A novel three-component reaction of anilines, formaldehyde and dimedone: simple synthesis of spirosubstituted piperidines
作者:Nikolas G. Kozlov、Aliaksei P. Kadutskii
DOI:10.1016/j.tetlet.2008.04.160
日期:2008.7
A three-component condensation of anilines with dimedone and formaldehyde leads to the formation of 3,5-dispirosubstituted piperidines. This simple reaction can serve as a convenient source of 3,5-disubstituted piperidines as well as polyfunctional 3-spirofused piperidines. (c) 2008 Elsevier Ltd. All rights reserved.
Silica supported tungstic acid (STA): an efficient catalyst for the synthesis of bis-spiro piperidine derivatives under milder condition
作者:Amol B. Atar、Yeon Tae Jeong
DOI:10.1016/j.tetlet.2012.12.105
日期:2013.3
A mild, efficient, and expeditious method has been developed for the synthesis of 3,5-dispirosubstituted piperidines via a threecomponent, one-pot cyclocondensation reaction of aromatic amines, formaldehyde, and dimedone using Silica supported tungstic acid as heterogeneous catalyst for the first time. The reaction involving formation of six new covalent bonds was conveniently promoted by Silica supported