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2,4-戊二酮分别与不同的伯胺反应,合成出2种新的大空间位阻的β-二亚胺配体。其中β-二亚胺配体1与格氏试剂甲基碘化镁(Me Mg I)反应得到相应四配位镁的甲基配合物,配体1的锂盐与溴化镁(Mg Br2)反应制备出Mg-Li双金属溴配合物。新β-二亚胺配体和相应镁的甲基配合物和溴配合物的晶体结构均通过单晶X射线衍射确定,相应镁的甲基配合物和溴配合物在苯乙酮的硅氢化反应中显示了较好的催化活性。
2,4-pentanedione reacted with different primary amines respectively to synthesize two new sterically hindered β-diimine ligands. Among them, β-diimine ligand 1 reacted with Grignard reagent methyl magnesium iodide (Me Mg I) to obtain the corresponding tetracoordinate magnesium methyl complex. The lithium salt of ligand 1 reacted with magnesium bromide (Mg Br 2) The Mg-Li bimetallic bromine complex was prepared. The crystal structures of the novel β-diimine ligands and the corresponding methyl and bromine complexes of magnesium were determined by single crystal X-ray diffraction. The corresponding methyl and bromine complexes of magnesium were hydrolyzed in the hydrosilation of acetophenone The reaction showed good catalytic activity.