Large Scale Synthesis of 4’-(4-Bromophenyl)-2,2’:6’,2”-terpyridine and Nature of the Mysterious Green By-product
作者:Ulrich Siemeling、Jens Vor der Brüggen、Udo Vorfeld、Anja Stammler、Hans-Georg Stammler
DOI:10.1515/znb-2003-0514
日期:2003.5.1
4’-(4-Bromophenyl)-2,2’:6’,2”-terpyridine (5) was prepared on a large scale (up to 100 g batches) from 2-[3-(4-bromophenyl)-1-oxoprop-2-enyl]pyridine (3a) and N-[2-oxo-2-(2-pyridyl)- ethyl]pyridinium iodide (4). In the presence of substoichiometric amounts of 4, 1-[3-(4- bromophenyl)indolizin-1-yl-1-imino]-3-[4-bromophenyl]-1H-indolizinium iodide (6aI) was formed as an intensely coloured by-product
4'-(4-溴苯基)-2,2':6',2”-三联吡啶 (5) 由 2-[3-(4-溴苯基)-1 大规模制备(最多 100 g 批次) -氧代丙-2-烯基]吡啶(3a)和N-[2-氧代-2-(2-吡啶基)-乙基]吡啶鎓碘化物(4)。在亚化学计量的 4 存在下,1-[3-(4-溴苯基)indolizin-1-yl-1-imino]-3-[4-bromophenyl]-1H-indolizinium iodide (6aI) 形成为强烈的有色副产品。描述了几种相关的新型 indolizinium 衍生物的合成,包括 1-[3-(4-methylphenyl)indolizin-1-yl-1-imino]-3-[4-methylphenyl]-1Hindolizinium hexafluorophosphate (6cPF6),其晶体结构已经确定。