Unexpected Tandem Ylide Annulation Reaction for Controllable Synthesis of 2<i>H</i>-Chromenes and 4<i>H</i>-Chromenes
作者:Long-Wu Ye、Xiu-Li Sun、Chun-Yin Zhu、Yong Tang
DOI:10.1021/ol0615174
日期:2006.8.1
An unexpected tetrahydrothiophene-catalyzed ylide annulation reaction, via tandem Michael addition/elimination/substitution, for the controllable synthesis of 2H-chromenes and 4H-chromenes has been developed.