Synthesis of Dipotassium 2,2′‐Bis(2‐oxidobenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl Derivatives and Use as Ligand Transfer Reagent
作者:Tareq M. A. Al‐Shboul、Steffen Ziemann、Helmar Görls、Taghreed M. A. Jazzazi、Sven Krieck、Matthias Westerhausen
DOI:10.1002/ejic.201701472
日期:2018.4.17
and trimeric dipotassium 2,2′‐bis(2‐oxido‐3‐methoxybenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl (2b) has been isolated. The metathesis reaction of 2a with [(thf)2TiCl4] yields 2,2′‐bis(2‐oxidobenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl titanium(IV) dichloride (3) with two isomeric forms, one with a cis and another with an uncommon trans arrangement of the halide ions.
2,2'-二氨基-4,4'-二甲基-1,1'-联苯与2-羟基苯甲醛(水杨醛)或其3-,4-或5-甲氧基取代的同类物的缩合导致形成2, 2'-双(水杨亚氨基)-4,4'-二甲基-1,1'-联苯(1a)及其甲氧基取代的同类物1b – 1d。用KH对1a进行质子化生成八角形和轮状双钾2,2'-双(2-氧化苄叉亚氨基)-4,4'-二甲基-1,1'-联苯(2a)仅微溶于普通有机溶剂。附着的甲氧基能够稳定较小的聚集体和三聚二钾2,2'-双(2-氧化-3-甲氧基苄叉亚氨基)-4,4'-二甲基-1,1'-联苯(2b)已被隔离。2a与[(thf)2 TiCl 4 ]的复分解反应生成2,2'-双(2-氧化苄叉亚氨基)-4,4'-二甲基-1,1'-联苯二氯化钛(IV)(3)异构体形式,一种具有顺式,另一种具有不常见的卤离子反式排列。