Fig. 3. Mechanistic investigations and synthetic application. DTBP = 2,6-di-tert-butylpyridine. (A) UV-vis absorption spectra of reaction components. (B) UV-vis spectral changes observed upon photolysis of a mixture of 1 (1.0 mM), 2 (2.5 mM), Cu(OTf)2 (2.5 mM), LiOMe (1.0 mM), and DTBP (2.0 mM) in MeCN under purple LEDs irradiation (0–64 min). (C) Deuterodecarboxylation. (D) Proposed reaction mechanism. (E) Decarboxylative C–N cross-coupling with sodium saccharin as the N-nucleophile.
