Convenient Horner-Wittig-based synthetic approaches to
the preparation of (diphenylphosphinoyl)methyl vinyl sulfides as well
as symmetrically and unsymmetrically substituted divinyl sulfides,
are described. The syntheses involve the use of the easily available
bis[(diphenylphosphinoyl)methyl] sulfide as a
common starting material and sodium hydride as base, in tetrahydrofuran.
sulfur - Wittig reaction - alkenation - ketones - aldehydes