Synthesis of Monofluoroalkenes through Visible-Light-Promoted Defluorinative Alkylation of <i>gem</i>-Difluoroalkenes with 4-Alkyl-1,4-dihydropyridines
作者:Hai-Wu Du、Jing Sun、Qi-Sheng Gao、Jing-Yun Wang、He Wang、Zhaoqing Xu、Ming-Dong Zhou
DOI:10.1021/acs.orglett.0c00134
日期:2020.2.21
In this study, a facile and efficient method to synthesize monofluoroalkenes by photoredox catalytic defluorinative alkylation of gem-difluoroalkenes with 4-alkyl-1,4-dihydropyridines under mild conditions (room temperature) is described. This novel strategy is applicable for a broad range of gem-difluoroalkene substrates with good functional group tolerance and a variety of 4-alkyl-1,4-dihydropyridines (including primary, secondary, and even tertiary alkyl radicals). Moreover, it also allows the challenging radical coupling with glycosyl-based 4-alkyl-1,4-dihydropyridines (DHPs) to synthesize monofluoroalkenylated saccharides.