Synthesis of aromatic spiroacetals related to γ-rubromycin based on a 3H-spiro[1-benzofuran-2,2′-chromane] skeleton
作者:Kit Yee Tsang、Margaret A. Brimble
DOI:10.1016/j.tet.2007.02.033
日期:2007.6
The synthesis of a series of aromatic 5,6-benzannelated and naphthyl-benzannelated spiroacetals related to the spiroacetal unit present in the quinonoid antibiotic γ-rubromycin is reported. The key steps include the use of Sonogashira coupling to construct an aryl acetylene that is coupled to an aryl aldehyde forming a propargyl alcohol intermediate. Hydrogenation of the resultant alkynol followed
据报道,与存在于醌类抗生素γ-鲁布霉素中的螺缩醛单元有关的一系列芳香族5,6-苯甲酰化和萘基-苯甲酰化螺缩醛的合成。关键步骤包括使用Sonogashira偶联来构建芳基乙炔,该芳基乙炔与芳基醛偶联形成炔丙醇中间体。生成的炔醇加氢,然后氧化,得到被掩盖的二羟基酮,该二羟基酮在用二氧化硅负载的硫酸钠中处理后,同时进行脱保护和环化反应,得到所需的稠合芳族螺缩醛。