Lithium tert ‐Butyl[phenyl(2,2,6,6‐tetramethylpiperidino)boryl]amide: A Versatile Reagent

A new synthesis of tmp(PhB)N( t BuNLi) ( 1 , tmp = 2,2,6,6‐tetramethylpiperidino) is presented. Compound 1 reacts with many group 13−15 halides, as well as with BH 3 ·THF, to afford, in most cases, compounds of the type tmp(PhB)N t Bu−ER n −1 (E = B, Al, Ga, In, Ge, Sn, P, As, Sb, and R = H, Me, Hal). The borane, alane, gallane and indane derivatives have cyclic structures, as shown by X‐ray structure determinations, whereas ER n −1 = GeCl 3 , SnMe 3 , SnMe 2 Cl, SnCl, catecholatophosphanyl, AsCl 2 and SbCl 2 are noncyclic, although the arsane and stibane derivatives show weak intramolecular E−N coordination to the tmp−N atom. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)