Catalytic Asymmetric Synthesis of α,α-Difluoromethylated and α-Fluoromethylated Tertiary Alcohols
作者:Wei-Sheng Huang、Marie-Léonie Delcourt、Xavier Pannecoucke、André B. Charette、Thomas Poisson、Philippe Jubault
DOI:10.1021/acs.orglett.9b02792
日期:2019.9.20
The catalyticasymmetricsynthesis of α,α-difluoromethylated tertiary alcohols is described, using an asymmetric dihydroxylation reaction. This protocol using either the AD-mix-α or AD-mix-β allowed an easy access to these valuable fluorinated chiral building blocks, which have been obtained with excellent yields and er. In addition, the reaction was extended to the α-fluoromethylated analogues.
Non-catalytic conversion of C–F bonds of gem-difluoromethylene derivatives to C–H bonds with lithium aluminum hydride under room temperature
作者:Jing-Jing Wu、Jian-Hang Cheng、Jian Zhang、Li Shen、Xu-Hong Qian、Song Cao
DOI:10.1016/j.tet.2010.11.052
日期:2011.1
An unexpected hydrodefluorination of unactivated aliphatic C-F bonds of CF2 derivatives with LiAlH4 at room temperature without any added metal catalyst was reported. Deuterium-labeling experiments suggested that the hydrogens introduced into the products originated from LiAlH4. (C) 2010 Elsevier Ltd. All rights reserved.