作者:Reza-Ali Fallahpour
DOI:10.1055/s-2000-6331
日期:——
The key compound ethyl 2,6-dibromopyridine-4-carboxylate was prepared in two steps starting from the commercially available citrazinic acid. By using the Stille coupling reaction ethyl 2,3-dibromopyridine-4-carboxylate was converted to 2,2′-bipyridines, 2,2′ : 6′,2′′-terpyridines and 2,2′ : 6′,2′′ : 6′′,2′′′ : 6′′′,2′′′′-quinquepyridines which bear a carboxylate functional group directly attached to the central pyridine ring.
关键化合物乙基2,6-二溴吡啶-4-羧酸酯是从商业可得的柠檬酸开始,经过两步合成的。通过Stille偶联反应,将乙基2,3-二溴吡啶-4-羧酸酯转化为2,2′-吡啶,2,2′ : 6′,2′′-三吡啶和2,2′ : 6′,2′′ : 6′′,2′′′ : 6′′′,2′′′′-五吡啶,这些化合物的羧酸酯功能团直接连接到中央的吡啶环上。