N-Phenacylpyridinium bromide in the presence of potassium carbonate gives the indolizine 10 and pyridinium salt 12 with the aldehyde 1 as well as the acid 2, azirine 14 with the nitrile 3, and zwitterion 16 with the ester 4. The pyridinium bromide 12 is converted into 10, and a mixture of 5 and 10 on refluxing in pyridine and dimethylformamide, respectively.