Conformational Mobility of Substituted 2-Methoxychalcones under the Action of Lanthanide Shift Reagents
作者:A. V. Turov、S. P. Bondarenko、A. A. Tkachuk、V. P. Khilya
DOI:10.1007/s11178-005-0118-x
日期:2005.1
Various lanthanide shift reagents Ln(fod)3 were found to affect the conformational composition of 2-methoxychalcones. Coordination of Yb(fod)3 occurs mainly at the carbonyl oxygen atom of the substrate, while Eu(fod)3 and shift reagents derived from other lanthanides coordinate substituted chalcones as bidentate ligands, giving rise to a secondary tetrachelate with the corresponding change of conformation of the substrate molecule. The possibility for chelation is determined by steric hindrances in the vicinity of the substrate coordination centers and concurrent coordination of other electron-donor groups present in the substrate molecule.
Inhibitory Effects of 2'-Hydroxychalcones on Rat Lens Aldose Reductase and Rat Platelet Aggregation.
作者:Soon Sung LIM、Sang Hoon JUNG、Jun JI、Kuk Hyun SHIN、Sam Rok KEUM
DOI:10.1248/cpb.48.1786
日期:——
Inhibitory effects of synthetic 2'-hydroxychalcone derivatives on rat lens aldose reductase (RLAR) and on platelet aggregation were investigated for the prevention or the treatment of chronic diabetic complications. 5'-chloro-4, 2'-dihydroxychalcone (8) and 5'-chloro-3, 2'-dihydroxychalcone (27) exhbited a potent inhibitory effect on rat platelet aggregation induced by ADP (IC50=0.10 and 0.06 mg/ml, respectively) and collagen (IC50=44 and 16 μg/ml, respectively) but showed relatively weak inhibitory activities on RLAR.
A FACILE SYNTHESIS OF ETHYL-2-METHYL-5-ARYL-5H-CHROMENO-[3,4-c]PYRIDINE-1-CARBOXYLATES
作者:M. Venkati、G. L. David Krupadanam
DOI:10.1081/scc-100105383
日期:2001.1.1
Flav-4-ones on reaction with DMF/POCl3 gave 4-chloro-2-aryl-2H-chromene-3-carbaldehydes which on reaction with ethyl-3-aminocrotonate give under Hantszch reaction conditions ethyl-2-methyl-5-aryl-5H-chromeno[3,4-c]pyridine-1-carboxylates in good yields.
Chakravarti; Dutta, Journal of the Indian Chemical Society, 1939, vol. 16, p. 639,644
作者:Chakravarti、Dutta
DOI:——
日期:——
Ghotekarab; Joshia; Mandhane, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2010, vol. 49, # 9, p. 1267 - 1270