Figure 9.

Enlarged regions of interest of¹H‐¹³C HR‐MAS HSQC NMR spectra recorded in DMF‐d₇ of (a) tricyclic amide linker, (b) on‐resin peptide, and (c) crude peptide with assignment of resonances of the main product. Resonances assigned to the six‐ring product in (b) and (c) are labeled by arrows, resonances assignable to the tricyclic amide linker resin in the HR‐MAS NMR spectra are marked with circles. The additional correlation at 3.76/56.8 ppm in (a) is assigned to the α amide position of phenylalanine