Results 31 to 40 of about 81,226 (245)

Oxidative [4+2] annulation of styrenes with alkynes under external-oxidant-free conditions

open access: yesNature Communications, 2018
A sequence of a Diels–Alder reaction and oxidation is a powerful route to valuable aromatic compounds. Here, the authors report a more atom-economical oxidant-free strategy involving a Diels–Alder with H2 evolution under noble-metal-free photoredox ...
Guoting Zhang   +5 more
doaj   +1 more source

Theoretical study on the Diels-Alder reaction of bromo-substituted 2H-pyrane-2-ones and some substituent vinyls [PDF]

open access: yesJournal of the Serbian Chemical Society, 2015
A DFT study of the reactivity, regio- and stereoselectivity of Diels-Alder reaction between 3-bromo, 5-bromo, and 3,5-dibromo-2(H)-pyran-2-ones and some weakly activated and unactivated alkenes has been carried out using density functional ...
Haghdadi Mina, Amani Hamed, Nab Nasim
doaj   +1 more source

Thermodynamic and Kinetic Study of Diels–Alder Reaction between Furfuryl Alcohol and N-Hydroxymaleimides—An Assessment for Materials Application

open access: yesMolecules, 2020
The study of Diels−Alder reactions in materials science is of increasing interest. The main reason for that is the potential thermoreversibility of the reaction.
Jamerson Carneiro de Oliveira   +2 more
doaj   +1 more source

Focused Ultrasound-Mediated Release of Bone Morphogenetic Protein 2 from Hydrogels for Bone Regeneration

open access: yesGels
An ultrasound-responsive hydrogel system was developed that provides on-demand release when stimulated by focused ultrasound (fUS). Diels–Alder cycloadducts crosslinked polyethylene glycol (PEG) hydrogels and underwent a retrograde Diels–Alder reaction ...
Tyus J. Yeingst   +6 more
doaj   +1 more source

Digitally Printed Eco‐Friendly Electronic Devices

open access: yesAdvanced Functional Materials, EarlyView.
Fabrication of electronics using eco‐friendly materials through digital printing routes is a promising strategy for improving life cycle sustainability and reducing the environmental impacts of conventional manufacturing. This review highlights state‐of‐the‐art eco‐friendly materials, green ink formulations, various resource‐efficient digital printing ...
Nitheesh M. Nair   +5 more
wiley   +1 more source

Biodegradable Conductors for Implantable and Wearable Transient Bioelectronics

open access: yesAdvanced Functional Materials, EarlyView.
Biodegradable conductors are essential building blocks for transient bioelectronics, enabling temporary sensing, stimulation, and energy transfer while eliminating the need for device retrieval. This review summarizes biodegradable metals, conducting polymers, ionic conductors, and conductive composites, highlighting degradation mechanisms, material ...
Yicheng Zhu, Yijun Liu, Naoji Matsuhisa
wiley   +1 more source

Ionic-Liquid-Mediated MacMillan’s Catalyst for Diels-Alder Reaction

open access: yesJournal of Chemistry, 2013
Ionic liquids were used to enhance as well as recycle the MacMillan's catalyst 1 for the Diels-Alder reaction. Using our developed protocol, Diels-Alder adducts were obtained in good yields and selectivities along the 6 times recycling of MacMillan's ...
Vivek Srivastava
doaj   +1 more source

Mechanoactive Biomaterials for Cell–Matrix Mechanotransduction

open access: yesAdvanced Materials, EarlyView.
The graphical abstract shows how individual triggers (force, light, or temperature) and combined optothermal or receptor‐targeted actuation induce material responses at the tissue, cellular, and receptor scales. Their spatial (global or focused) and temporal (continuous or cyclic) modulation determines the resulting mechanical output.
Yi‐Tung Lu   +2 more
wiley   +1 more source

The use of optically active O-alkyl ester hydrochlorides of L-phenylalanine and L-tyrosine as chiral micellar media for the catalysis of diels-alder reactions

open access: yesBulletin of the Chemical Society of Ethiopia, 2018
The effect of a range of O-alkyl ester hydrochloride surfactants derived from L-phenylalanine and L-tyrosine as catalysts on the Diels-Alder reaction between cyclopentadiene and methyl acrylate was studied.
P. Caumul   +5 more
doaj   +1 more source

Diversity of secondary metabolites from Genus Artocarpus (Moraceae) [PDF]

open access: yes, 2010
Abstrak. Hakim A. 2010. Keanekaragaman metabolit sekunder Genus Artocarpus (Moraceae). Nusantara Bioscience 2:146-156. Beberapa spesies dari genus Artocarpus (Moraceae) telah diteliti kandungan bahan alamnya.
Aliefman Hakim   +2 more
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