Abstract
Lithium dimethyldiphenylphosphonium diylide reacts with electrophiles such as Ph 2PCl, Ph 2P(O)Cl or Ph 2P(S)Cl to give monoylide intermediates allowing by reaction with benzaldehyde the synthesis of the styrylphosphines or the corresponding oxides or sulfides. This efficient one-pot method permits at choice the selective synthesis of each isomer Z or E and corroborates further the isomeric identification of the styrylphosphines.
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