cinchona alkaloid
Asymmetric catalysis with bifunctional cinchona alkaloid based urea and thiourea organocatalysts
... thiourea-substituted cinchona alkaloid catalysts (general structure in ...step. Cinchona alkaloids are inexpensive starting ma- terials readily available in both pseudoenantiomeric ...
12
Novel Cinchona Alkaloid Derivatives as Potential Antimalarial Agents through Receptor–Inhibitor Interaction Fingerprint and Biosynthesis Design
... novel cinchona alkaloid derivatives (CADs) as potential antimalarial agents through molecular docking, pharmacopore modeling and biosynthesis ...and cinchona alkaloid derivative structures ...
8
The design of biofunctional cinchona alkaloid derived catalysts : a new departure
... The catalysts above make clear that a strategy of adding additional steric bulk or stereochemical information to a catalyst can be advantageous, it (unsurprisingly) has also been shown to be advantageous to effect such ...
300
1 Carboxylatomethyl 2 (hydroxyquinolin 4 ylmethyl) 5 vinyl 1 azoniabicyclo[2 2 2]octane, a zwitterion of the Cinchona alkaloid complex
... 2003). Cinchona alkaloid-derived quaternary ammonium salts are exploited in the chiral phase-transfer catalyst (PTC) process (O’Donnell, 2000, 2001; Lygo, 2001; Shen et ...of Cinchona alkaloids and ...
9
Development of Enantioselective Processes Catalysed by Novel Asymmetric Bifunctional Phase Transfer Organocatalysts
... 1.4.6.2 Further catalyst development: moving away from cinchona alkaloids In 2002 the only non-cinchona alkaloid derived family of catalysts available for the phasetransfer catalysed ben[r] ...
285
Bioactive indanes: Proof of concept study for enantioselective synthetic routes to ph46a, a new potential anti inflammatory agent
... using cinchona alkaloid-derived PTCs has received significant attention from an industrial perspective (largely in the synthesis of amino acids), as the conditions required are typically mild, without the ...
18
A Highly Diastereoselective and Enantioselective Phase-Transfer Catalyzed Epoxidation of β-Trifluoromethyl-β,β-disubstituted Enones with H2O2
... ammonium salt (1g or 5) derived from cinchona-alkaloid as the catalyst. Using 3 mol% of the catalyst, both enantiomers of (R,R) and (S,S) β-trifluoromethyl-α,β-epoxy ketones (7, 8) were obtained in ...
26
The relationship of physico chemical properties and structure to the differential antiplasmodial activity of the cinchona alkaloids
... Each mono-protonated cinchona alkaloid structure was built in HyperChem Release 7 for Windows (Hypercube Inc. Gainesville, Florida) using a molecular mechanics procedure under MM+ [34] with bond-length ...
14
In Silico Screening and Designing Synthesis of Cinchona Alkaloids Derivatives as Potential Anticancer
... elucidated using molecular docking. Ligand binding free energies of the hP-gp binders were calculated using the free energy method and revealed that hP-gp could ac- commodate structurally diverse ligands having different ...
7
Strategies for chemical synthesis of pyrazolone derivatives and their bio significance
... reported enantioselective synthesis of p-benzoquinone substituted pyrazolones 22 using cinchona alkaloid, quinine, catalyzed Michael addition/oxidation reaction with yield up to72% 99% e[r] ...
13
Synergistic organocatalysis in the kinetic resolution of secondary thiols with concomitant desymmetrisation of an anhydride
... An organocatalytic process mediated by a single small-molecule catalyst involving the highly enantioselective desymmetrisation of an achiral electrophile while it simultaneously kinetically resolves a racemic nucleophile ...
11
Quinidine Catalysed Enantioselective Synthesis of 6 and 4 Trifluoromethyl Substituted Dihydropyrans
... of cinchona alkaloid derivatives as catalysts for the formal [4+2] cycloaddition of allenoates and ...of cinchona alkaloids was screened for catalytic activity and product enantioselectivity (Table ...
7
Evaluation of analgesic activity and toxicity of alkaloids in <em>Myristica fragrans</em> seeds in mice
... Methods: Alkaloids were extracted from ground nutmeg seed kernels with 10% acetic acid in 95% ethyl alcohol. Visceral pain was induced in male and female BALB/c mice by intraperitoneal injection of 0.6% acetic acid. ...
5
CHARACTERIZATION OF ANTIOXIDANT AND CYTOTOXIC POTENTIAL OF METHANOLIC EXTRACTS OF DIFFERENT PARTS OF AEGLE MARMELOS (L )
... power and CUPRAC assays, methanol extract of half-ripe fruit and leaf were found to exhibit moderate but concentration dependent reducing power respectively. In total alkaloid content determination methanol ...
9
Simple LC Isocratic Methods Development, Validation, and Application in the Analysis of Poor Quality Antimalarial Medicines
... related cinchona alkaloids such as cinchonine, cin- chonidine, quinidine, and dihydroquinine, together with resorcinol most found in quinine resorcin formulations, ...
23
Research into the structure of the alkaloid aspidospermine
... All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted.. In the unlikely event that the author did not send a c[r] ...
174
BERBERIS RIGIDIFOLIA KUNTH. (BERBERIDACEAE) COLOMBIAN ENDEMIC PLANT.
... Berberis rigidifolia berries can be eaten raw, employed to make cakes, or prepare fruit preserves. In addition to its culinary use it is a medicinal plant [7]. In the region of La Calera (Cundinamarca, Colombia) this ...
5
ALKALOIDAL DRUGS - A REVIEW
... An alkaloid is a type of plant-derived organic ...An alkaloid may also contain molecules of oxygen, carbon, and ...ergot alkaloid, can be toxic and even ...The alkaloid atropine belongs in ...
13
Species Richness and Endemism of Zingiberaceae in Cinchona Forest Reserve, Lantapan, Bukidnon, Philippines
... This study was carried out to provide information on species richness and endemism of Zingiberaceae in Cinchona Forest Reserve, Kaatuan, Lanta- pan, Bukidnon, Philippines. Transect walks, opportunistic sampling ...
6
Bis(quininium) (R,R) tartrate monohydrate
... by Cinchona alkaloids and optically active tartaric ...of Cinchona alkaloids (Gjerlùv & Larsen, 1997) and not in the hydrogen tartrate of quinine (Ryttersgaard & Larsen, 1998), but whereas the ...
9