Copper(II) arylhydrazone complexes as catalysts for C H activation in the Henry reaction in water
作者:Zhen Ma、Atash V. Gurbanov、Abel M. Maharramov、Firudin I. Guseinov、Maximilian N. Kopylovich、Fedor I. Zubkov、Kamran T. Mahmudov、Armando J.L. Pombeiro
DOI:10.1016/j.molcata.2016.05.030
日期:2017.1
water-soluble copper(II) complexes [Cu(HL)(H2O)(CH3)2NCHO}] (1), [Cu(H2L)2(im)4]·CH3OH (2) and [Cu(HL)(CH3OH)]2(μ2-py) (3) were synthesized from copper(II) nitrate and sodium (Z)-2-(2-(1,3-dioxo-1-(phenylamino)butan-2-ylidene)hydrazinyl)benzene-sulfonate (NaH2L), in the absence (for 1) and presence of imidazole (im) (for 2) or pyrazine (py) (for 3), and fully characterized. The complexes 1–3 have been
三种新型水溶性铜(II)配合物[Cu(HL)(H 2 O)(CH 3)2 NCHO}](1),[Cu(H 2 L)2(im)4 ]·CH 3 OH (2)和[铜(HL)(CH 3 OH)] 2(μ 2 -py)(3)从铜(II),硝酸和钠(合成ž)-2-(2-(1,3-二氧代-1(苯基氨基)丁丹-2-亚甲基肼基)苯磺酸盐(NaH 2 L),在不存在(对于1)和存在咪唑(im)(对于2)或吡嗪(py)(对于3),并且功能齐全。配合物1-3已被用作立体选择性C H活化催化剂,用于模拟硝基乙烷与水中各种醛类的硝基羟醛(Henry)缩合反应。1是最具活性的催化剂,可提供64-87%的产率,顺/反非对映选择性高达77:23。