Reinventing the De Mayo reaction: synthesis of 1,5-diketones or 1,5-ketoesters <i>via</i> visible light [2+2] cycloaddition of β-diketones or β-ketoesters with styrenes
作者:Rebeca Martinez-Haya、Leyre Marzo、Burkhard König
DOI:10.1039/c8cc07044j
日期:——
reaction between 1,3-diketones and styrenes following a [2+2] cycloaddition pathway via a photosensitization mechanism gives access to 1,5-diketones. The reaction has been applied to substituted styrenes and aryl- and alkyl-substituted ketones. Moreover, the method converts β-ketoesters, β-amido esters, and β-cyano ketones. Seven membered rings, a frequent structural motif of natural products, are also
1,3-二酮与苯乙烯之间的可见光介导的De Mayo反应通过光敏化机理遵循[2 + 2]环加成途径,从而可以接近1,5-二酮。该反应已应用于取代的苯乙烯以及芳基和烷基取代的酮。此外,该方法转化了β-酮酸酯,β-酰氨基酯和β-氰基酮。七元环是天然产物的常见结构基序,也可以使用这种方法获得。