A facile synthesis of fused aromatic spiroacetals based on the 3,4,3′,4′-tetrahydro-2,2′-spirobis(2H-1-benzopyran) skeleton
作者:Margaret A. Brimble、Christopher L. Flowers、Michael Trzoss、Kit Y. Tsang
DOI:10.1016/j.tet.2006.04.026
日期:2006.6
The facile synthesis of a series of aromatic 6,6-spiroacetals based on the parent 3,4,3′,4′-tetrahydro-2,2′-spirobis(2H-1-benzopyran) heterocyclic system is reported. Key steps included the use of a Sonogashira coupling for the synthesis of an aryl acetylene that was coupled to an aryl aldehyde to form a propargyl alcohol intermediate. Hydrogenation of the alkynol followed by oxidation produced a masked
报道了基于母体3,4,3',4'-四氢-2,2'-螺双(2 H -1-苯并吡喃)杂环体系的一系列芳族6,6-螺缩醛的简便合成。关键步骤包括使用Sonogashira偶联剂合成芳基乙炔,该芳基乙炔与芳基醛偶联形成炔丙醇中间体。炔醇的氢化反应,然后氧化,生成了一种被掩盖的二羟基酮,该酮在用三甲基甲硅烷基溴处理后进行脱保护和环化成稠合的芳族螺缩醛。