Fig. 4: Synthesis and characterization of C-PF and S-PF.
From: Expanding the chemical space of flavins with pentacyclic architecture
a A summarized synthetic route for C-PF and S-PF. Full synthetic schemes are described in the Supplementary Information. b Solid-state structure of C-PF. c Solid-state structure of S-PF. Thermal ellipsoids are set at the 50% probability level (C, gray; N, blue; O, red; S, yellow; H, white). The chemical bonds defining the dihedral angle are colored in red. d Normalized absorption spectra of the entire series in THF. e Normalized emission spectra of the entire series in THF. f Digital image of THF solutions taken under 365 nm light. The absorption and emission spectra and digital images for N-Ph, N-Ph(OMe), and O-PF are replotted using data in Fig. 2d, e for clearer comparison with C-PF and S-PF.
