Synthesis of (Diphenylphosphinoyl)methyl Vinyl Sulfides, Symmetric and Asymmetric Divinyl Sulfides from Bis[(diphenylphosphinoyl)methyl] Sulfide - Silveira, Claudio C.; Rinaldi, Francieli; Bassaco, Mariana M.; Guadagnin, Rafael C.; Kaufman, Teodoro S. (Synthesis, 2011)