Synthesis of polycyclic oxa-coumarins, potential antitumour agents and a short and convenient synthesis of naphthopyranoquinolines from naphthopyran chloroaldehydes.
Copper-Catalyzed Aza-Diels–Alder Reaction and Halogenation: An Approach To Synthesize 7-Halogenated Chromenoquinolines
作者:Xiaoqiang Yu、Jiao Wang、Zhanwei Xu、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acs.orglett.6b01065
日期:2016.5.20
A new halogenation method to construct halogen-substituted quinoline moieties is described. The Cu-catalyzed intramolecular aza-Diels–Alder reaction and halogenation reaction proceeded smoothly under mild conditions to produce the corresponding 7-chloro-6H-chromeno[4,3-b]quinolines and 7-chloro-6H-thiochromeno[4,3-b]quinolines in satisfactory yields.
描述了构建卤素取代的喹啉部分的新的卤化方法。铜催化的分子内氮杂-Diels-Alder反应和卤化反应在温和条件下平稳进行,生成了相应的7-氯-6 H-氧化铬[4,3- b ]喹啉和7-氯-6 H-硫代氧化铬[4] ,3- b ]喹啉具有令人满意的产率。
A chromenoquinoline-based fluorescent off–on thiol probe for bioimaging
A new chromenoquinoline-based fluorescent offâonthiol probe 2 is reported. In aqueous buffer solutions at physiological pH, the probe exhibited 223-fold enhancement in fluorescence intensity by a Michael addition of cysteine to the maleimide appended to a chromenoquinoline. Cell permeability and live cell imaging of thiols are also demonstrated.