Synthesis of rapamycin glycoconjugates via a CuAAC-based approach
摘要:
The conversion of the C40 secondary hydroxyl group of rapamycin into the azido group was followed by copper catalyzed cycloaddition of the resulting azido-rapamcin with various unprotected propargyl O-and S-glycosides and a C-ethynyl derivative. This approach furnished a collection of triazole-bridged rapamycin glycoconjugates (14 examples) in 44-83% isolated yield. (C) 2013 Elsevier Ltd. All rights reserved.
Sugar-bearing tetraphenylethylene: novel fluorescent probe for studies of carbohydrate–protein interaction based on aggregation-induced emission
作者:Jin-Xiang Wang、Qi Chen、Ning Bian、Fen Yang、Jing Sun、Ai-Di Qi、Chao-Guo Yan、Bao-Hang Han
DOI:10.1039/c0ob00680g
日期:——
tetraphenylethenes (TPE) are designed and prepared as “turn-on” luminescent sensors for lectins and glycosidases based on aggregation-induced emission. Through aggregation derived from carbohydrate–lectin binding, multivalent mannosyl-bearing TPE shows a good selectivity and sensitivity to Con A by switching on the fluorescence of water-soluble tetraphenylethylene-based glyco-conjugates in aqueous solution. Meanwhile