First Vilsmeier-Haack Synthesis of Flavones using<i>bis</i>-(Trichloromethyl) Carbonate/Dimethylformamide
作者:W. K. Su、X. Y. Zhu、Z. H. Li
DOI:10.1080/00304940802710947
日期:2009.3.20
cyclodehydration of 1-(2-hydroxyphenyl)-3-aryl-1,3-propanediones. Many of these procedures use strong acids such as H2SO4, 5-6 HCl, 7 HBr or HI, 8 catalysts such as NaHSO4/SiO2, 9 H3PMo12O40·nH2O/SiO2, 10 H3PW12O40·nH2O/SiO2, 10 non-aqueous cation-exchange resin, 11 or supported trifluoromethanesulfonicacid. 12 All of these agents require high temperatures to complete the reaction. Other methods include
A facile synthesis of flavones catalysed by gallium(III) triflate
作者:Can Jin、Fei He、Huayue Wu、Jiuxi Chen、Weike Su
DOI:10.3184/030823409x396409
日期:2009.1
Ga(OTf)3 was explored as a novel catalyst for the cyclisation of 1-(2-hydroxyphenyl)-3-aryl-1,3-propanediones in nitromethane to flavones with excellent yields.
considerably explored. In recent years, substitutedsynthetic flavonoids have been dragging continuous attention due to their broad range of biological activities. Flavonoids are very well know and documented to possess antioxidant effects, antiviral and leishmanicidal activity, Certain 4-Iminoflavones Derivatives: Synthesis, Docking Studies, Antiasthmatic and Antimicrobial Agents
intensely stained β-amyloid plaques. In biodistrubution experiments using normal mice, they displayed high uptake in the brain ranging from 2.9 to 4.2%ID/g at 2 min postinjection. The radioactivity washed out from the brain rapidly (1.3–2.0%ID/g at 30 min), which is highly desirable for β-amyloid imaging agents. FPEG flavones may be potential PET imaging agents for β-amyloid plaques in Alzheimer’s brains.
Composition for diagnosing amyloid-related diseases
申请人:Nagasaki University
公开号:US08192717B2
公开(公告)日:2012-06-05
A composition for diagnosing amyloid-related diseases, which comprises a flavone derivative, a chalcone derivative, a styrylchromone derivative, or a coumarin derivative, is provided. These compounds have high binding specificity to an amyloid β protein, high permeability to a blood-brain barrier, and ability to rapidly disappear from sites other than cerebral senile plaque. Accordingly, the composition of the present invention using these compounds enables the diagnosis of amyloid-related diseases with high precision.