作者:Valerie J. Hesler、Brian W. Skelton、Allan H. White、David H. Brown、Murray V. Baker
DOI:10.1007/s10847-015-0491-1
日期:2015.6
The synthesis, structure, and conformational behaviour of three imidazolium cyclophanes that incorporate one or two 4-tert-butylphenol or 4-tert-butylanisole groups as meta-disubstituted linkers in the macrocycle is described. The cyclophanes containing anisole moieties adopt a cone conformation in the solid state, which, in solution, is not labile on the NMR timescale. The cyclophanes containing one or two phenol moieties adopt conformations other than the cone in the solid state and are labile in solution on the NMR timescale. The phenol cyclophanes are readily deprotonated, and structural and conformational studies for a variety of the associated cyclophanes are also reported.
描述了三种咪唑鎓环芳烃的合成、结构和构象行为,这些环芳烃在其巨型环中包含一个或两个作为间位双取代连接体的4-叔丁基苯酚或4-叔丁基苯醚基团。含有苯醚部分的环芳烃在固态时采用锥形构象,而在溶液中在NMR时间尺度上是稳定的。含有一个或两个苯酚部分的环芳烃在固态时采取除锥形以外的构象,并且在溶液中的NMR时间尺度上是可变的。苯酚环芳烃容易去质子,并且还报道了多种相关环芳烃的结构和构象研究。