Results 71 to 80 of about 1,621,772 (233)

Heat‐ and Light‐Directed Cycloadditions Enable a Pericyclic Cascade Reaction From a Molecular Precursor

open access: yesAngewandte Chemie, EarlyView.
A multi‐stimuli‐responsive material is designed that responds to light, heat, and mechanical force through distinct chemical reaction pathways. The pathway is directed by self‐assembly and the applied stimulus. A novel pericyclic reaction cascade is also achieved, and the mechanism is supported through density functional theory calculations.
Liulei Ma   +4 more
wiley   +2 more sources

Biological Effects of Glucosinolate Degradation Products from Horseradish: A Horse that Wins the Race

open access: yesBiomolecules, 2020
Horseradish degradation products, mainly isothiocyanates (ITC) and nitriles, along with their precursors glucosinolates, were characterized by GC-MS and UHPLC-MS/MS, respectively.
Marijana Popović   +5 more
doaj   +1 more source

Remote Desaturation of Unprotected Amines and C─H Amination of Alkanes by Polarity‐Matched N‐Radical Cations

open access: yesAngewandte Chemie, EarlyView.
Highly electrophilic N‐radical cations enable efficient and selective H‐atom transfer (HAT) of unprotected amines. In this exceedingly practical strategy, simple CuCl catalyzes an interrupted Hofmann–Löffler–Freytag (HLF) reaction to afford δ desaturated amines, aza‐heterocycles, and C─H aminated alkanes without protecting groups.
Pavitra Laohapaisan   +6 more
wiley   +2 more sources

Quantitative and Qualitative Analysis of and Seeds by UPLC-DAD and UPLC-ESI-QTOF

open access: yesNatural Product Communications, 2017
Eruca sativa and Brassica juncea belong to the Brassicaceae family and have been used traditionally for the treatment of cancer and various cardiovascular ailments.
Arti Sharma   +5 more
doaj   +1 more source

Glucosinolate breakdown products as insect fumigants and their effect on carbon dioxide emission of insects

open access: yesBMC Ecology, 2002
Background Glucosinolate breakdown products are volatile, therefore good candidates for insect fumigants. However, although they are insecticidal, the mode of action of such natural products is not clear.
Coats Joel R   +2 more
doaj   +1 more source

Cu(I) Arylsulfonate π-Complexes with 3-Allyl-2-thiohydantoin: The Role of the Weak Interactions in Structural Organization

open access: yesActa Chimica Slovenica, 2020
The present work is directed toward preparation and structural characterization of two novel Cu(I) arylsulfonate π-complexes with 3-allyl-2-thiohydantoin, namely [Cu2(Hath)4](C6H5SO3)2 (1) and [Cu2(Hath)4](p-CH3C6H4SO3)2·2H2O (2) (Hath = 3-allyl-2 ...
Andrii Fedorchuk   +3 more
doaj   +1 more source

Farnesyltransferase Enables Modular Assembly of Dual‐Functional Nanobody Conjugates for in Vivo Imaging of Inflammation

open access: yesAngewandte Chemie, EarlyView.
A modular farnesyltransferase‐based chemoenzymatic platform enables fast, site‐specific labeling of nanobodies for PET imaging of inflammation. CD11b‐targeted PET agents selectively image myeloid‐driven inflammation, while CD45‐targeted PET agents provide sensitive whole‐body immune mapping.
Sneha Venkatachalapathy   +7 more
wiley   +2 more sources

Síntese de sais de isotiourônio e sua versatilidade em reações de acetilação e na preparação de heterociclos multifuncionalizados [PDF]

open access: yes, 2011
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2011O presente trabalho foi desenvolvido visando à obtenção de novos compostos orgânicos ...
Ferreira, Misael
core  

Synergistic Silylium‐Ion and Palladium Catalysis Enables Migratory Alkene Silylation With Allylsilanes by Formal C–H/C–Si Metathesis

open access: yesAngewandte Chemie, EarlyView.
Merging silylium‐ion and palladium catalysis provides a mechanistically distinct route to allylsilanes by formal C–H/Si–H metathesis. Using allylsilanes as silicon proelectrophiles, various allylarenes undergo migrative silylation, selectively yielding (E)‐allylsilanes.
Longhui Duan   +5 more
wiley   +2 more sources

Reductive coupling of allenyl/allyl carbonate with alkyne under dual cobalt-photoredox catalysis

open access: yesNature Communications
Skipped dienes are among the most prevalent motifs in a vast array of natural products, medicinal compounds, and fatty acids. Herein, we disclose a straightforward one-step reductive protocol under Co/PC for the synthesis of diverse 1,4-dienes with ...
Subhankar Pradhan   +5 more
doaj   +1 more source

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