De Novo Synthesis of Phenols and Naphthols through Oxidative Cycloaromatization of Dienynes
作者:Ming-Guang Rong、Tian-Zhu Qin、Xin-Rui Liu、Hong-Fa Wang、Weiwei Zi
DOI:10.1021/acs.orglett.8b02786
日期:2018.10.5
In this work, a rhodium-catalyzed oxidative cycloaromatization of dienynes, which provides a highly straightforward and efficient way to access polysubstituted naphthols and phenols under mild conditions, is described. Challenged electron-withdrawing groups are well tolerated in this protocol, and late-stage phenyl ring formation is demonstrated.
NaHSO<sub>4</sub>/SiO<sub>2</sub> catalyzed generation of <i>o</i>-quinone/ <i>o</i>-thioquinone methides: synthesis of arylxanthenes/ arylthioxanthenes <i>via</i> oxa-6π-electrocyclization
作者:Muthupandi Karthick、Edwin Konikkara Abi、Nagamalla Someshwar、Savarimuthu Philip Anthony、Chinnasamy Ramaraj Ramanathan
DOI:10.1039/d0ob01868f
日期:——
molecules of natural and biological significance. Among several synthetic protocols, the acid catalyzed generation of ortho-quinone methides from suitably substituted phenols is a promising method for further exploitation in organic synthesis. Such an interesting reactive species is conveniently employed in the synthesis of conformationally restricted triarylmethane derivatives such as 12/9-arylxanth