Novel route to spiropiperidines using N-methyl-4-piperidone, malononitrile and electrophiles
摘要:
A new pathway to spiropiperidine rings via sequential one pot reaction of N-methyl-4-piperidone, malononitrile, and electrophiles or Michael acceptor in the presence of triethyl amine in ethanol under reflux condition is reported. (C) 2012 Elsevier Ltd. All rights reserved.
An efficient synthesis of fluorine-containing substituted spiro[piperidine-4,4′-pyrano[3,2-c]quinoline]-3′-carbonitrile by nonconventional methods
摘要:
A series of fluorine-containing substituted spiro[piperidine-4,4'-pyrano[3,2-c]quinolines] were synthesized through a rapid one-pot multicomponent reaction under microwave irradiation and sonication. The method has the advantages of excellent yields (80-96%) and short reaction time (3-10 min). We provide a series of fluorinated quinoline derivatives interesting for biological screening tests. (C) 2007 Published by Elsevier B.V.