title: Radical cyclization of epoxy vinyl- and allylsulfones promoted by titanocene chloride.
abstract: 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.
authors.affiliation: Departamento de Química Orgánica, Facultad de CC, Químicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Fernández-Mateos
authors.affiliation: Departamento de Química Orgánica, Facultad de CC, Químicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
authors.forename: S Encinas
authors.initials: SE
authors.lastname: Madrazo
authors.affiliation: Departamento de Química Orgánica, Facultad de CC, Químicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
authors.forename: P Herrero
authors.initials: PH
authors.lastname: Teijón
authors.affiliation: Departamento de Química Orgánica, Facultad de CC, Químicas, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
authors.forename: R Rubio
authors.initials: RR
authors.lastname: González