Synthesis and photoluminescence properties of star-shaped 2,3,6,7-tetrasubstituted benzo[1,2-b:4,5-b′]difurans
作者:Mariusz J. Bosiak、Piotr Trzaska、Dariusz Kędziera、Jörg Adams
DOI:10.1016/j.dyepig.2016.01.025
日期:2016.6
Elongated benzodifuran derivatives were obtained by the reaction of tetrabromobenzodifuran with aryl-, heteroaryl- or vinylboronic acid MIDA esters in the presence of Pd(dppf)Cl2 catalyst, and tripotassium phosphate as a base in 1,4-dioxane/water mixture. The star-shaped products, obtained in 37–99% yield, exhibit the UV–Vis fluorescence with high quantum yields, 69–100%. Due to the long-chained alkyl groups
描述了α-卤代酮与对苯二酚的新反应,导致高度荧光的星形2,3,6,7-四取代苯并二呋喃。因此,由1,2-得到苯并二呋喃星的核心2,3,6,7-四(4-溴苯基)-4,8-二癸基苯并[1,2- b:4,5- b ']二呋喃。在没有溶剂的氯化锌存在下,双(4-溴苯基)-2-氯乙酮和2,5-二氢对苯二酚。在Pd(dppf)Cl 2存在下,四溴苯并二呋喃与芳基,杂芳基或乙烯基硼酸MIDA酯反应可制得伸长的苯并二呋喃衍生物。催化剂和磷酸三钾盐作为1,4-二恶烷/水混合物的碱。以37–99%的产率获得的星形产品显示出具有高量子产率(69–100%)的UV-Vis荧光。由于位置4和8处的长链烷基,这些高度π共轭的产物可溶于许多有机溶剂。