Base-Induced Photocyclization of 1,2-Diaryl-1-tosylethenes. A Mechanistically Novel Approach to Phenanthrenes and Phenanthrenoids
作者:Jesús F. Almeida、Luis Castedo、Dolores Fernández、Ana G. Neo、Víctor Romero、Gabriel Tojo
DOI:10.1021/ol0357954
日期:2003.12.1
phenanthrenes and heterocyclic analogues. These results are consistent with a mechanism involving the base-induced elimination of p-toluenesulfinic acid from an intermediate 9-tosyl-4a,4b-dihydrophenanthrene, formed by photochemical cyclization of the starting 1,2-diaryl-1-tosylstilbenes. [reaction: see text]
在碱的存在下,用紫外光照射许多1,2-二芳基-1-甲苯磺基苯甲酸酯,得到相应的菲和杂环类似物。这些结果与一种机理有关,该机理涉及从中间体9-甲苯基-4a,4b-二氢菲中碱诱导的对甲苯磺酸的消除,该中间体是通过对起始的1,2-二芳基-1-甲苯磺基苯进行光化学环化而形成的。[反应:看文字]