The synthesis of blue emitting 3-Amino-1-hetarylfluorenes and their unprecedented alkylated derivatives

Four-component one-pot synthesis of novel dicyanoaniline anchored triazoles

A four-component reaction was developed by taking the advantage of the reactivity of the propargyl functional groups, residing on the primarily formed dicyanoaniline products. Various enolizable cyclic ketones were reacted with malononitrile and 4-(prop-2-yn-1-yloxy)benzaldehyde derivatives in an aqueous <i>t</i>-BuOH/NaOH medium, and the resulting dicyanoanilines were subjected to a subsequent in situ click reaction to afford the final dicyanoaniline-anchored-triazole products. The enhanced photophysical properties of the novel products are under current study.

Fluorene/fluorenone carboxamide derivatives as selective light-up fluorophores for c-myc G-quadruplex

The development of fluorescent dyes capable of selective recognition of G-quadruplexes is essential for studying its localization and biological functions. However, considering the G-quadruplex topologies may vary significantly, the synthesis of compounds showing both selectivity and strong fluorescence properties still remains a great challenge. Recently we have developed fluorene/fluorenone derivatives with structure-specific binding towards dsRNA, indicating its potential for structure-selective ligands. Herein, we report the synthesis of novel fluorene/fluorenone derivatives and their selectivity towards various DNA structures, particularly G-quadruplexes, two of which showed strong affinity to the proto-oncogene c-myc promoter G-quadruplex.