A four-step synthesis of 1-protected indol-3-ylmethyl isothiocyanates from indole-3-carboxaldehyde has been elaborated. [1-(tert-Butoxycarbonyl)indol-3-yl]-methyl isothiocyanate appeared to be a suitable biomimetic intermediate for the synthesis of protected phytoalexins brassinin and cyclobrassinin. Removing of the tert-butoxycarbonyl protecting group under specific conditions afforded phytoalexins identical with previously described compounds.
详细阐述了一种从
吲哚-3-甲酰醛出发合成1-保护
吲哚-3-基甲基异
硫氰酸酯的四步合成路线。[1-(叔丁氧羰基)
吲哚-3-基]甲基异
硫氰酸酯似乎是合成保护型植物抗毒素——
芸苔宁和环
芸苔宁的合适仿生中间体。在特定条件下移除叔丁氧羰基保护基团,得到了与先前描述的化合物相同的植物抗毒素。