Results 141 to 150 of about 289,056 (278)

Unlocking Catalyst Activation as a Critical Bottleneck in Cross‐Coupling Reactions: Room‐Temperature Couplings of Weak Nucleophiles Enabled by [Pd(1‐MeNAP)TFA]2 Precatalysts

Angewandte Chemie International Edition, EarlyView.
In many Pd‐catalyzed cross‐couplings, catalyst performance has been found to be limited by catalyst activation. Methylnaphthyl (MeNAP) palladium trifluoroacetate dimers are presented as easy‐to‐store and easy‐to‐handle precursors, which rapidly activate under reaction conditions, even when only weakly coordinating, non‐reducing nucleophiles are present.
Sourav Manna, Henric F. Janning, Nikolaos V. Tzouras, Jane Anto Simplica Sagayaraj, Fadil Faizal Mannighayil, Angelino Doppiu, Lukas J. Gooßen   +6 more
wiley   +1 more source

Controlling the Guanidinium Cation Rotation by Cation–π Interactions

Angewandte Chemie International Edition, EarlyView.
A lanthanide π‐container has been employed to trap a guanidinium cation inside the aromatic cavity by cation–π interactions. X‐ray crystallography and solid‐state nuclear magnetic resonance (NMR) spectroscopy at fast magic‐angle spinning (MAS) frequencies have been utilized to probe the underlying host–guest interactions.
Hannah Busch, Lennart Günzel, Ettore Bartalucci, Robert Schuster, Christian Zocher, Martin Börner, Chandan K. Das, Florian Taube, Björn Corzilius, Maria Fyta, Matthias Ernst, Berthold Kersting, Thomas Wiegand   +12 more
wiley   +1 more source

Protein Structure Determination by Racemic and Quasi-Racemic X-Ray Crystallography. [PDF]

Chembiochem
Kent SBH.
europepmc   +1 more source

Detector alignment for X-ray crystallography using <i>Millepede-II</i>. [PDF]

J Appl Crystallogr
White TA.
europepmc   +1 more source

Breaking barriers: transitioning from X-ray crystallography to cryo-EM for structural studies. [PDF]

Acta Crystallogr D Struct Biol
Zafar H, Malone KL, Singh AK, Cianfrocco MA, Glass KC.   +4 more
europepmc   +1 more source

Synthesis, X-ray crystallography and antimicrobial activity of 2-cyanoguanidinophenytoin. [PDF]

Sci Rep, 2023
Mabied AF, Moustafa AH, Abdelhamid AA, Tiama TM, Amer AA.   +4 more
europepmc   +1 more source

Asymmetric α‐Alkylation With Activated and Unactivated Electrophiles by a Highly Productive and Recyclable Lewis Acid/Imidazolium Catalyst

Angewandte Chemie International Edition, EarlyView.
An air‐stable, easily prepared, bifunctional Cu(II)/imidazolium complex enables highly enantioselective α‐alkylation of 1,3‐dicarbonyls with outstanding productivity (TON up to 1740). Highlights include broad electrophile scope spanning π‐activated and nonactivated reagents, stereo‐retentive allylation, simple catalyst synthesis, and efficient catalyst
Johanna Haußmann, Alexander Beck, Dominik Hornung, Michael Mistele, Alexander Allgaier, Wolfgang Frey, Joris van Slageren, Johannes Kästner, René Peters   +8 more
wiley   +1 more source

X-ray crystallography [PDF]

, 2020
openaire   +2 more sources

PEO-sheathed liquid jets increase sample delivery stability for serial femtosecond X-ray crystallography. [PDF]

Sci Rep
Vakili M, Bajt S, Bielecki J, Botha S, Cerniglia C, Chapman HN, Deiter C, de Wijn R, Dörner K, E J, Fromme P, Fromme R, Gañán Calvo AM, Han H, Huynh PBN, Kim C, Kloos M, Koua FHM, Letrun R, Meza-Aguilar JD, Montanero JM, Morin K, Popelar T, Rubio González A, Schmidt C, Sharma S, Sobolev E, Tseng JT, Turkot O, Wrona A, Yang JH, Yogaganeshan G, Bean R.   +32 more
europepmc   +1 more source

Experimental Evidence for a Metal‐Related Function of a Cyanobactin

Angewandte Chemie International Edition, EarlyView.
Cyanobactins such as patellamides are produced by cyanobacteria profusely and have been studied extensively, but almost exclusively for their cytotoxic properties. Discussed is unprecedented experimental evidence for a metal‐related biological function – likely CO2 transport from the ascidian to the cyanobacterial symbiont.
Philipp Baur, Timothy A. Hill, Kai‐Chen Wu, Junxian Lim, Brett M. Paterson, Gunasekaran Velmurugan, Bernard M. Degnan, David P. Fairlie, Peter Comba   +8 more
wiley   +1 more source