An efficient method for the preparation of 2,2,4-trisubstituted 1,2-dihydroquinolines using catalytic amount Bi(OTf)3 as catalyst
作者:Zeynep Gültekin、Wolfgang Frey
DOI:10.3998/ark.5550190.0013.822
日期:——
Substituted 1,2-dihydroquinolines have been synthesised from substituted anilines and methyl pyruvate usingcatalyticamounts of commercially available Bi(OTf)3 as a catalyst under microwave-assisted conditions. This method is simple, easy to work up, inexpensive, with a broad substrate scope and short reaction times. The reaction provides 1,2-dihydroquinolines (19 examples) in good yields (34-97%
Highly efficient synthesis of polysubstituted 1,2-dihydroquinolines via cascade reaction of α-ketoesters with arylamines mediated by iodine
作者:Bao-Qiang Zhang、Yuan Luo、Yan-Hong He、Zhi Guan
DOI:10.1016/j.tet.2014.01.061
日期:2014.3
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.