Results 171 to 180 of about 287,843 (358)

THE CHEMISTRY OF NITROGEN AS DISCLOSED IN THE CONSTITUTION OF THE ALKALOIDS.^* [PDF]

, 1887
A. B. Prescott
openalex   +1 more source

Enantioselective Desymmetrization by Chiral Bifunctional H‐Bonding Organocatalysts

Chemistry – A European Journal, EarlyView.
Enantioselective desymmetrization has emerged as a highly efficient and conceptually elegant strategy for the construction of chiral molecules from readily available prochiral substrates. This review focuses on recent developments in organocatalytic desymmetrization reactions, with particular emphasis on approaches involving bifunctional activation ...
Michal Urban, Jan Veselý
wiley   +1 more source

Correction: A comparative study of alkaloid and phenolic compounds in different organs and tissues of Berberis integerrima. [PDF]

PLoS One
PLOS One Staff.
europepmc   +1 more source

Observations on the action of the hydrogenated alkaloids of the ergotoxine group on the circulation in man

, 1951
H. Barcroft, H. Konzett, HAROLD J. C. SWAN   +2 more
openalex   +1 more source

EVIDENCE OF DOWNWARD TRANSPORT OF ‘SOLANACEOUS’ ALKALOIDS* [PDF]

, 1959
P. M. WARREN WILSON
openalex   +1 more source

Catalytic and Photoluminescence Properties of the First‐ and Second‐Sphere Coordination of Lanthanide Complexes

Chemistry – A European Journal, EarlyView.
The Michael donor and the Michael acceptor are activated via hydrogen bonding interactions within the second‐sphere coordination of europium complexes. Abstract The efficient binding of receptors Lk (Lk = L5‐L8) to [Eu(hfac)3] (H‐hfac = 1,1,1,5,5,5‐hexafluoropentane‐2,4‐dione) allows (i) to gather the basic unit‐containing tridentate ligands Lk and the
Giau Le‐Hoang, Laure Guénée, Clémence Delage de Luget, Julien Chong, Claude Piguet   +4 more
wiley   +1 more source

The application of desymmetric enantioselective reduction of cyclic 1,3-dicarbonyl compounds in the total synthesis of terpenoid and alkaloid natural products. [PDF]

Beilstein J Org Chem
Tan DX, Han FS.
europepmc   +1 more source

Experimental investigation of surface activity, micellization behaviour, and enhanced oil recovery performance of saponin‐based green surfactants

The Canadian Journal of Chemical Engineering, EarlyView.
This graphical abstract illustrates the steps carried out in the laboratory study, including saponin modification and characterization, surface tension, interfacial tension, contact angle, adsorption, and surfactant injection tests. Abstract In this study, three forms of saponin surfactants extracted from the Camellia sinensis plant (CS1, CS2, and CS3)
Iman Nowrouzi, Amir H. Mohammadi, Abbas Khaksar Manshad   +2 more
wiley   +1 more source

Synthesis of novel tryptamine and β-carboline derivatives via palladium-catalyzed reaction of bromotryptamine with organic boronic acids

Open Chemistry, 2005
Fekete Melinda, Kolonits Pál, Hien Ngo, Novák Lajos   +3 more
doaj   +1 more source

Alkaloid Profile of Fifteen Different Species of <i>Narcissus</i> L. (Amaryllidoideae) Collected in Spain. [PDF]

Plants (Basel)
Rodríguez-Escobar ML, Martínez-Francés V, Ríos S, Feresin GE, Borges WS, Bastida J, Torras-Claveria L, Tallini LR.   +7 more
europepmc   +1 more source