The synthesis of 4-isobutylbenzaldehyde, a valuable precursor for the fragrance Silvial®
(3-(4-isobutylphenyl)-2-methylpropanal), is reported. Three different synthetic approaches are reported starting
either from 4-isobutylbenzoic acid (via benzyl alcohol, or via acyl chloride), or by Suzuki-Miyaura cross-coupling
reaction between 4-bromobenzaldehyde and 2-methylpropylboronic acid