Coordination-Induced IntramolecularDouble Cyclization: Synthesis of Boron-Bridged Dipyridylvinylenesand Dithiazolylvinylenes
Coordination-Induced IntramolecularDouble Cyclization: Synthesis of Boron-Bridged Dipyridylvinylenesand Dithiazolylvinylenes
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DOI：
10.1055/s-0028-1083271
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Qiang Zhao;Hongyu Zhang;A. Wakamiya;S. Yamaguchi
中科院分区：
文献类型：
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作者：
Qiang Zhao;Hongyu Zhang;A. Wakamiya;S. Yamaguchi
Di以吡啶基或噻唑基为杂芳基的（杂芳基）炔类化合物与溴代二苯并硼反应生成配合物，再经水处理促进分子内级联双环反应生成二苯并硼桥联的梯形二苯并硼配体。对于噻唑基衍生物，在末端位置的进一步衍生化产生双在循环伏安法中，所制备的梯形分子在低还原电位下显示出可逆的还原波，在荧光光谱中显示出强烈的荧光发射。
Di(heteroaryl)acetylenes having a pyridyl or thiazolyl as theheteroaryl group underwent a reaction with bromodibenzoborole toproduce coordination complexes, which were further treated withwater to promote the intramolecular cascade double cyclization toproduce the dibenzoborolyl-bridged ladder di(heteroaryl)vinylenes.For the thiazolyl derivative, further derivatization at the terminalpositions produced a bis(dimesitylboryl)-substituted derivative.The ladder molecules prepared showed an intense emission in thefluorescence spectra as well as reversible reduction waves at lowreduction potentials in the cyclic voltammetry.