Unprecedented Negishi Coupling at C−Br in the Presence of a Stannyl Group as a Convenient Approach to Pyridinylstannanes and Their Application in Liquid Crystal Synthesis
作者:Yulia A. Getmanenko、Robert J. Twieg
DOI:10.1021/jo701812t
日期:2008.2.1
6)-tri-n-butylstannylpyridines, prepared from dibromopyridines and i-PrMgCl at room temperature, undergo Negishi coupling with either alkyl or arylzinc chlorides. The new alkyl- and aryl-substituted pyridylstannanes produced are shown to be suitable for further functionalization by Stille coupling. A group of new liquid crystalline materials with aromatic cores comprised of pyridine and thiophene rings were prepared
在室温下由二溴吡啶和i- PrMgCl制备的2-溴5(或6)-三正丁基苯乙烯基吡啶,与烷基或芳基氯化锌进行Negishi偶联。所产生的新的烷基和芳基取代的吡啶基锡烷酸酯经显示适合通过Stille偶联进一步官能化。利用这些新的吡啶基锡烷作为主要中间体,制备了一组具有由吡啶和噻吩环组成的芳族核的新型液晶材料。