Gold catalyzed hydrofluorination of propargyl alcohols promoted by fluorine-hydrogen bonding
作者:Hui Yang、Shaowen Wang、Jie Wang、Xiangsheng Xu、Xiaoqing Li
DOI:10.1039/d3cc02275g
日期:——
The hydroxyl group was discovered to promote gold catalyzed hydrofluorination of alkynes via hydrogen bonding interaction. Based on this strategy, propargyl alcohols could be hydrofluorinated smoothly using Et3N·3HF under acidic additive-free conditions, which provided a straightforward alternative protocol for the synthesis of 3-fluoroallyl alcohols.
Preparation of Fluoroalkenes via the Shapiro Reaction: Direct Access to Fluorinated Peptidomimetics
作者:Ming-Hsiu Yang、Siddharth S. Matikonda、Ryan A. Altman
DOI:10.1021/ol401637n
日期:2013.8.2
Fluoroalkenes represent a useful class of peptidomimetics with distinct biophysical properties. Current preparations of this functional group commonly provide mixtures of E- or Z-fluoroalkene diastereomers, and/or mixtures of nonfluorinated products. To directly access fluoroalkenes in good stereoselectivity, a Shapiro fluorination reaction was developed. Fluoroalkene products were accessed in one- or two-step sequences from widely available ketones. This strategy should be useful for the preparation of fluorinated analogs of peptide-based therapeutics, many of which would be challenging to prepare by alternate strategies.