One-pot synthesis of multifunctionalized cyclopropanes
作者:Meng-Yang Chang、Yi-Chia Chen、Chieh-Kai Chan
DOI:10.1016/j.tet.2014.02.024
日期:2014.4
A facile one-step synthetic protocol toward multifunctionalized cyclopropanes 4 is developed from substituted chalcones 1 and sulfones 2 in good yields via a [2C+1C] annulation. (c) 2014 Elsevier Ltd. All rights reserved.
One-Pot Synthesis of Polysubstituted Indolizines by an Addition/Cycloaromatization Sequence
作者:Murat Kucukdisli、Till Opatz
DOI:10.1021/jo400992n
日期:2013.7.5
Indolizines carrying various substituents in positions 5-8 were obtained from readily available 2-(1H-pyrrol-1-yl)nitriles and alpha,beta-unsaturated ketones or aldehydes in a one-pot procedure. Michael addition of the deprotonatecl aminonitriles to the acceptors followed by acid catalyzed electrophilic cyclization produces 5,6-dihydroindolizine-5-carbonitriles. From these stable intermediates, substituted indolizines were obtained via base induced dehydrocyanation.