The synthesis of spiro[quinoline-2,4'-piperidines] by using a radical or a Heck reaction, as the key step, is described. (C) 1998 Elsevier Science Ltd. All rights reserved.
Heck Reaction <i>versus</i> Free Radical Reaction for the Synthesis of Spiro[indoline-2,4′-piperidines]
Spiro[indoline-2,4′-piperidines] can be prepared from 2-bromoaniline by using a Heck reaction or a free radical reaction as the key step. The radical process produces better yields of spiro[indoline-2,4′-piperidines] than the Heck process.