、Satoshi Matsuda、Mai Horai、Eri Fujii、Maiko Morishita、Natsuko Nishiguchi、Kayoko Hata、Yasuyuki Kita
DOI:10.1002/chem.200601341
日期:2007.6.15
The domino reaction of 2,3-epoxy-1-alcohol derivatives, namely tetrasubstituted 2,3-epoxy-1-alcohols and 2- or 3-alkyl trisubstituted 2,3-epoxy-1-alcohols, with PhI(OCOCF(3))(2) in the presence of H(2)O is described in detail. In this reaction, several types of lactol derivatives can be directly obtained from the 2,3-epoxy-1-alcohol derivatives in a single operation. The obtained lactols were successively
2,3-环氧-1-醇衍生物(即四取代的2,3-环氧-1-醇和2-或3-烷基三取代的2,3-环氧-1-醇)与PhI(OCOCF(3 ))(2)在H(2)O存在的情况下进行了详细描述。在该反应中,可以通过一次操作从2,3-环氧-1-醇衍生物直接获得几种类型的内酯衍生物。将获得的内酯依次转化为相应的内酯。该反应适用于光学活性内酯化合物的构建。通过使用该反应,已经有效地实现了抗真菌海洋天然产物(+)-tanikolide的不对称全合成。