A series of pyridyl-1-azaallyl ligand precursors (HL1–HL5) were synthesized via condensation of pyridine ketones with anilines. The alkane elimination reactions between Y(CH2SiMe3)3(THF)2 and HL4 or HL5 gave the monoalkyl complexes (L4–H)YCH2SiMe3(THF) (1) and (L5–H)YCH2SiMe3(THF) (2) supported by new tridentate pyridyl-1-azaallyl dianionic ligands. The reactions of monoalkyl complexes, 1 and 2, with one equivalent of 2,6-diisopropylaniline produced the corresponding monoanilide complexes, (L4–H)YNHAr(THF) (3) and (L5–H)YNHAr(THF) (4) (Ar = 2,6-(iPr)2C6H3), via highly selective protonolysis of the terminal alkyl Y–CH2SiMe3 bond. Complexes 1–4 are active for intramolecular hydroamination of aminoalkenes.
通过
吡啶酮与
苯胺的缩合,合成了一系列
吡啶-1-氮杂烯丙基
配体前体(HL1-HL5)。通过 Y(CH2SiMe3)3(THF)2、HL4 或 HL5 之间的
烷烃消除反应,得到了由新的三叉
吡啶-1-氮杂烯丙基二阴离子
配体支持的单烷基配合物 (L4-H)YCH2SiMe3(THF) (1) 和 (L5-H)YCH2SiMe3(THF) (2)。单烷基络合物 1 和 2 与一个当量的
2,6-二异丙基苯胺反应,通过末端烷基 Y-CH2SiMe3 键的高选择性质子分解,生成相应的单
苯胺络合物 (L4-H)YNHAr(THF) (3) 和 (L5-H)YNHAr(THF) (4)(Ar = 2,6-(iPr)2C6H3)。配合物 1-4 对
氨基烯的分子内氢化具有活性。