Ring closing metathesis of N,N-diallylanilines and a related 1,2-dihydroqui
noline. catalysed by Grubbs' catalyst, occurs in good yield at room tempera
ture furnishing 3-pyrrolines and 3-piperidines, DCM and EtOAc are the solve
nts of choice and interesting substituent effects are identified and discus
sed. (C) 1999 Elsevier Science Ltd. All rights reserved.