Results 171 to 180 of about 112,449 (386)

Gas-liquid chromatography-mass spectrometry of synthetic ceramides

Journal of Lipid Research, 1969
Two series of ceramides with either sphingosine (sphing-4-enine) or sphinganine as base and with one of the saturated fatty acids C16, C18, C20, C22, C24, C26, or oleic acid were analyzed as the 1,3-di-O-trimethylsilyl ether derivatives by gas ...
Bengt Samuelsson, Karin Samuelsson
doaj  

Activation of Allenes by Diferrocenylphosphenium Ion: Isolation of a Wheland Intermediate of Ferrocene

ChemistryEurope, EarlyView.
A kinetically stable Wheland intermediate of the electrophilic aromatic substitution at ferrocene is isolated from the reaction of the diferrocenylphosphenium ion with the allene 2‐(trimethylsilyl)‐2,3‐pentadiene and fully characterized. The reaction of the diferrocenylphosphenium ion with four terminal allenes follows two different pathways, via allyl
Corina Stoian, Carolin Exner, Pim Puylaert, Moritz Hornig, Serhiy Demeshko, Malte Fischer, Emanuel Hupf, Jens Beckmann   +7 more
wiley   +1 more source

Eine einfache und ergiebige Synthese für Bis(trimethylsilyl)- und Bis(trimethylgermyl)quecksilber / A Simple and High Yielding Synthesis for Bis(trimethylsilyl)- and Bis(trimethylgermyl)mercury [PDF]

, 1981
L. Rösch, Gerald Altnau, Ekkehard Hahn, Hans Havemann   +3 more
openalex   +1 more source

Highly Electron‐Donating Antiaromatic N,N′‐Dimethyldiazaporphyrins via Reductive Dimethylation

ChemistryEurope, EarlyView.
Treatment of Ni(II) 5,15‐diazaporphyrins with sodium dispersion in the presence of dimethyl sulfate efficiently affords Ni(II) N,N′‐dimethyl‐5,15‐diazaporphyrins, which exhibit antiaromaticity and sufficient stability under ambient conditions. These reduced diazaporphyrins are highly electron donating, leading to the formation of charge transfer ...
Kohei Ohtake, Hideaki Takano, Hiroshi Shinokubo   +2 more
wiley   +1 more source

Trimethylsilyl Triflate Induced Reaction of Humulene 6,7-Epoxide. Cyclization to 5-Hydroxy-4,8,11,11-tetramethyltricyclo[6.3.0.0^2,4]undec-9-ene [PDF]

, 1982
Haruhisa Shirahama, Shizuaki Murata, Terunori Fujita, B.R. Chhabra, Ryōji Noyori, Takeshi Matsumoto   +5 more
openalex   +1 more source

Small Molecule Activation by Metallylenes and their Follow‐Up Reactions

ChemistryEurope, EarlyView.
Metallylenes offer a promising, tunable platform for small molecule activation, combining transition metal‐like reactivity with earth abundance. Ligand modifications and computational insights have unlocked new catalytic pathways, expanding their potential in sustainable synthesis.
Eveline H. Tiekink, Matthijs W. Kragtwijk, Trevor A. Hamlin   +2 more
wiley   +1 more source

Indole Synthesis via Allenyl Ester; Enantioselective Total Synthesis of Geissoschizoline

ChemistryEurope, EarlyView.
An indole synthesis via an allenyl ester intermediate at ambient temperature has been developed. The mild reaction conditions allow the use of a broad range of substrates. Notably, the utility of this approach is demonstrated through the asymmetric total synthesis of geissoschizoline, a Strychnos‐type monoterpenoid indole alkaloid.
Sohsuke Moriue, Honami Nishioka, Yuto Fukuda, Hiromitsu Takayama, Mariko Kitajima, Hayato Ishikawa   +5 more
wiley   +1 more source

Positive regulation of root-knot nematode control in Capsicum through bioactive compounds derived from plant seeds cake. [PDF]

Sci Rep
Mostafa El-Ansary MS, Hegazy WK, Hamouda RA.   +2 more
europepmc   +1 more source

Tris[bis(trimethylsilyl)amido](trimethylsilylimido)uranium(V) [PDF]

, 1988
A. Zalkin, John G. Brennan, Richard A. Andersen   +2 more
openalex   +1 more source

The Azidofunctionalization of Alkenes

ChemistryEurope, EarlyView.
The azidofunctionalization of alkenes offers a powerful strategy for synthesizing nitrogen‐containing compounds by installing both an azide and a second functional group in one step. This approach, employing photoredox catalysis, transition metals, and radical methods, is efficient, selective, and versatile, with applications in pharmaceuticals and ...
Pierre Palamini, Jerome Waser
wiley   +1 more source