2-Diphenylphosphinobenzaldehyde is a phosphine ligand with the formula (C<sub>6</sub>H<sub>5</sub>)<sub>2</sub>PC<sub>6</sub>H<sub>4</sub>CHO. It is a yellow solid that dissolves in common organic solvents.
2-Diphenylphosphinobenzaldehyde was first prepared by the reaction of chlorodiphenylphosphine with the Grignard reagent derived from the protected 2-bromobenzaldehyde, followed by deprotection. It can also be derived from (2-lithiophenyl)diphenylphosphine.
The compound condenses with a variety of amines to give phosphine-imine and phosphine-amine ligands.