How to prepare TfOH, HBr or HCl salt of BINOL derived phosphoramide containing one pyridinium ring?

I want to protonate the pyridinium nitrogen (BINOL derived phosphoramide containing pyridine ring) to prepare a salt. I do the reaction in dry DCM at room temperature using TfOH, HCl in Dioxane (4...

02 August 2017 3,251 3 View