“…During their study to prepare an intermediate to be attached to a solid support, they found an interesting side product with a seven-membered ring [11]. In the eleventh paper, the formation of an isomeric mixture of dienynes, instead of a diallene, was detected during a reduction reaction performed on the 1,1,2,2,7,7,8,8-octaethoxyocta-3,5-diyne [12]. In the twelfth paper, the authors reported on the synthesis of a new pyrrole-substituted terpyridine derivative that possessed an allene moiety.…”