Figure 5: NMR titration Plots.

(a) Part of 1H NMR titration of 1 with KOtBu in DMSO-d6, (b,c) are part of 1H NMR titration of 1 with TFA in CDCl3.

(a) Part of 1H NMR titration of 1 with KOtBu in DMSO-d6, (b,c) are part of 1H NMR titration of 1 with TFA in CDCl3.