Synthesis of Alkyl Bis(trifluoromethyl)carbinols via Fe-LMCT-Enabled Hydrobis(trifluoromethyl)carbinolation of Alkenes
Huaixuan Guo, Wenting Lai, Jie Ni, Peng Xu
Abstract
Bis(trifluoromethyl)carbinols are valuable pharmacophores, yet their synthesis is challenging, largely due to a scarcity of safe and effective bis(trifluoromethyl)carbinolation reagents. Here, we realized the hydrobis(trifluoromethyl)carbinolation of alkenes, utilizing stable and readily accessible 2,2-bis(trifluoromethyl)glycolic acid as a source of both the bis(trifluoromethyl)carbinol unit and a hydrogen atom. This process leverages a photoinduced Fe-LMCT-enabled radical decarboxylation process that generates a key bis(trifluoromethyl)carbinol radical intermediate. Our mild protocol facilitates the synthesis of a diverse range of alkyl bis(trifluoromethyl)carbinols, including structurally complex molecules with pharmaceutical relevance.