Results 161 to 170 of about 27,695 (265)

Deprotonation and Alkylation of Weakly Acidic C(sp3)─H Bonds Through In Situ Generation of a Strong Hydride Base From 1,1,3,3‐Tetramethyldisiloxane and Potassium tert‐Butoxide

Angewandte Chemie, EarlyView.
The use of 1,1,3,3‐tetramethyldisiloxane (TMDSO) and potassium tert‐butoxide enables direct alkylation of weakly acidic carbon–hydrogen bonds with alkyl halides. Experimental and computational studies support the formation of a substrate‐associated hydride‐like base, providing a single‐step alternative to the classical deprotonation and electrophile ...
Piers St. Onge, Brandon White, Han Yao, Travis Dudding, Stephen G. Newman   +4 more
wiley   +1 more source

A photochemical strategy for pyrazole to imidazole conversion. [PDF]

Chem Sci
Wei Y, Kasama K, Igartua A, Yildiz DB, Ceuninck A, Dos Santos T, Büttner C, Thevenet D, Bossart M, Derdau V, Méndez M, Jubault P, Poisson T, Roure B, Leonori D.   +14 more
europepmc   +1 more source

Photometallobiocatalytic Asymmetric Radical‐Mediated Cross‐Coupling of Organotrifluoroborate Salts and Pyridotriazoles

Angewandte Chemie, EarlyView.
An enantioselective photometallobiocatalytic cross‐coupling of pyridotriazoles and secondary alkyltrifluoroborate salts is developed. Cooperative catalysis using eosin B and an engineered protoglobin combines visible‐light‐mediated radical generation with enzymatic metal carbenoid activation, affording valuable N‐heterocyclic products in excellent ...
Huanan Wang, Binh Khanh Mai, Xingjie Zhang, Chongtao Li, Peng Liu, Yang Yang   +5 more
wiley   +1 more source

A Mechanical sp2‐Jail for C60 Fullerene

Angewandte Chemie, EarlyView.
A rigid bisporphyrin receptor with an exceptionally compact 3D cavity functions as a molecular “mechanical jail”, tightly enclosing C60 fullerene. Near‐perfect shape complementarity affords ultrahigh binding affinity while imposing a large kinetic barrier for guest exchange, rendering encapsulation effectively irreversible under ambient conditions ...
A. Priscila Gia, Fernando G. Guijarro, Pau Armada, Daniel Aranda, Josefina Perles, Enrique Ortí, Juan Aragó, David González‐Rodríguez, Alberto de Juan   +8 more
wiley   +1 more source

Red-shifting squaraine dyes in the near-infrared region using perimidine heterocycles: synthesis and optical properties. [PDF]

RSC Adv
Sarasiya S, Henary M.
europepmc   +1 more source

Ionic Liquid Electrolytes for Extreme Temperature Conditions: Challenges and Perspective

Angewandte Chemie, EarlyView.
Ionic liquids (ILs) have gained great attention as safe electrolyte components in recent years. This review elucidates the temperature effects on IL‐based electrolytes from molecular configurations, physicochemical properties, and interfacial chemistry, raises the challenges and design strategies operating at low‐ and HT, providing valuable guidance ...
En Xie, Chengdong Liu, Xinghao Wang, Jian Wang, Zhen Chen, Huihua Li, Wenlong Cai, Hao Li, Yang Peng, Fanglin Wu, Stefano Passerini, Haolin Tang   +11 more
wiley   +1 more source

True Closed-Loop Recyclable Hydrogels Enabled by Imine Boronic Ester Crosslinking. [PDF]

Adv Mater
King JA, Litterio JM, Larmore SP, Lopez SA, Schmidt-Rohr K, Alzate-Sánchez DM.   +5 more
europepmc   +1 more source

Electrocatalytic Polarity Inversion of Azlactones: Access to α‐Quaternary Amino Acids with Electron‐Rich SOMOphiles

Angewandte Chemie, EarlyView.
Electrocatalytic polarity inversion of azlactones unlocks their coupling with electron‐rich reaction partners. Triarylamine‐mediated oxidation of the azlactone enolate generates an electrophilic radical intermediate that undergoes selective C4 functionalization with diverse SOMOphiles.
Paula Rodríguez, David Buedo, Alberto Vega‐Peñaloza, Kian Gosling, Stuart C. D. Kennington, Bart Limburg, Xavier Companyó   +6 more
wiley   +1 more source

The Role of Pyrrolidine in Antibacterial Drug Discovery: Clinically Approved Antibiotics, Novel Derivatives, and Future Perspectives. [PDF]

Int J Mol Sci
Rusu A, Stroia IM, Hancu G, Tanase C, Uncu L.   +4 more
europepmc   +1 more source

Sustainable Access to N‐Heterocycles: One‐Pot Cascade Synthesis of Pyrroles From Bio‐Derived Furans

Angewandte Chemie, EarlyView.
Highly dispersed platinum (Pt) clusters on Brønsted acid‐rich HY zeolite enable a one‐pot cascade conversion of bio‐derived furans and nitroarenes into pyrroles. Highly dispersed Pt sites ensure selective nitro hydrogenation, while Pt nanoparticles promote undesired over‐hydrogenation.
Haifeng Qi, Germán López Robledo, Jianglin Duan, Yujing Ren, Kathrin Junge, Matthias Beller   +5 more
wiley   +1 more source