Results 201 to 210 of about 15,117 (303)

Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries

Angewandte Chemie, EarlyView.
This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho, Al Vicente Riano D. Lisboa, Juntao Sun, Taeho Kang, Keary M. Engle   +4 more
wiley   +1 more source

Developmental, normal, and abnormal anatomy of the coronary sinus. [PDF]

Indian Pacing Electrophysiol J
Anderson RH, Spicer DE, Sanchez-Quintana D.   +2 more
europepmc   +1 more source

Substrate‐Controlled Enantiodivergence in Ni‐Catalyzed Access to Phosphorylated Oxindoles With Quaternary Stereocenters

Angewandte Chemie, EarlyView.
An efficient, enantiodivergent synthesis of phosphorylated oxindoles with quaternary stereocenters is achieved via a nickel‐catalyzed intermolecular Heck‐phosphorylation cascade. Employing a single chiral catalyst, either product enantiomer is selectively accessed simply by changing the alkene leaving group. DFT calculations trace this stereodivergence
Haimeng Zhu, Lewen Wang, Shihui Luo, Xinglong Zhang, Jun (Joelle) Wang   +4 more
wiley   +1 more source

COVID-19 in an adult with right isomerism and Fontan circulation: Successful management using risk stratification. [PDF]

Fujita Med J
Saito K, Yamabe S, Kojima A, Uchida H, Takigawa Y, Nakashima C, Hoshino M, Takada K, Fukui S, Yoshikawa T, Izawa H, Yamada A.   +11 more
europepmc   +1 more source

Light and Dark Cycles Control the Structural Evolution of Photoresponsive Supramolecular Systems

Angewandte Chemie, EarlyView.
Here, we report a photoswitchable synthetic peptide that, under light energy cycles, exhibits supramolecular polymorphism coupled to darkness‐driven structural self‐selection. We demonstrate that light sustains a transient assembled state in the form of helical nanoribbons, hindering the system from undergoing a transition to the disassembled state ...
Alejandro Méndez‐Ardoy, Nicolas Cissé, Adrian Sanchez‐Fernandez, Patricia Fulias‐Guzmán, Marc C. A. Stuart, Tibor Kudernac, Javier Montenegro   +6 more
wiley   +1 more source

Epidemiological investigation of fetal laterality disorders in multiple hospitals in coastal Southeastern China before and after the COVID-19 pandemic (2017-2024). [PDF]

Front Med (Lausanne)
Huang B, Weng Z, Jiang Q, Chen F, Lyu G, Wang Z, Hu J, Wu X, Su X, Ling W, Wu Q.   +10 more
europepmc   +1 more source

Pyridine C─N Transposition via Cycloaddition–Cycloreversion

Angewandte Chemie, EarlyView.
Transposition of pyridine nitrogen from the 4‐ to the 3‐position is described using two open and shut sequences: a nucleophile addition ring‐open ring‐closure, followed by a nitrile Diels–Alder cycloaddition cycloreversion. The nitrogen swap is particularly effective for tertiary alkyl substituents, transforming easily accessible para‐alkylated ...
Aífe Conboy, Michael F. Greaney
wiley   +1 more source

Accessing chiral NHC-boranes by abstraction of C₆F₅ from the B(C₆F₅)₄^- weakly coordinating anion.

Dalton Trans
Niessen N, Adjieufack AI, Tumanov N, Wouters J, Champagne B, Berionni G, Bijouard K.   +6 more
europepmc   +1 more source

Transition Metal‐Free Heteroarene Insertion Into C─C Bonds of Benzocyclobutenones

Angewandte Chemie, EarlyView.
A transition metal‐free insertion of five‐membered heteroarenes into the C─C bonds of benzocyclobutenones has been achieved under mild and operationally simple conditions. This method provides an efficient and modular approach to access fused partially saturated hetero‐polycyclic scaffolds that exist in many bioactive molecules.
Cole J. Wagner, Guangbin Dong
wiley   +1 more source

A theoretical investigation on the isomerism and the NMR properties of thiosemicarbazones

Open Chemistry, 2007
Nuwan De Silva N., Albu Titus
doaj   +1 more source