An easy route to exotic 9-epimers of 9-amino-(9-deoxy) cinchona alkaloids with (8S, 9R) and (8R, 9S)-configurations through two inversions of configuration
摘要:
Four exotic chiral organocatalysts, 9-amino-(9-deoxy) cinchona alkaloids with (8S, 9R) and (8R, 9S)-configurations, were conveniently synthesized for the first time in 27-72% total yields through two conversions of configuration at the 9-stereogenic centers of commercially available cinchona alkaloids. (C) 2013 Xue-Bing Ma and Ming Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Copper-Catalyzed Intermolecular Trifluoromethylazidation of Alkenes: Convenient Access to CF<sub>3</sub>-Containing Alkyl Azides
作者:Fei Wang、Xiaoxu Qi、Zhaoli Liang、Pinhong Chen、Guosheng Liu
DOI:10.1002/anie.201309991
日期:2014.2.10
A novel copper‐catalyzed intermoleculartrifluoromethylazidation of alkenes has been developed under mild reaction conditions. A variety of CF3‐containing organoazides were directly synthesized from a wide range of olefins, including activated and unactivated alkenes, and the resulting products can be easily transformed into the corresponding CF3‐containing amine derivatives.