Visible-Light Photoredox Difluoromethylation of Phenols and Thiophenols with Commercially Available Difluorobromoacetic Acid
作者:Jinyan Yang、Min Jiang、Yunhe Jin、Haijun Yang、Hua Fu
DOI:10.1021/acs.orglett.7b01118
日期:2017.5.19
A simple and efficient visible-light photoredox one-pot method for difluoromethylation of phenols and thiophenols has been developed. The protocol uses commerciallyavailable, inexpensive, and easy handling difluorobromoacetic acid as the difluoromethylating agent, and the diverse O- and S-difluoromethylated products were prepared in good yields with tolerance of many functional groups.
Synthesis and conformational analysis of α,α-difluoroalkyl heteroaryl ethers
作者:Daniel B. Horne、Michael D. Bartberger、Matthew R. Kaller、Holger Monenschein、Wenge Zhong、Stephen A. Hitchcock
DOI:10.1016/j.tetlet.2009.07.060
日期:2009.9
We report the efficient synthesis of difluoroalkyl aryl ethers from the rearrangement of heteroaryl ketones and aldehydes, mediated by xenon difluoride and HF/pyridine in methylene chloride at room temperature. Computational analysis of difluoroalkylethers shows that there is potential to allow access to conformational space not accessible to the hydrogenated parent.