Synthesis of 4-substituted catechols with side-chains of different C[double bond, length as m-dash]C bond number as urushiol analogues and their anticorrosion performance

4-Substituted catechols with different C[double bond, length as m-dash]C bonds as urushiol analogues were synthesized through the a three-step route including reductive amination reaction of 3,4-dihydroxybenzaldehyde with