Synthesis of <i>C</i>-Alkyl Glycosides from Alkyl Bromides and Glycosyl Carboxylic Acids via Ni/Photoredox Dual Catalysis
Wei‐Yu Shi, Jiajun Ma, Hu-Yi Li, Dongping Chen, Xue‐Yuan Liu, Yong‐Min Liang
Abstract
C -Alkyl glycosides, an important class of C-glycosides, are widely found in various drugs and natural products. The synthesis of C -alkyl glycosides has attracted considerable attention. Herein, we developed a Ni/photoredox catalyzed decarboxylative C ( sp 3 )– C ( sp 3 ) coupling reaction of stable glycosylcarboxylic acids with simple aliphatic bromides to generate C-alkyl glycosides. The method successfully linked several functional molecular fragments (natural products or drugs) to a sugar moiety, showing the extensive application prospects of this transformation. Controlled experiments and DFT calculations demonstrated that the reaction pathway contains a free radical process, and a possible mechanism is proposed.