A facile entry into a novel class of dispiroheterocyclic framework through 1,3-dipolarcycloaddition of azomethine ylides with 3-arylidene-4-chromanones as dipolarophiles

The 1,3-dipolar-cycloaddition reaction of azomethine ylides, generated through decarboxylation route, with (E)-3-arylidene-4-chromanones as dipolarophiles has been investigated. A new class of functionalized dispiroheterocyclic compounds bearing chromanone and acenaphthenequinone framework has been synthesized and the structures were established by spectroscopic techniques as well as single crystal X-ray analysis.