Synthesis and biological evaluation of 1,7,8,8a-tetrahydro-3H-oxazolo[3,4-a]pyrazin-6(5H)-ones as antitumoral agents
摘要:
A series of 1,7,8,8a-tetrahydro-3H-oxazolo[3,4-a]pyrazin-6(5H)-ones has been synthesized by an intramolecular, palladium(II) catalyzed, aminooxygenation of alkenyl ureas, readily available from glycine allylamides as starting materials. Biological tests showed that the obtained compounds are endowed with an interesting antitumoral activity against two human thyroid cancer cell lines, namely FTC-133 and 8305C, by promoting the apoptotic pathway and DNA fragmentation. (C) 2013 Elsevier Ltd. All rights reserved.
Selective Intramolecular Palladium(II)-Catalyzed Aminooxygenation<i>vs.</i>Diamination of Alkenylureas: Efficient Microwave-Assisted Reactions to Bicyclic Piperazinones
作者:Gianluigi Broggini、Vincenzina Barbera、Egle M. Beccalli、Ugo Chiacchio、Andrea Fasana、Simona Galli、Silvia Gazzola
DOI:10.1002/adsc.201300104
日期:2013.5.17
Alkenylureas arising from glycineallylamides were proven to be suitable substrates for the synthesis of bicyclic five‐membered ring‐fused piperazinones. The reported intramolecular domino processes, performed under oxidative conditions with bis(acetonitrile)palladium dichloride as catalyst and copper(II) chloride in a stoichiometric amount by microwave activation, were completely selective, involving