79370-14-2Relevant academic research and scientific papers
Aromatic Phosphines with Second Order Substituents, XVI. - Phenylogous PO-activated Olefination: Synthesis of 4'-Donator Substituted 4-(Diphenylphosphinyl)stilbenes
Schiemenz, Guenter Paulus,Finzenhagen, Manfred
, p. 1476 - 1484 (2007/10/02)
Being a -M substituent, the 4-diphenylphosphinyl group acidifies the methyl group of toluene to a similar degree as a 4-cyano group.The carbanion formed by deprotonation reacts with N-benzylidene anilines to yield 4-(diphenylphosphinyl)stilbenes.In these, UV-spectroscopically the phosphorus on the one hand behaves like a -M substituent, on the other hand it acts as a barrier to through-conjugation.
