The archaeology of human bones [Electronic book] / Simon Mays.
The archaeology of ethnicity : constructing identities in the past and present [Electronic book] / Siân Jones.
Shear zones in granular mixtures of hard and soft particles with high and low friction
DOI: 10.1039/D4SM00100A, Paper
Granular materials show inhomogeneous flows characterized by strain localization.
The content of this RSS Feed (c) The Royal Society of Chemistry
Nickel-catalyzed γ-alkylation of cyclopropyl ketones with unactivated primary alkyl chlorides: balancing reactivity and selectivity via halide exchange
DOI: 10.1039/D4RA02616K, Paper
Nickel-catalyzed cross-electrophile coupling of cyclopropyl ketones and alkyl chlorides. High reactivity and selectivity can be achieved with sodium iodide as a cocatalyst that generates a low concentration of alkyl iodide via halide exchange.
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DFT rationalization of the mechanism and selectivity in a gold-catalyzed oxidative cyclization of diynones with alcohols
DOI: 10.1039/D4CP01700E, Paper
The mechanism, regioselectivity, and chemoselectivity in a gold-catalyzed oxidative cyclization of diynones with alcohols to give furan-3-carboxylate derivatives were explored by density functional theory (DFT).
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Expedient (3+3)-annulation of carbonyl ylides with azaoxyallyl cations: formal access to oxa-benzo[c]azepin-3-ones
DOI: 10.1039/D4CC04946B, Communication
Cascade C–C/C–N bond formation of carbonyl ylides with azaoxyallyl cations generated in situ using Rh-catalysis has been accomplished in the presence of a base at room temperature.
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Facile synthesis of spiro-pyrazolone-tetrahydrofurans/pyrans: ipso-cyclization of arylidene pyrazolones with haloalcohols
DOI: 10.1039/D4NJ00447G, Paper
Facile synthesis of spiro-pyrazolone-tetrahydrofurans & pyrans by base-mediated cascade ipso-cyclization of haloalcohols & arylidine pyrazolones is realised. Features include brief reaction time, practicality, good yields and mild reaction conditions.
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Sharing our latest differential privacy milestones and advancements
Google is committed to investing in privacy-enhancing technologies (PETs) to ensure user data privacy, improving products like Google Home and Google Search.
Alleviation of Cadmium-Induced Oxidative Damage through Application of Zinc Oxide Nanoparticles and Strigolactones in Solanum lycopersicum L.
DOI: 10.1039/D3EN00796K, Paper
In this research, zinc oxide nanoparticles (ZnO NPs) are bio-synthesized using Mangifera indica leaf extract as a sustainable capping and stabilizing source. The spherical morphology, crystallinity, and average size (17.97...
The content of this RSS Feed (c) The Royal Society of Chemistry
New York City bans use of TikTok on city-owned phones
Joins US federal government, majority of states in banning the social media app on security concerns
How Will the Prabowo Administration Shape Indonesia’s Foreign Policy as a Middle Power?
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Strategic Partners or Fickle Friends? Indonesia’s Perceptions of the US-Australia Defense and Security Relationship
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Clean facts on cyclones and climate change
Higher sea surface temperatures hold out the threat of more cyclones and deep depressions in the Bay of Bengal and Arabian Sea.
Apple ships $6 billion of iPhones from India in big China shift
Synthesis of 3,5-disubstituted isoxazoles by domino reductive Nef reaction/cyclization of β-nitroenones
DOI: 10.1039/D4OB00232F, Paper
β-Nitroenones were converted into 3,5-disubstituted isoxazoles via a domino reaction promoted by tin(II) dichloride. The protocol efficiently works under both microwave and flow conditions.
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Dehydrative alkynylation of 3-hydroxyisoindolinones with terminal alkynes for the synthesis of 3-alkynylated 3,3-disubstituted isoindolinones
DOI: 10.1039/D4OB00190G, Paper
A HOTf or Fe(OTf)3-catalyzed dehydrative alkynylation of 3-hydroxyisoindolinones with terminal alkynes was developed, which represents a brand-new procedure for the synthesis of 3-alkynylated 3,3-disubstituted isoindolinones.
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Diastereoselective synthesis of functionalized spiroindolines via intramolecular ipso-iodocyclization/nucleophile addition cascade reactions of indole-tethered ynones
DOI: 10.1039/D4OB00112E, Paper
Herein, we describe a highly diastereoselective approach for synthesizing polyfunctionalized spiroindolines from indolyl-ynones involving an ipso-iodocyclization/nucleophile addition cascade.
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Copper catalyzed dehydrogenative cyclization, alkenylation towards dihydroquinolinones
DOI: 10.1039/D4OB00134F, Paper
An efficient copper-catalysized one-pot sequential synthesis of alkenylated quinolinyldihydroquinolinones is reported utilizing ketones, 1,3-cyclohexanediones, and benzyl alcohols via dehydrogenative cyclisation, followed by alkenylation. This highly straightforward method provides a mild...
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Generation of sulfones utilizing β-sulfinyl esters as masked aryl sulfinates under redox-neutral conditions
DOI: 10.1039/D4OB00238E, Communication
A method for generation of SVI sulfones from β-sulfinyl esters (SIV) under transition-metal-free non-oxidative mild conditions is presented.
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A copper-catalyzed asymmetric Friedel–Crafts hydroxyalkylation of pyrazole-4,5-diones with 5-aminoisoxazoles
DOI: 10.1039/D4OB00322E, Communication
An asymmetric Friede-Crafts hydroxyalkylation reaction was developed under the catalysis of chiral copper complexes. A variety of pyrazolone derivatives were obtained with excellent yields and enantioselectivities.
