Hafnium (IV) bis(perfluorooctanesulfonyl)amide-catalyzed one-pot synthesis of substituted quinolines in fluorous media
作者:Ming-Gui Shen、Chun Cai、Wen-Bin Yi
DOI:10.1002/jhet.125
日期:2009.7
Hafnium (IV) bis(perfluorooctanesulfonyl)amide (Hf(NPf)4) catalyzed the one-potsynthesis of substitutedquinolines in fluorousmedia. By simple phase separation, the fluorous phase containing the catalyst can be used several times. J. Heterocyclic Chem., (2009).
We have demonstrated cascade and one-pot reactions, which constitute inverse electron demand hetero-Diels-Alder reaction and oxidative aromatization, to provide substituted quinolines to form aryl aldimines and allylsilanes. The cascade process involves an auto-tandem catalysis; Tf2NH activates these mechanistically distinct reactions. We have found that a multicomponent process starting from aniline, aldehyde, and allylsilane is also available. (c) 2007 Elsevier Ltd. All rights reserved.