Oxidation of a variety of N-allyl prolinol derivatives gave amine N-ox
ides with complete diastereoselectivity. On warming, these amine N-oxi
des undergo [2,3]-Meisenheimer rearrangement to give O-allyl hydroxyla
mines, albeit with low diastereoselectivity. Attempts to promote asymm
etric N-oxidation of N-allyl tertiary amines with a variety of asymmet
ric oxidants produced only racemic N-oxides. (C) 1998 Elsevier Science
Ltd. All rights reserved.