Kaloglu, MuratSahin, NeslihanSemeril, DavidBrenner, EricMatt, DominiqueOzdemir, IsmailKaya, Cemal2024-08-042024-08-0420151434-193X1099-0690https://doi.org/10.1002/ejoc.201501070https://hdl.handle.net/11616/97055Unsymmetrical imidazolium salts, each having one nitrogen atom (N1) substituted by a cavity-shaped TPR group (TPR = 2,8,14,20-tetrapentylresorcinaren-5-yl), were tested in situ as proligands for the copper-catalysed allylic arylation of cinnamyl bromide with arylmagnesium halides. The catalytic systems produced mixtures of linear (l) and branched (b) arylated compounds in variable proportions, with the b/l ratio being the highest (78:22) for the most crowded imidazolium salt used, namely that in which the second nitrogen atom (N2) was substituted by a mesityl group. An N-heterocyclic carbene complex obtained from one of the imidazolium salts was characterised by an X-ray diffraction study.eninfo:eu-repo/semantics/closedAccessCavitandsCalixarenesCarbenesCopperAllylic substitutionRegioselectivityArticle2015337310731610.1002/ejoc.2015010702-s2.0-84947474575Q2WOS:000364968800013Q2