It is hardly suspicious. The only suspicious use I can think of for it would be the practically never used transformation to allylbenzene: https://www.thevespiary.org/rhodium/Rhodium/chemistry/cinnamaldehyde.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/cinnamaldehyde.html)
Please tell, what do you want the amine for? N-cinnamyl-4-piperidone?
Well, my goal is the synthesis of a phenoperidine analogue, where the Ph-CHOH-CH2-CH2- group is replaced by a 2-thienyl-CH=CH-CH2- group.
According to Dorvault, L 'officine, 23 th ed., p 1263: phenoperidine = 25 - 50 x morphine in humans.
No piperidone will be needed: Post 404354 (https://www.thevespiary.org/talk/index.php?topic=6896.msg40435400#msg40435400)
(Megatherium: "1-(2-phenethyl)-4-phenyl-4-acetoxypiperidine synth", Chemistry Discourse)