An enantio- and diastereoselective synthesis of the naturally occuring merucathin is reported. The singlet oxygen ene reaction of the bis-Boc-protected allylic amine 3, which was prepared from L-alanine, was employed as key step for this regio- and diastereoselective synthesis. The ene reaction is highly erythro-selective and the newly formed double bond in the allylic hydroperoxide 5 is exclusively E-configured. Reduction of the allylic hydroperoxide 5 and base-catalyzed deprotection provides a convenient and unprecedented synthesis of the optically active E-configured β-amino allylic alcohol merucathin from the corresponding acylated allylic amine 3.
                                    报道了天然存在的merucathin的对映选择性和非对映选择性合成。由
L-丙氨酸制备的双Boc保护的
烯丙胺3的单线态氧烯反应被用作该区域和非对映选择性合成的关键步骤。烯反应具有高度的红选择性,烯
丙基氢过氧化物 5 中新形成的双键完全是 E 构型。烯
丙基氢过氧化物 5 的还原和碱催化的脱保护提供了从相应的酰化
烯丙胺 3 合成光学活性 E 构型 β-
氨基
烯丙醇 merucathin 的便捷且前所未有的合成方法。