Multiple deprotonation of primary aromatic diamines by LiAlH4

作者：Less Robert J^*; Allen Lucy K; Steiner Alexander; Wright Dominic S

来源：Dalton Transactions, 2015, 44(9): 4141-4147.

DOI：10.1039/c4dt03802a

Reaction of LiAlH4 with 1,2-phenylenediamine (1H(4)) in THF results in formation of the metallocyclic amido-/imido complex [{Al(1H(2))}(2){Al(1H)(2)}(2)][Li(THF)(2)](4) (3), while in the presence of various Lewis base ligands 1,8-diaminonaphthalene (2H(4)) gives the amido-('ate') complexes [Al(2H(2))(2)](-)[Li(LL')](+) [L = THF, L' = PMDETA (N,N,N',N',N ''-pentamethyldiethylenetriamine)(4); L = L' = TMEDA (N,N,N',N'-tetramethylethylenediamine) (5)]. The latter complexes provide evidence of intermediates in the proposed reaction pathway for formation of the cyclic framework of the tetraanion [{Al(1H(2))}(2){Al(1H)(2)}(2)](4-) of 3.

• 出版日期2015