Highly efficient synthesis of polysubstituted 1,2-dihydroquinolines via tandem reaction of α-ketoesters and arylamines catalyzed by fluorous hydrazine-1,2-bis(carbothioate) and NCS
作者:Yi-Wei Zhu、Jin-Long Qian、Wen-Bin Yi、Chun Cai
DOI:10.1016/j.tetlet.2012.11.143
日期:2013.2
A simple and convenient tandem reaction of alpha-ketoesters with primary or secondary aromatic amines for the synthesis of polysubstituted 1,2-dihydroquinolines has been developed. The catalytic system (fluorous hydrazine-1,2-bis(carbothioate)/NCS) of the reaction has the advantages of operational simplicity, high efficiency, as well as easy recyclability. (c) 2012 Elsevier Ltd. All rights reserved.
Efficient Synthesis of α-Chloroketones Catalyzed by Fluorous Hydrazine-1,2-Bis(Carbothioate) Organocatalyst
作者:Yi-Wei Zhu、Yi-Xin Shi
DOI:10.1007/s10562-015-1676-3
日期:2016.3
A novel and recoverable fluorous hydrazine-carbothioate organocatalyst was prepared. It could catalyze alpha-chlorination of alkyl ketones with N-chlorosuccinimide as chlorine source under mild reaction conditions. The reaction afforded the corresponding alpha-chlorinated carbonyl compounds with excellent yields at rapid reaction speed.
A recyclable fluorous hydrazine-1,2-bis(carbothioate) with NCS as efficient catalysts for acetalization of aldehydes
作者:Yi-Wei Zhu、Wen-Bin Yi、Chun Cai
DOI:10.1039/c3nj41182f
日期:——
A fluorous hydrazine-carbothioate organocatalyst was prepared. Together with NCS, the catalyst showed a good activity in acetalization of aldehydes and alcohols. It could be recovered from the reaction mixture by fluorous solid-phase extraction (F-SPE) with excellent purity for direct reuse.