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Asymmetric total syntheses of (-)-antofine and (-)-cryptopleurine using (R)-(E)-4-(tributylstannyl)but-3-en-2-ol.
The asymmetric total syntheses of the representative phenanthroindolizidine and phenan throats alkaloids, (-)-antofine and (-)-cryptopleurine, are described and the problem of constructing the pyrrolidine and piperidine rings was successfully addressed.
NMR Studies of Amine Species in MEA-CO2-H2O System : Modification of the Model of Vapor-Liquid Equilibrium (VLE)
Speciation studies in aqueous monoethanolamine (MEA) solution at different CO2 loadings have been conducted via nuclear magnetic resonance (NMR) spectroscopy. The results showed that the diagnostic
Platelet-activating factor (PAF) receptor binding antagonists from Alpinia officinarum.
Nonracemic bicyclic lactam lactones via regio- and cis-diastereocontrolled C-H insertion. Asymmetric synthesis of (8S,8aS)-octahydroindolizidin-8-ol and (1S,8aS)-octahydroindolizidin-1-ol.
The Rh(2)(MPPIM)(4)-catalyzed intramolecular C-H insertion reaction of (S)- and (R)-1-benzyl-5-(alpha-diazoacetoxy)piperidin-2-one and (S)-1-benzyl-4-(alpha-diazoacetoxy)pyrrolidin-2-one proceeds
Asymmetric synthesis of (+)-isofebrifugine and (-)-sedacryptine from a common chiral nonracemic building block.
The stereoselective syntheses of 2-substituted and 2,6-disubstituted 3-hydroxypiperidine alkaloids, (+)-isofebrifugine and (-)-sedacryptine, from a common, functionalized nonracemic bicyclic building
Evaluation of Inhibitory Potentials of Chinese Medicinal Plants on Platelet-Activating Factor (PAF) Receptor Binding
Methanol extracts of eighty Chinese medicinal plants were investigated for platelet-activating factor (PAF) receptor binding inhibitory activity using rabbit platelet to find extracts of Kalimeris indica and Euonymus japonica to exhibit significant inhibitory effects.
Triterpenoids from Adina rubella
Six new triterpenoids, 3β,23,24-trihydroxyolean-12-en-28-oic acid (1), 3β,6β,24-trihydroxyolean-12-en-28-oic acid (2), 3β,6β,19α,24-tetrahydroxyurs-12-en-28-oic acid (3), cincholic acid
Studies toward the synthesis of angularly-oxygenated angucyclines antibiotics
The [bis(trifluoroacetoxy)]iodobenzene-mediated oxidative dearomatization of 2-alkoxyarenols, followed in situ by trapping of the resulting arenoxenium ions by soft external carbon-based