A wide
range of indolizines with allenes proceeded smoothly under
mechanochemically induced conditions via a [3+2] annulation process,
affording various substituted pyrrolo[2,1,5-cd]indolizines
in good yields. The reaction efficiency was greatly improved by using
piezoelectric material as the charge transfer catalyst. The photophysical
properties of the resulting pyrrolo[2,1,5-cd]indolizine
were characterized.
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