Results 71 to 80 of about 187,468 (290)
Synthesis of Cinchona Alkaloids
Journal of Synthetic Organic Chemistry, Japan, 2007 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Yuichi Kobayasi, Tsuyoshi Itoyama
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A call for using natural compounds in the development of new antimalarial treatments – an introduction [PDF]
, 2011 Natural compounds, mostly from plants, have been the mainstay of traditional medicine for thousands of years. They have also been the source of lead compounds for modern medicine, but the extent of mining of natural compounds for such leads decreased ...
Hagai Ginsburg, Eric Deharo
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ChemistryEurope, Volume 4, Issue 3, March 2026.Chiral gem‐dicyano‐spirocyclopropyl oxindoles are obtained by a chiral N‐9‐Anth‐PyBidine‐Co(OAc)2‐catalyzed asymmetric Michael/alkylation reaction of 3‐chlorooxindoles with alkylidenemalononitriles. The three‐component coupling reaction of 3‐chlorooxindoles, aldehydes, and malononitrile shows the advantage of not requiring the preparation of ...
Takaaki Saito +4 more
wiley +1 more source
Peripheral Metal Complexes: Chlorophyll “Isomers” with Magnesium Bound to the Ring E ß-Keto Ester System [PDF]
, 1978 Peripheral magnesium complexes of methyl pheophorbides a and b, bacteriomethyl pheophorbide a, bacteriopheophytin a, and protopheophytin a have been prepared and characterized by UV-vis, IR, ‘H NMR, and luminescence spectroscopy.
Katz, J. J., Scheer, Hugo
core
Bitter Taste Perception in BaYaka Hunter‐Gatherers
American Journal of Human Biology, Volume 38, Issue 2, February 2026.ABSTRACT Objectives This study examined variation in bitter taste perception among BaYaka hunter‐gatherers from the Republic of Congo, comparing individuals from the same population that were born and grew up in a forest ecology to those from a logging town.
Sarai Keestra +5 more
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Plant-Environment Interactions, Volume 7, Issue 1, February 2026.ABSTRACT This study investigates the foliar secondary metabolite profiles of four Mitragyna species naturally occurring in Thailand: M. diversifolia, M. hirsuta, M. rotundifolia, and M. speciosa (kratom). Using untargeted gas chromatography–mass spectrometry (GC–MS), 409 secondary volatile metabolites were annotated across the four species.
Tushar Andriyas +5 more
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Molecules, 2021 By varying the steric and electronic surroundings of the hydrogen-bonding motif, the novel chiral Cinchona-alkaloid based selenoureas were developed.
Mariola Zielińska-Błajet +2 more
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Journal of Chemistry, Volume 2026, Issue 1, 2026.Isophorone is an important motif in synthetic organic chemistry, as it is highly reactive and can get involved in a diverse array of functional group transformations to access various synthetic intermediates and molecular targets. In this context, an important group of compounds is the conjugated or nonconjugated isophorone‐cored dienones, which are ...
M. Saeed Abaee +2 more
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Cupreines and cupreidines: an established class of bifunctional cinchona organocatalysts
Beilstein Journal of Organic Chemistry, 2016 Cinchona alkaloids with a free 6'-OH functionality are being increasingly used within asymmetric organocatalysis. This fascinating class of bifunctional catalyst offers a genuine alternative to the more commonly used thiourea systems and because of the ...
Laura A. Bryant +2 more
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Effects of Quinine, Quinidine and Chloroquine on Human Muscle Nicotinic Acetylcholine Receptors
Frontiers in Pharmacology, 2018 The genus Cinchona is known for a range of alkaloids, such as quinine, quinidine, cinchonine, and cinchonidine. Cinchona bark has been used as an antimalarial agent for more than 400 years.
Günter Gisselmann +3 more
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