The anilide–bis(aryloxide) proligands H3[ONOR] (where H3[ONOR] = 2,6-(3-R1-5-R2-2-hydroxybenzyl)-4-tert-butyl-N-tolyl-aniline; H3[ONOtBu], R1 = tBu, R2 = Me; H3[ONOMe], R1 = Me, R2 = tBu; H3[ONOMe2], R1 = R2 = Me) were synthesized from 2-bromo-5-tert-butyl-isophthalic acid dimethyl ester in three steps in multigram scale. The ligand precursor H3[ONOtBu] was readily doubly and triply deprotonated with
N-酰
苯胺双(芳氧基)前
配体ħ 3 [ ONO - [R ](其中H 3 [ ONO - [R ] = 2,6-(3-R 1 -5-R 2 -2羟基苄基)-4-叔丁基- Ñ -
甲苯基
苯胺; H 3 [ ONO t Bu ],R 1 = t Bu,R 2 = Me; H 3 [ ONO Me ],R 1 = Me,R 2 = t Bu; H 3 [ ONO Me2 ],R 1 = R 2由2-
溴-5-叔丁基
间苯二甲酸二甲酯以三克数级合成。
配体前体H 3 [ ONO t Bu ]容易被碱
金属试剂双重和三次去质子化,生成相关的衍
生物M 2 [H(ONO t Bu)]和M 3 [ ONO t Bu ](M = Li,Na, K)。观察到
配体去质子化的程度取决于去质子化试剂和溶剂的选择。三
锂衍
生物Li 3 [ ONO t Bu ]与MCl 3的
金属转移反应(THF)3(M = Cr,V; THF =
四氢呋喃)得到[(ONO