Synthesis and Photophysical Property Studies of the 2,6,8-Triaryl-4-(phenylethynyl)quinazolines
作者:Malose Mphahlele、Hugues Paumo、Ahmed El-Nahas、Morad El-Hendawy
DOI:10.3390/molecules19010795
日期:——
The 2-aryl-6,8-dibromo-4-chloroquinazolines derived from the 2-aryl-6,8-dibromoquinazolin-4(3H)-ones were subjected to the Sonogashira cross-coupling with terminal acetylenes at room temperature to afford novel 2-aryl-6,8-dibromo-4-(alkynyl)quinazoline derivatives. Further transformation of the 2-aryl-6,8-dibromo-4-(phenylethynyl)quinazolines via Suzuki-Miyaura cross-coupling with arylboronic acids occurred without selectivity to afford the corresponding 2,6,8-triaryl-4-(phenylethynyl)quinazolines. The absorption and emission properties of these polysubstituted quinazolines were also determined.
从2-芳基-6,8-二溴-4-氯喹啉-4(3H)-酮衍生出的2-芳基-6,8-二溴-4-(炔基)喹啉类化合物在室温下与末端炔烴进行了索诺加希拉交叉耦合,生成了新型的2-芳基-6,8-二溴-4-(炔基)喹啉衍生物。随后,2-芳基-6,8-二溴-4-(苯乙炔)喹啉通过与芳基硼酸的铃木-宫浦交叉耦合进行了进一步转化,未显示选择性,生成相应的2,6,8-三芳基-4-(苯乙炔)喹啉。这些多取代喹啉的吸收和发射特性也被确定。