Synthesis of arylenealkyne conjugated macrocycles containing a long alkylene bridge

• 来源期刊: 中国高等学校学术文摘·化学
• 关键词: macrocycles arylenealkyne template biaxial nematic phase liquid crystal
• 年，卷（期）: 2008,（1）
• 页码范围: 88-93
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11458-008-0018-z

摘要

The synthesis of the first two arylenealkyne conjugated macrocycles containing a long alkylene bridge via Glaser coupling of template-directed tetra-acetylenes was reported. Tetraacetylene intermediates with complex structures were constructed rapidly via quadruple Hagihara coupling of monoprotected bisace-tylenes to appropriate tetraiodides and subsequent desilylation. The characterization of such compounds was carried out by NMR, GPC and UV-Vis spectra. Unfortunately, the two compounds were not liquid crystals and had no biaxial nematic mesophase character as expected,