Establishing the correlation between catalytic performance and N→Sb donor–acceptor interaction: systematic assessment of azastibocine halide derivatives as water tolerant Lewis acids
作者:Jian Lei、Lingteng Peng、Renhua Qiu、Yongping Liu、Yi Chen、Chak-Tong Au、Shuang-Feng Yin
DOI:10.1039/c9dt01100e
日期:——
A series of organoantimony(III) halide complexes with a tetrahydrodibenzo[c,f][1,5]azastibocine framework were synthesized and employed as water tolerant Lewis acid catalysts. The results of a systematic structure–activity relationship study demonstrated that the strength of N→Sb donor–acceptor interaction could be synergistically modulated by tuning the properties of the nitrogen substituents and
合成了一系列具有四氢二苯并[ c,f ] [1,5]氮杂二bocine骨架的有机锑(III)卤化物配合物,并用作耐水路易斯酸催化剂。系统的结构-活性关系研究的结果表明,N→Sb供体-受体相互作用的强度可通过调节邻近中心锑原子的氮取代基和卤素原子的性质来协同调节,从而导致明显的催化作用。表现有机反应,如曼尼希,交叉缩合,环化-芳构化和环氧化物氨解反应。氟化有机锑(Ⅲ))由于使用Sb–F部分作为氢键受体,因此发现其衍生物比氯化,溴化和碘化的类似物更具活性。相比之下,发现化合物6-环己基-12-氟-5,6,7,12-四氢二苯并[ c,f ] [1,5]氮杂stibocine(1d)具有最高的催化活性,并且在规模扩大综合。