Zhao Jian, Larock Richard C
Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
J Org Chem. 2007 Jan 19;72(2):583-8. doi: 10.1021/jo0620718.
The reaction of silylaryl triflates, CsF, and ortho-heteroatom-substituted benzoates affords a general and efficient way to prepare biologically interesting xanthones, thioxanthones, and acridones. This chemistry presumably proceeds by a tandem intermolecular nucleophilic coupling of the benzoate with an aryne and a subsequent intramolecular electrophilic cyclization.
甲硅烷基芳基三氟甲磺酸酯、氟化铯与邻位杂原子取代的苯甲酸酯的反应为制备具有生物学意义的呫吨酮、硫代呫吨酮和吖啶酮提供了一种通用且高效的方法。该化学过程可能是通过苯甲酸酯与芳炔的串联分子间亲核偶联以及随后的分子内亲电环化来进行的。