General Method for the Preparation of Alkyne-Functionalized Oligopyridine Building Blocks
作者:Raymond Ziessel、Jean Suffert、Marie-Thérèse Youinou
DOI:10.1021/jo960538g
日期:1996.1.1
diynes provides access to ditopic bipyridine or terpyridine ligands oligoPy(C&tbd1;C)(4)oligoPy comprising a tetrayne spacer. Quantitative formation of air-stable copper(I) complexes is described for the 6,6'-substituted ligands. A single crystal X-ray structure of complex 22a shows that the two ligands are interlocked around the copper(I) center in a pseudotetrahedral arrangement, similar to the structure
通过用含水甲醇碱处理从其形成末端二炔低聚(C&tbd1; C)(2)H。oligoPy(C&tbd1; C)(2)H与BrC&tbd1; CSiEt(3)的反应产生了甲硅烷基化的三炔oligoPy(C&tbd1; C)(3)SiEt(3)。进一步的同源性受到炔丙基链C-2碳上正丙胺的亲核攻击的限制,产生顺式/顺式(48%),顺式/反式(33%)和反式/反式(19 %)烯胺二炔化合物21a-c。末端二炔的Glaser氧化自偶联提供了对包含四炔间隔基的二位联吡啶或三联吡啶配体oligoPy(C&tbd1; C)(4)oligoPy的访问。描述了6,6'-取代的配体的空气稳定铜(I)配合物的定量形成。配合物22a的单晶X射线结构表明,两个配体以伪四面体排列互锁在铜(I)中心周围,类似于从NMR和FAB(+)数据推导的结构。本文报道的合成方法代表了大规模制备炔基官能化的低聚吡啶的有价值的方法。