Results 191 to 200 of about 205,384 (273)

Induced Photoelectron Circular Dichroism as a Probe for Distinguishing Diastereotopic Lone Electron Pairs

Angewandte Chemie, EarlyView.
Gas‐phase complexation of chiral methyloxirane by achiral phenol results in induced chiroptical response of phenol. Two pseudo enantiomer complexes are observed, corresponding to hydrogen bonding from phenol to either of the lone electron pair of the methyloxirane oxygen, denoted as Pro R and Pro S, with opposite chiral deformation of phenol and ...
Etienne Rouquet, Valéria Lepère, Gustavo A. Garcia, Laurent Nahon, Rodolphe Vuilleumier, Anne Zehnacker   +5 more
wiley   +2 more sources

Development of new pyrazole-thiophene hybrids: synthesis, anticancer assessment, and molecular docking insights. [PDF]

RSC Adv
Samy S, Mahmoud SE, Abdel-Galil E, Abdel-Latif E, Said GE.   +4 more
europepmc   +1 more source

Mixed‐Functionalized Acylgermanes Result in Wavelength‐Controlled Fragmentation

Angewandte Chemie, EarlyView.
Selective radical generation from PEG‐acylgermanes is achieved by controlling the used wavelength. Distinct aryl‐carbonyl units undergo wavelength‐dependent α‐cleavage, producing radicals with different reactivities. UV/Vis, TD‐DFT, and photo‐CIDNP spectroscopy confirm that small adjustments in light input directly dictate radical identity and ...
André Culum, Manfred Drusgala, Roland C. Fischer, Anne‐Marie Kelterer, Mario Leypold, Dmytro Neshchadin, Michael Haas   +6 more
wiley   +2 more sources

Mechanistic insights into hydroxy(tosyloxy)iodobenzene-mediated ditosyloxylation of chalcones: a DFT study. [PDF]

Beilstein J Org Chem
Parkash J, Saini S, Saini V, Bains O, Kamal R.   +4 more
europepmc   +1 more source

Bent N‐Heterocyclic Allenes From a Well‐Defined Titanium Vinylidene Complex

Angewandte Chemie, EarlyView.
The syntheses and the structures of N‐heterocyclic allenes are reported. Allenes bearing fluorenylidene capping groups show markedly bent C═C═C units, a carbene‐like reactivity, and they can act as potent C‐donor ligands for metal complexes. ABSTRACT Allenes typically display a linear geometry. A notable exception occurs in allenes bearing two electron‐
Bastiaan Kooij, Damien W. Chen, Rosario Scopelliti, Farzaneh Fadaei‐Tirani, Kay Severin   +4 more
wiley   +2 more sources

Non-Transition-Metal-Mediated Electrochemical Oxidations of Alcohols to Aldehydes and Ketones

SynOpen
Conall Molloy, Kevin Lam
doaj   +1 more source

Asymmetric Ketone Diene Coupling via Stereodivergent Copper Catalysis. [PDF]

J Am Chem Soc
Liu J, Zhang Z, Troya D, Chen M.
europepmc   +1 more source

Chiral Heptagon‐Embedded Double [6]Helicenes via Scholl Reaction

Angewandte Chemie, EarlyView.
One bond makes the difference–two chiral and twisted polycyclic aromatic hydrocarbons (PAHs) show different emission behavior. The more flexible one (top) shows a double emission with one having a large anti‐Stokes shift. The two peaks are assigned to different conformers of one and the same compound.
Dan Wang, Philipp Penert, Lars Schneider, Moritz P. Schuldt, Frank Rominger, Felix Deschler, Michael Mastalerz   +6 more
wiley   +2 more sources

Photocatalytic Cross‐Coupling of Phenols and Heteroaryl Halides With Machine Learning‐Guided Reaction Prediction

Angewandte Chemie, EarlyView.
Photocatalytic cross‐coupling: A redox‐neutral photochemical method enables direct C(sp2)─C(sp2) bond formation between phenols and heteroaryl halides using an organic dye and base. Complementary radical generation allows efficient cross‐coupling in up to 91% yield. Mechanistic studies, DFT, HTE, and machine learning rationalize and predict reactivity,
Matthew C. Carson, Alice Wu, Kalyana B. Duggal, Madeline E. Rotella, Marisa C. Kozlowski   +4 more
wiley   +2 more sources

Epimerization of chlorophyll derivatives [PDF]

, 1992
Mazaki, Hitoshi, Scheer, Hugo, Struck, Andreas, Takahashi, Terumi, Watanabe, Tadashi   +4 more
core   +1 more source