Results 121 to 130 of about 48,499 (273)

Pd‐Catalyzed C─C Bond Borylation of Biphenylenes Leading to Tri‐Ortho‐Substituted Biaryls

Chemistry – A European Journal, EarlyView.
Palladium‐catalyzed ring‐opening C─C borylation of 1‐substituted biphenylenes yields a range of o,o,o′‐trisubstituted biaryls with two ortho‐boryl groups via selective cleavage of the least hindered C─C bond. The resulting diborylated products are readily amenable to sequential, site‐selective postfunctionalization.
Robyn V. Presland, Konstantin V. Luzyanin, Luke A. Wilkinson, Oliver L. Jacobs, Nathan R. Halcovitch, Alexey G. Sergeev   +5 more
wiley   +1 more source

Regioselectivity in the multicomponent reaction of 5-aminopyrazoles, cyclic 1,3-diketones and dimethylformamide dimethylacetal under controlled microwave heating

Beilstein Journal of Organic Chemistry, 2012
The multicomponent reaction of 5-aminopyrazole derivatives with cyclic 1,3-dicarbonyl compounds and dimethylformamide dimethylacetal (DMFDMA) in DMF at 150 °C under controlled microwave heating afforded regioselectively 8,9-dihydropyrazolo[1,5-a ...
Kamal Usef Sadek, Ramadan Ahmed Mekheimer, Tahany Mahmoud Mohamed, Moustafa Sherief Moustafa, Mohamed Hilmy Elnagdi   +4 more
doaj   +1 more source

Step-Wise Computational Synthesis of Fullerene C60 derivatives. 1.Fluorinated Fullerenes C60F2k

, 2009
The reactions of fullerene C60 with atomic fluorine have been studied by unrestricted broken spin-symmetry Hartree-Fock (UBS HF) approach implemented in semiempirical codes based on AM1 technique. The calculations were focused on a sequential addition of
A. A. Gakh, A. A. Gakh, A. A. Gakh, A. A. Gakh, A. A. Popov, A. Szabo, B. W. Clare, B. W. Clare, B. W. Clare, B. W. Clare, B. W. Clare, D. A. Zhogolev, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. R. Davidson, F. N. Tomilin, H. Zabrodsky, I. Kaplan, I. S. Neretin, J. A. Pople, J. H. Holloway, J. Hachmann, K. B. Wiberg, K. Balasubramania, K. Hedberg, K. Takatsuka, L. G. Bulusheva, L. Hedberg, L. Noodleman, N. Matsuzawa, O. V. Boltalina, O. V. Boltalina, P. J. Krusic, P. K. Berzigiyarov, R. J. Papoular, R. L. Jaffe, R. Mitsumoto, R. Taylor, R. Taylor, S. Dutta, S. G. Semenov, S. Grimme, S. I. Troyanov, S. Kawasaki, U. Barth von, V. N. Staroverov   +54 more
core   +1 more source

Boron Neutron Capture Therapy at a Crossroads: Translational Gap and Emerging Delivery Agents

Chemistry – A European Journal, EarlyView.
This review surveys recent advances in boron delivery agents for BNCT, emphasizing the shift from classical small molecules to multifunctional nanocarriers and theranostic systems. By integrating targeting, imaging, and therapy, next‐generation boron compounds aim to bridge the gap between (bio)chemical innovation and clinical translation.
Christoph Selg, Evamarie Hey‐Hawkins
wiley   +1 more source

Synthetic Strategies for Activity‐Based Probes to Decode Ubiquitin‐Like Modifiers

Chemistry – A European Journal, EarlyView.
ABSTRACT Ubiquitin‐like proteins (Ubls) such as SUMO, NEDD8, ISG15, URM1, UFM1, FAT10, ATG8/ATG12, and FUBI are essential regulators of cellular homeostasis, controlling processes from protein stability and trafficking to immune signaling and autophagy.
Saibal Chanda, Alan Pham, SreeNidhi Karnati, Natalia Soto Rodriguez, Alyssa Toner, Wenshe Ray Liu   +5 more
wiley   +1 more source

Photoinduced Coupling of Acetylenes and Quinone in the Solid State as Preorganized Donor−Acceptor Pairs [PDF]

, 1998
Crystalline electron donor−acceptor (EDA) complexes of various diarylacetylenes (DA) and dichlorobenzoquinone (DB) are isolated and structurally characterized by X-ray crystallography.
Bosch, E., Hubig, S. M., Kochi, Jay K., Lindeman, Sergey V.   +3 more
core   +1 more source

Dual Ligand‐Enabled Nondirected C─H Olefination of (Hetero)Arenes for the Synthesis of Clickable Derivatives

Chemistry – A European Journal, EarlyView.
We report an efficient method for late‐stage installation of “clickable” alkyne groups into diverse (hetero)arenes. Using a dual‐ligand palladium catalyst that combines an NASA ligand with an N‐heterocycle, an acrylate unit bearing a terminal alkyne can be introduced via nondirected C─H activation.
Tommaso Braga, Maria Hergert, Manuel van Gemmeren   +2 more
wiley   +1 more source

Addition Reactions of Phosphorus‐Centered Radicals onto Olefins: Interplay Between Stability and Reactivity

Chemistry – A European Journal, EarlyView.
The energetics of the addition reaction of P‐centered radicals onto alkenes are primarily ruled by the stability of the attacking radical, as outlined by the computational screening of a wide range of reactions. In addition, donor‐acceptor substituents at the olefin have an important tuning role.
Meng Yang, Julianna Oláh, Zoltán Benkő   +2 more
wiley   +1 more source

Metadynamics with Discriminants: a Tool for Understanding Chemistry

, 2018
We introduce an extension of a recently published method\cite{Mendels2018} to obtain low-dimensional collective variables for studying multiple states free energy processes in chemical reactions.
Mendels, Dan, Parrinello, Michele, Piccini, GiovanniMaria   +2 more
core   +2 more sources

Enantioselectivity in Transition Metal Catalyzed Propargylic Substitution Reactions: A Theoretical Perspective

Chemistry – A European Journal, EarlyView.
Recent theoretical efforts to elucidate the origin of enantioselectivity in transition metal‐catalyzed propargylic substitution reactions are highlighted in this review. ABSTRACT In recent years, asymmetric catalytic propargylic substitution reactions have undergone remarkable development, enabling the construction of chiral carbon centers adjacent to ...
Ken Sakata, Yoshiaki Nishibayashi
wiley   +1 more source