Results 81 to 90 of about 1,703,017 (234)

Bent CNN bond of diazo compounds, RR’(C=N+ =N?) [PDF]

open access: yes, 2012
The reaction of ninhydrin with benzophenone hydrazone afforded 2-diazo-3-diphenylmethylenehydrazono-1-indanone 1 and 2-diazo-1,3-bis(diphenylmethylenehydrazono)indan 2.
小林, 啓二   +4 more
core   +1 more source

Multicomponent reactions for DNA‐encoded library construction: Scaffold diversity and reaction engineering strategies

open access: yesBulletin of the Korean Chemical Society, EarlyView.
Abstract DNA‐encoded libraries (DELs) enable large‐scale screening for hit identification, but accessing sp3‐rich, three‐dimensional chemotypes beyond flat, aromatic scaffolds remains challenging. Multicomponent reactions (MCRs) assemble such complexity from simple building blocks in a single step, and reaction‐engineering strategies have extended on ...
Jimin Moon   +3 more
wiley   +1 more source

Diarylmethyl Ethers for the Protection of Polyols

open access: yesJournal of Chemistry, 2013
The paper discusses the use of diarylmethyl ethers for the protection of hydroxyl groups, in particular, carbohydrate hydroxyl groups. The formation of these ethers can be done nonselectively by the thermal reactions of diryldiazomethanes via a carbene ...
Sigthor Petursson
doaj   +1 more source

Fe-Catalyzed Olefin Hydroamination with Diazo Compounds for Hydrazone Synthesis

open access: yes, 2016
A novel Fe-catalyzed olefin hydroamination with diazo compounds for accessing hydrazones has been developed. Diazo compounds are used as radical acceptors and can be trapped by the in situ generated alkyl radical toward C–N bond formation.
Jing Zheng (65946)   +2 more
core   +1 more source

Nanoagonist‐mediated spatiotemporal reprogramming of macrophage phenotypes to potentiate tumor immunotherapy

open access: yesBMEMat, EarlyView.
This review systematically summarizes the major molecular mechanisms governing TAM polarization and their coordinated interactions. It further highlights recent advances in nanoagonist‐based strategies that intervene in these pathways to reprogram TAMs, critically discussing their therapeutic potential, current limitations, and translational prospects.
Siqi Fang   +7 more
wiley   +1 more source

On the strong difference in reactivity of acyclic and cyclic diazodiketones with thioketones: experimental results and quantum-chemical interpretation

open access: yesBeilstein Journal of Organic Chemistry, 2015
The 1,3-dipolar cycloaddition of acyclic 2-diazo-1,3-dicarbonyl compounds (DDC) and thioketones preferably occurs with Z,E-conformers and leads to the formation of transient thiocarbonyl ylides in two stages.
Andrey S. Mereshchenko   +5 more
doaj   +1 more source

C‐Terminal Functionalization Methods of Amino Acids, Peptides, and Proteins

open access: yesChemistry – A European Journal, EarlyView.
C‐terminal functionalization offers powerful routes to peptide and protein diversification, yet epimerization, hydrolysis, and selectivity remain key challenges. This Review surveys enzymatic, decarboxylative, and condensation strategies, highlighting advances toward chemo‐ and regioselective, protecting‐group‐free, atom‐efficient methods applicable to
Jay Hanssens   +3 more
wiley   +1 more source

Trends and Future Directions in Organic Chemistry for Drug Discovery

open access: yesChemistry – A European Journal, EarlyView.
Organic synthesis is being reshaped by the convergence of catalytic innovation, automation, artificial intelligence, and emerging therapeutic modalities. Late‐stage functionalization, photoredox and electrochemical methods, biocatalysis, flow chemistry, DELs, and proximity‐based drugs are examined as components of closed‐loop discovery.
Paweł Kozyra, Maciej Masłyk
wiley   +1 more source

Diazo compounds in the functionalization of porphyrin macrocycles

open access: yes, 2011
This highlight presents an overview on the functionalization of porphyrin macrocycles using diazo compounds.
Ana T.P.C. Gomes   +2 more
core   +1 more source

Azoimidazolium Salts as a Platform for Persistent Neutral Aminyl Radicals and Mesoionic Carbene Au(I) Complexes as Cell‐Permeable Fluorophores

open access: yesChemistry – A European Journal, EarlyView.
Strategic electronic matching between imidazolium salts and aryldiazonium salts enables a chromatography‐free route to versatile azoimidazolium scaffolds. Fine‐tuning the substituents unveils a powerful dichotomy: strong ─OMe resonance stabilizes highly persistent neutral aminyl radicals (up to 3 weeks), whereas the superior ─NMe2 donor strength yields
Diego Dusso   +6 more
wiley   +1 more source

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