S. Torii et al., A VERSATILE CYCLOADDITION FOR THE GENERATION OF PYRROLIDINE DERIVATIVES VIA C-N-C 1,3-DIPOLES, Chemistry Letters, (9), 1996, pp. 747-748
The condensation of N-(trimethylsilylmethyl)benzylamine and aldehydes
spontaneously gave azomethine ylides, which react with electron defici
ent olefins to yield cycloadducts under mild conditions.