2-Diphenylphosphinobenzaldehyde is a phosphine ligand with the formula (C6H5)2PC6H4CHO.

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.

[1][2] 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.