“…A tentative synthesis of 1 through N-propargylation of 4 -(pyrrol-2-yl)-2,2 :6 ,2terpyridine is already reported in the literature [13]. The synthetic pathway that was explored relies on the N-alkylation of the pyrrole ring with propargyl bromide in a strong basic medium [14]. Nevertheless, this approach failed in providing 1, and only isomeric 4 -(N-(propan-1,2-dienyl)pyrrol-2-yl)-2,2 :6 ,2 -terpyridine 2 was obtained (Figure 2).…”