In the title compound, C(31)H(40)NO(2)P, the P atom has a distorted tetra-hedral stereochemistry [bond-angle range about P = 103.33 (6)-115.24 (15)°] and has R(P) chirality, which was confirmed crystallographically. The dihedral angles between the P-bonded phenyl ring and the other two phenyl rings are 40.4 (3) and 12.2 (2)°. In the crystal, a C-H⋯O inter-action links mol-ecules into chains which extend along [100].