Reversal of Polarity in Masked <i>o</i>-Benzoquinones: Rapid Access to Unsymmetrical Oxygenated Biaryls
作者:Santosh Kumar Reddy Parumala、Rama Krishna Peddinti
DOI:10.1021/ol401341s
日期:2013.7.19
An unprecedented diacetoxyiodobenzene induced direct arylation of guaiacol derivatives and electron-rich arenes using a Lewis acid as an activator furnishes unsymmetrical biaryls without prefunctionalization of both coupling partners. The addition of electron-rich arenes on the a-position of electrophilic masked o-benzoquinones in an anti-Michael addition fashion affords the highly oxygenated unsymmetrical biaryls in good to excellent yields.