Catalytic addition of amines to carbodiimides by bis(β-diketiminate)lanthanide(<scp>ii</scp>) complexes and mechanistic studies
作者:Mingqiang Xue、Yu Zheng、Yubiao Hong、Yingming Yao、Fan Xu、Yong Zhang、Qi Shen
DOI:10.1039/c5dt03674g
日期:——
Reduction reactions of bis(β-diketiminate)lanthanide(III) chlorides formed in situ by reactions of anhydrous LnCl3 with 2 equiv. of sodium salt of the β-diketiminate ligand in THF with a Na/K alloy afforded a series of bis(β-diketiminate)lanthanide(II) complexes LnL2(THF)n (L = L2,6-Me2 = [N(2,6-Me2C6H3)C(Me)]2CH−, n = 1, Ln = Eu (1); L = L2,4,6-Me3 = [N(2,4,6-Me3C6H2)C(Me)]2CH−, n = 1, Ln = Eu (2);
无水LnCl 3与2当量的反应原位形成的双(β-二酮基)镧系元素(III)氯化物的还原反应。用Na / K合金在THF中合成β-二酮基配体的钠盐,得到一系列双(β-二酮基)镧系元素(II)络合物LnL 2(THF)n(L = L 2,6-Me 2 = [ N(2,6-ME 2 ç 6 ħ 3)C(Me)中] 2 CH - ,ñ = 1,Ln为铕(1); L = L 2,4,6-ME 3 = [N(2, 4,6--ME 3 ç 6 ħ2)C(Me)中] 2 CH - , Ñ = 1,Ln为铕( 2); L = L 2,6-的iPr 2 = [N(2,6-我镨2 ç 6 ħ 3)C(Me)中] 2 CH - , Ñ = 0,Ln为铕( 3),钐( 4); L = L 2,6-ipr 2 Ph = [(2,6- i Pr 2 C 6 H 3)NC(Me)CHC(Me)N(C 6 H 5)] -,