Preparation of Ethynylpyridine Macrocycles by Oxidative Coupling of an Ethynylpyridine Trimer with Terminal Acetylenes
作者:Hajime Abe、Hiroyuki Kurokawa、Yusuke Chida、Masahiko Inouye
DOI:10.1021/jo101921e
日期:2011.1.7
Macrocycles consisted of pyridine rings and acetylene bonds were prepared by Eglinton coupling from a tandem precursor bearing two terminal alkynyl groups. The composition of molecular size in the cyclized products changed by the reaction solvent. In pyridine, 9-meric and bigger macrocycles were obtained, while that of 6-mer was not. On the other hand, in pyridine/THF mixed solvent, the 6-mer was obtained
由吡啶环和乙炔键组成的大环是通过Eglinton偶联从带有两个末端炔基的串联前体制备的。环化产物中分子大小的组成由反应溶剂改变。在吡啶中,获得了9-聚体和更大的大环,而没有获得6-聚体。另一方面,在吡啶/ THF混合溶剂中,获得了6聚体作为主要产物。