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The preparation of substituted pyrrolizines through the Schmidt reaction of acyl chlorides with alkyl azides has been realized. Intramolecular capture of the isocyanate ion and N-acyliminium ion intermediates from the Schmidt process with alkene or alkyne units was achieved, and the efficiency of the conversion with respect to ring construction and bond formation was demonstrated.

Graphical abstract: Intramolecular Schmidt reaction of acyl chlorides with alkyl azides: preparation of pyrrolizine by intramolecular capture of intermediates with alkenes or alkynes

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