Radical Cyclization of Epoxy Vinyl- and Allylsulfones Promoted by Titanocene Chloride
作者:A. Fernández-Mateos、S. Encinas Madrazo、P. Herrero Teijón、R. Rubio González
DOI:10.1021/acs.joc.5b00206
日期:2015.5.1
A titanocene-mediated intramolecular radical addition of different epoxy vinyl- and allylsulfones has been achieved. Five- and Six-membered ring products were obtained in good to excellent yields in the presence of both 2.2 and 0.2 equiv of Cp2TiCl. A novel double-activation strategy allowed us to achieve small-size rings such as cyclobutanes and cyclopropanes.