1,3-Dipolar cycloaddition reactions of C-(1-methylindol-3-yl)-N-methyl
nitrone (1) with carbonyl substituted dipolarophiles lead to the forma
tion of indolyl-isoxazolidines 3-6. Further reduction of the cycloaddu
cts bearing a 5-methoxycarbonyl substituent give the pyrrolidinones 8,
10. The stereoselectivity of the reactions and the structure elucidati
on of the products are discussed. Copyright (C) 1996 Elsevier Science
Ltd