P-31 NMR and ESI-MS studies on some intermediates of the peptide coupling reagents triphenyl-chlorophosphoranes
Gui Ji ZHOU
Li Ming HU
Yu Fen ZHAO
- 化学化工－已发表论文 
The intermediates of the Appel coupling reagents were studied in acetonitrile, dimethoxyethane and dioxane by P-31 NMR, C-13 NMR spectrum and ESI-MS. In dioxane a new high coordinated phosphorous compound with P-31 NMR shift at -39 ppm was observed. The ESI-MS showed that it could be a penta-coordinated phosphorous compound containing dioxane. The carboxyl activated intermediates were also studied in three solvents.