Manganese(III)-mediated oxidative annulation of vinylidenecyclopropanes with 1,3-dicarbonyl compounds
作者:Wei Yuan、Yin Wei、Min Shi
DOI:10.1016/j.tet.2011.06.109
日期:2011.9
Manganese(III)-mediated oxidative annulation of vinylidenecyclopropanes with 1,3-dicarbonyl compounds in acetonitrile/acetic acid produces the corresponding functionalized dihydrofuran derivatives in moderate to good yields under mild conditions. The substrate scope has been examined and a plausible reaction mechanism has been also proposed on the basis of experimental results and previous literature
Reactions of vinylidenecyclopropanes with xanthydrol and xanthene
作者:Wei Yuan、Min Shi
DOI:10.1016/j.tet.2010.07.004
日期:2010.8
Vinylidenecyclopropanes undergo ring-opening reactions with xanthydrol in the presence of BF(3)center dot OEt(2) or with xanthene in the presence of DDQ at 0 degrees C in 1,2-dichloroethane to give the corresponding conjugate triene derivatives in moderate to good yields. Plausible reaction mechanisms have been discussed on the basis of previous literature and the control experiments. The further transformation of these trienes has been disclosed in DCE in the presence of BF(3)center dot OEt(2) along with a plausible reaction mechanism. (C) 2010 Elsevier Ltd. All rights reserved.