ZrOCl2·8H2O mediated microwave induced [3+2] cycloaddition of azomethine ylides-a facile one-pot synthesis of novel dispiroheterocycles

An efficient microwave-assisted, ZrOCl2·8H2O mediated, synthesis of novel dispiro-oxindolopyrrolidines and -pyrrolizidines was accomplished through [3+2] cycloaddition reaction of azomethine ylides derived from acenaphthenequinone and sarcosine/l-proline with (E)-2-oxoindolino-3-ylidene acetophenones in good yields.