Synthesis of Binam‐P Derived C 2 ‐Symmetric bis‐Iminophosphonamide Ligands. Molecular Structure of [( R )‐Binam(Ph 2 PN(H) t Bu) 2 ]

The Staudinger reaction of organic azides t BuN 3 , 1‐Ad‐N 3 , and DippN 3 (Dipp = 2,6‐diisopropylphenyl) with ( R )‐ N , N ′‐ bis (diphenylphosphanyl)‐2,2′‐diamino‐1,1′‐binaphthyl [( R )‐Binam‐P], obtained by an optimized procedure from ( R )‐(+)‐Binam, Ph 2 PCl, and Et 3 N in DCM, leads to preparation of a series of new C 2 ‐symmetric bis‐iminophosphonamide ligands [( R )‐Binam(Ph 2 PN(H)R) 2 ] [R = t Bu ( 1 ), Ad ( 2 ), and Dipp ( 3 )]. The molecular structure of 1· 2DMSO was confirmed by X‐ray structure analysis.