Unprecedented Strong Lewis Bases-Synthesis and Methyl Cation Affinities of Dimethylamino-Substituted Terpyridines
作者:Paul Hommes、Christina Fischer、Christoph Lindner、Hendrik Zipse、Hans-Ulrich Reissig
DOI:10.1002/anie.201403403
日期:2014.7.14
trifluoromethanesulfonate induces a twofold intramolecular condensation providing an efficient access to 4,4′′‐di‐ and 4,4′,4′′‐trifunctionalized 6,6′′‐dimethyl‐2,2′:6′,2′′‐terpyridines. Using this method, hitherto unknown 4,4′′‐bis(dimethylamino)‐ and 4,4′,4′′‐tris(dimethylamino)terpyridines have been prepared that show remarkably high calculated Lewis basicities.
提出了一种通过末端吡啶环的组装来合成功能化的2,2':6',2''-吡啶的通用方法。环化前体双-β-酮酰胺由4-取代的2,6-吡啶二羧酸和乙酰丙酮或其相应的烯氨基酮制得。用三甲基甲硅烷基三氟甲磺酸盐处理可引起两倍的分子内缩合,从而有效地获得4,4'-二-和4,4',4'-三官能化的6,6'-二甲基-2,2':6',2 ′′-三吡啶 使用这种方法,制备了迄今未知的4,4''-双(二甲基氨基)-和4,4',4''-三(二甲基氨基)三联吡啶,它们显示出很高的计算出的Lewis碱度。