Results 61 to 70 of about 174,959 (338)

Iodoarene-Catalyzed Cyclizations of Unsaturated Amides [PDF]

open access: yes, 2015
The cyclization of N-alkenylamides catalyzed by iodoarenes under oxidative conditions is presented. Five-, six-, and seven-membered rings with a range of substitutions can be prepared by this route.
Ali Alhalib   +30 more
core   +1 more source

DENTA: A Dual Enzymatic Nanoagent for Self‐Activating Tooth Whitening and Biofilm Disruption

open access: yesAdvanced Functional Materials, EarlyView.
The nanoapatite with dual enzymes (DENTA) accumulates in dentinal tubules, reducing hypersensitivity caused by dental nerve exposure and facilitating continuous ROS generation through salivary glucose for effective, long‐term whitening. The dentin structures remain non‐destructive due to the low concentration of ROS, demonstrating excellent cell ...
Junseok Kim   +13 more
wiley   +1 more source

Direct synthesis of N-trifluoromethyl amides via photocatalytic trifluoromethylamidation

open access: yesNature Communications
N-CF3 amides are promising targets for pharmaceutical and agrochemistry. Unfortunately, there is a defluorination problem of N-CF3 amine starting materials when using common amide bond formation method.
Ru Zhong Zhang   +3 more
doaj   +1 more source

Ionic Control of Microstructure and Lubrication in Charged, Physically Cross‐Linked Hydrogels

open access: yesAdvanced Functional Materials, EarlyView.
Here, charged, physically cross‐linked poly(methacrylamide‐co‐methacrylic acid) hydrogels stabilized by a short‐range attractive, long‐range repulsive potential is investigated. This work uncovers how salt addition alters not only swelling, but also the microstructure and dynamics, near‐surface stiffness and charge, and ultimately, its lubricity. Salts
Alexander Deptula   +1 more
wiley   +1 more source

USE OF DIFFERENT EXTENDERS TO CRYOPRESERVATION OF MANGALARGA MARCHADOR SPERM

open access: yesCiência Animal Brasileira, 2015
The techniques applied to animal reproduction such as artificial insemination, transfer and in vitro production of embryos, heat synchronization and induction, and gametes cryopreservation have been more utilized in veterinary practice each day ...
Jessica Neri Nascimento   +3 more
doaj   +1 more source

Amide Activation by Tf2O: Reduction of Amides to Amines by NaBH4 under Mild Conditions [PDF]

open access: yes, 2010
An expeditious and practical method for the reduction of amides to amines is reported. The method is consisted of activation of amides with Tf2O followed by reduction with sodium borohydride in THF at room temperature.
Huang, Pei-Qiang   +4 more
core   +1 more source

A Peptide Nucleic Acid‐Functionalized Heterojunction Thin Film Transistor as a Scalable and Reusable Platform for Label‐Free Detection of MicroRNA

open access: yesAdvanced Functional Materials, EarlyView.
A miniaturized, label‐free, and enzyme‐free biosensor (miR‐TFT) enables direct electrical detection of microRNA (miRNA) with single‐nucleotide specificity and a detection limit of 0.6 fM. Built on a tri‐channel In2O3/ZnO heterojunction and functionalized with bespoke peptide nucleic acid (PNA) probes, the device is robust, reusable, and compatible with
Wejdan S. Al Ghamdi   +5 more
wiley   +1 more source

Chain Length of Amphipathic-Type Thioesters Dramatically Affects Reactivity in Aqueous Amidation Reactions with Cysteine Esters

open access: yesSynOpen, 2017
The reaction of five amphipathic-type thioesters, CH3(CH2) m COS(CH2) n COONa (m + n = 12), with cysteine hexyl, butyl, and ethyl esters were studied in aqueous medium.
Ikumi Otomo   +3 more
doaj   +1 more source

Biologically Active Compounds. II. The Synthesis of β-CarboxY-γ-butyrolactone Derivatives [PDF]

open access: yes, 1968
Amide derivatives of γ-substituted paraconic and aconic acids have been synthesized. Ultraviolet spectra of the aconic acid derivatives showed characteristic fine structure in the region of 245 to 280 ...
Isikawa, Tatsuo   +2 more
core   +1 more source

Self‐Immolative Activatable Nanoassembly toward Immuno‐Photodynamic Therapy in TME

open access: yesAdvanced Functional Materials, EarlyView.
A quinone methide‐gated, self‐immolative, H2O2‐responsive nano‐photosensitizer (Pyz/PS) is developed for targeted immuno‐photodynamic therapy. Pyz/PS selectively activates within tumor microenvironments, restores photosensitizer activity, generates ROS, and depletes intracellular GSH, enhancing oxidative stress.
Jing Li   +10 more
wiley   +1 more source

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