A concise, enantiospecific synthesis of pseudopteroxazole (3), which had originally been assigned structure 1, has been accomplished starting from S-(-)-limonene. The known cyclohexanone 5 was converted in five steps to the alpha,beta-enone 8 by a modified Robinson annulation. Transformation of 8 to the orthogonally protected amino phenol 11 was accomplished by a new modification of the Wolff-Semmler
从 S-
(-)-柠檬烯开始,原定为结构 1 的拟菌灵 (3) 的简明、对映特异性合成已完成。已知的
环己酮 5 通过改进的 Robinson 环化分五步转化为 α,β-烯酮 8。8 到正交保护的
氨基苯酚 11 的转化是通过 Wolff-Semmler 重排的新修饰完成的。该合成通过阳离子环化以非对映选择性形成14并随后引入末端
恶唑亚基来完成。