作者:Laurent Pouységu、Tahiri Sylla、Tony Garnier、Luis B. Rojas、Jaime Charris、Denis Deffieux、Stéphane Quideau
DOI:10.1016/j.tet.2010.05.078
日期:2010.7
Both lambda(3)- and lambda(5)-iodanes have proven to be useful reagents in the oxygenative dearomatization of phenols, and exploitations of their chemistry in the conception of both substrate- and reagent-controlled asymmetric variants of such a transformation of great value for natural product synthesis have shown evident signs of success. Moreover, the use of stabilized IBX (i.e., SIBX) in our methodology for O-demethylation of 2-methoxyphenols, which relies on the same key oxygenating dearomatization event, is reported here to be much more efficacious than that of 1BX itself in the chemoselective one-step conversion of homovanillyl alcohol into hydroxytyrosol, and bergenin into norbergenin. (C) 2010 Elsevier Ltd. All rights reserved.