42059-56-3Relevant articles and documents
A Novel Chromone Schiff-Base Fluorescent Chemosensor for Cd(II) Based on C=N Isomerization
Yan, Jun,Fan, Long,Qin, Jing-can,Li, Chao-rui,Yang, Zheng-yin
, p. 1059 - 1065 (2016)
A new chromone Schiff-base fluorescent probe 7′-methoxychromone-3′-methylidene-1,2,4-triazole-3-imine (L) was designed and synthesized for selective recognition Cd2+. With the fluorescence titration and the ESI-MS data, we reach the conclusion that the binding mode of the ligand-metal (L-Cd2+) complex is 1:1. The sensor showed a strong fluorescence enhancement in ethanol system of Cd2+ (excitation 409?nm and emission 462?nm) and the sensing mechanism based on the fact that C=N isomerization can be used to explain this phenomenon.
Synthesis of chromonylthiazolidines and their cytotoxicity to human cancer cell lines
Anh, Hoang Le Tuan,Cuc, Nguyen Thi,Tai, Bui Huu,Yen, Pham Hai,Nhiem, Nguyen Xuan,Thao, Do Thi,Nam, Nguyen Hoai,Van Minh, Chau,Van Kiem, Phan,Kim, Young Ho
, p. 1151 - 1160 (2015)
Nine new chromonylthiazolidine derivatives were successfully semi-synthesized from paeonol. All of the compounds, including starting materials, the intermediate compound and products, were evaluated for their cytotoxic effects toward eight human cancer ce
A novel and resumable Schiff-base fluorescent chemosensor for Zn(II)
Yan, Jun,Fan, Long,Qin, Jing-Can,Li, Chao-Rui,Yang, Zheng-Yin
, p. 2910 - 2914 (2016)
A new resumable Schiff-base fluorescent probe 7-methoxychromone-3-carbaldehyde-(3′-hydroxy-2′-naphthaleneformyl) hydrazone (L) was designed and synthesized for selective recognition Zn2+. With the titration and the ESI-MS spectra data, we reached the conclusion that the binding ratio between L and Zn2+ was determined to be 1. The sensor showed a strong fluorescence enhancement in ethanol system of Zn2+ (excitation 430 nm and emission 498 nm). And the enhancement may be due to C=N isomerization and Photoinduced Electron Transfer (PET).
Synthesis, crystal structure, antioxidant activities and DNA-binding studies of the Ln(III) complexes with 7-methoxychromone-3-carbaldehyde-(4′-hydroxy) benzoyl hydrazone
Wang, Qian,Yang, Zheng-Yin,Qi, Gao-Fei,Qin, Dong-Dong
, p. 2425 - 2433 (2009)
A novel chromone Schiff base, 7-methoxychromone-3-carbaldehyde-(4′-hydroxy) benzoyl hydrazone (L) and its Ln(III) complexes (Ln = La, Eu) were synthesized and characterized. The crystal structure of the La(III) complex was determined by single-crystal X-r
A colorimetric and turn-on fluorescent chemosensor for Al(III) based on a chromone Schiff-base
Fan, Long,Li, Tian-Rong,Wang, Bao-Dui,Yang, Zheng-Yin,Liu, Chun-Jiao
, p. 760 - 764 (2014)
A simple Schiff-base receptor 7-methoxychromone-3-carbaldehyde- (pyridylformyl) hydrazone (MCNH) was prepared. It exhibits an off-on-type mode with high sensitivity in the presence of Al 3+. This compound could be used as Al3+ probe in ethanol and it features visible light excitation (433 nm) and emission (503 nm) profiles. Upon binding of Al3+, a significant fluorescence enhancement with a turn-on ratio over 800-fold was triggered. However, other metal ions had no such significant effect on the fluorescence. MCNH can also be used as a colorimetric chemosensor for Al3+, which is easily observed from colorless to yellow-green by the naked-eye. The detection limit of MCNH for Al3+ was as low as 1.9 × 10-7 M.
NHC-Catalyzed Cascade Reaction between β-Methyl Enals and Dienones for Quick Construction of Complex Multicyclic Lactones
Sun, Jun,Xu, Jun,Nie, Guihua,Jin, Zhichao,Chi, Yonggui Robin
supporting information, p. 2595 - 2599 (2020/03/30)
A NHC-promoted cascade reaction between β-methyl enal and dienone is developed for quick access to multicyclic lactone molecules bearing quaternary chiral carbon centers. Our study constitutes the first 1,6-addition of the acylazolium vinyl enolate γ-carbon via NHC catalysis and provides rapid access to complex lactone molecules that are otherwise difficult to prepare. The structurally sophisticated lactone products bearing up to four fused ring structures are afforded in up to quantitative yields with good to excellent enantioselectivities.
