P(NMe<sub>2</sub>)<sub>3</sub>-Mediated Reductive Intramolecular Annulation of Benzoylformates Tethered with a Trisubstituted Alkene Unit and Synthesis of 2,2-Disubstituted 2<i>H</i>-Chromenes
作者:Jiayong Zhang、Yuhe Qiu、Biao Zhang、Zhiqiang Huang、Zhengjie He
DOI:10.1021/acs.orglett.1c00286
日期:2021.3.5
report, a P(NMe2)3-mediated reductive intramolecular annulation reaction has been developed with benzoyl formates bearing a trisubstituted alkene unit. It provides a facile synthesis of highly functionalized 2,2-disubstituted 2H-chromenes with a broad substratescope and high efficiency. Experimental results suggest this annulation reaction proceeds via a cascade of alkene isomerization/vinyl o-quinone