Dimerisation of Indolizines by Palladium Coal Oxidative dimerisation of some indolizines by Pd/C in p‐xylene was undertaken in order to evaluate reaction conditions for cyclophane syntheses. Surprisingly, alkylation by the solvent occurred at the 3‐position of the indolizines 2 and 5 as a side reaction. In toluene, yields of alkylation products 4b and 8 exceeded those of dimerisation products 3 and 6. The alkylation by the solvent was fully suppressed by using chlorobenzene or chlorotoluene. Alkylation products of indolizines with p‐xylene or toluene and previously unknown dimeric indolizines are described.

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