trianilinoborane (3) with LiBu in 1:1 and 1:2 ratios showed that the deprotonation was accompanied by the formation of anilino(butyl)borates. Treatment of the dilithio derivative of 3 with Me3SnCl afforded B[N(SnMe3)Ph]3 (23), a result of substituent exchange. Tris(2-pyridylamino)borane (4), with a planar skeleton, reacted with BuLi both by deprotonation and by B−N bond cleavage. The metallated triaminoborane crystallized