Synthesis of Aryl-Substituted Triamidoamine Ligands and Molybdenum(IV) Complexes that Contain Them

Compounds of the type [(ArNHCH 2 CH 2 ) 3 N] (Ar = phenyl (H 3 [ 1a ]), 4-fluorophenyl (H 3 [ 1b ]), 4- tert -butylphenyl (H 3 [ 1c ]), 3,5-dimethylphenyl (H 3 [ 1d ]), 2-methylphenyl (H 3 [ 1e ]), and mesityl (H 3 [ 1f ])) have been synthesized by the Pd-catalyzed coupling of (H 2 NCH 2 CH 2 ) 3 N with aryl bromides. Molybdenum methyl complexes containing [ 1a − d ] 3 - can be prepared by adding 4 equiv of methyllithium to a mixture of the ligand and MoCl 4 (THF) 2; the corresponding chloride complexes are obtained upon addition of 2,6-lutidinium chloride to the methyl complexes.