Arnott, G.; Brice, H.; Clayden, J.; Blaney, E., Electrophile-Induced Dearomatizing Spirocyclization of N-Arylisonicotinamides: A Route to Spirocyclic Piperidines, Organic Letters, 2008, 10(14), 3089-3092
link to article [1]
Links:
[1] http://pubs.acs.org/cgi-bin/abstract.cgi/orlef7/2008/10/i14/abs/ol801092s.html