Fig. 2: Possible reaction pathways.
From: Selective hydrodeoxygenation of α, β-unsaturated carbonyl compounds to alkenes

A Reaction pathway of α, β-unsaturated carbonyl compounds (R1 = Ar, furyl; R2 = Ar, H, CH3). B Reaction pathway of cinnamaldehyde. 1a cinnamaldehyde (CAL), 1b hydrocinnamaldehyde (HCAL), 1c cinnamyl alcohol (COL), 1d hydrocinnamyl alcohol (HCOL), 1e 1-propenylbenzene, 1f alylbenzene, 1g 1-propylbenzene.