Abstract
3H-Pyrrolizine has been converted into dimethyl cycl[3,2,2]azine-5,6-dicarboxylate, 6-azacycl[3,2,2]azine, 6-nitrocycl[3,2,2]azine, and cyclopenta[h]cycl[4,2,2]azine: the last compound is a 14π-analogue of azulene.

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