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Rh(III)-catalysed C-H annulation of cis-stilbene acids with 2-diazo-1,3-diketones: A facile access to 6,7-dihydrobenzofuran-4(5H)-one and α-pyrone scaffolds
DOI: 10.1039/D4OB00151F, Paper
An efficient Rh(III)-catalysed C-H functionalization, tandem annulation of cis-stilbene acids using 2-diazo-1,3-diketones was devised. The protocol has solely afforded 6,7-dihydrobenzofuran-4(5H)-ones using alicyclic diazocarbonyls via decarbonylation and α-pyrones with aliphatic diazo...
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Synthesis of alkenylphosphine oxides via Tf2O promoted addition–elimination of ketones and secondary phosphine oxides
DOI: 10.1039/D4OB00318G, Communication
An efficient method for the synthesis of alkenylphosphine oxides via the addition-elimination of SPOs to ketones has been developed. The reaction exhibits good yields and compatibility. Several conversions have also proven the value of this method.
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Electrochemical nickel-catalyzed cross-coupling of glycosyl thiols with preactivated phenols and ketones
DOI: 10.1039/D4OB00442F, Communication
Here we report an efficient electrochemical nickel-catalyzed cross-coupling reaction for the synthesis of S-glycosides from preactivated phenols and ketones.
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Stereoselective Synthesis of gem-Dihalopiperidines via Halo-Aza-Prins Cyclization Reaction: Access to Piperidin-4-ones and Pyridines
DOI: 10.1039/D4OB00338A, Paper
An efficient methodology for the synthesis of 4,4-dihalopiperidine derivatives has been developed from N-(3-halobut-3-en-1-yl)-4-methylbenzenesulfonamide and aldehyde catalyzed by In(OTf)3 in excellent yields. The reaction involves an initial formation of six...
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Photogenerated chlorine radicals activate C(sp3)–H bonds of alkylbenzenes to access quinazolinones
DOI: 10.1039/D4OB00129J, Communication
An Fe-catalyzed visible-light induced condensation of alkylbenzenes with anthranilamides has been developed.
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Iron-catalyzed selective construction of indole derivatives via oxidative C(sp3)–H functionalization of indolin-2-ones
DOI: 10.1039/D4OB00133H, Paper
We have developed a clean and efficient iron-catalyzed C(sp3)–H functionalization of indolin-2-ones for the chemodivergent synthesis of value-added indole derivatives, including isatins, and symmetrical and non-symmetrical isoindigos.
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BBr3-mediated dearomative spirocyclization of biaryl ynones: facile access to spiro[5.5]dienones
DOI: 10.1039/D4OB00274A, Communication
BBr3 mediated dearomative spirocyclization of biaryl ynones has been reported for the direct synthesis of spiro[5.5]dienones with a tri-substituted double bond.
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Exploring the mechanism of the reductive amination of acetophenones via Borch approach: the role of the acid catalyst
DOI: 10.1039/D4OB00160E, Paper
The energetic viability of several mechanistic variations of the reductive amination of acetophenones via the Borch approach was reexamined through density functional theory calculations. The crucial involvement of the acid...
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An FeCl3-catalyzed three-component reaction for the synthesis of β-(1,2,3-triazolyl)-ketones using DMF as a one-carbon source
DOI: 10.1039/D4OB00207E, Communication
FeCl3-catalyzed oxidative condensation of NH-1,2,3-triazoles and aryl methyl ketones and DMF has been reported.
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Regioselective synthesis of 4-arylamino-1,2-naphthoquinones in eutectogel as a confined reaction medium using LED light
DOI: 10.1039/D4OB00140K, Communication
The use of a simple carbohydrate-derived eutectogel facilitating a LED-light-induced regioselective synthesis of 4-arylamino-1,2-naphthoquinones in good yields is reported.
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Efficient synthesis of SCF3-containing 3-alkenylquinoxalinones via three-component radical cascade reaction
DOI: 10.1039/D4OB00363B, Paper
A three-component cascade reaction of quinoxalinones, alkynes and AgSCF3 toward complete E-selective SCF3-containing 3-alkenylquinoxalinones was developed.
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Base- and sulfur-promoted oxidative lactonization of chalcone-acetate Michael adducts: access to pyran-2-ones
DOI: 10.1039/D4OB00479E, Communication
A cost-effective, practical, straightforward and scalable synthesis of α-pyrones via base- and sulfur-promoted annulation of phenylacetates and chalcones is reported.
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Indonesia bans sales of Google phones days after blocking Apple's iPhone 16
Indonesia said it has banned sales of smartphones made by Alphabet's Google due to rules requiring the use of locally manufactured components
Osteoporosis can shorten your life − here’s how to prevent fractures and keep bones healthy
The key to having healthy bones for a lifetime is to take some simple preventive measures – and the earlier, the better
The five best ones
Bringing you the top five watches at the 2018 version of Salon International de la Haute Horlogerie
The phones that light up your instagram
Camera phones that will help you take your Instagram game up a notch this festival season
The real Charlotte / E. Œ. Somerville & Martin Ross ; afterword by Malcolm Jones.
The war lawyers : the United States, Israel, and juridical warfare / Craig Jones.
The medieval clergy, 800-1250 : a sourcebook / John S. Ott and Anna Trumbore Jones.
Critique du De mundo de Thomas White / Thomas Hobbes ; introduction, texte critique et notes par Jean Jacquot et Harold Whitmore Jones.
Biologist Explains How Drones Catching Whale "Snot" Helps Research
Whale research is difficult, but a conservation organization is trying to make it a bit easier with drones. WIRED's Matt Simon talks with Ocean Alliance CEO Iain Kerr about the benefits of flying the "SnotBot" into a whale's blow spout.
What If... Time zones didn't exist? | What If
Daylight saving time means we change the clocks twice a year, and the world has over 30 different time zones. Some countries span multiple different time zones, while the likes of China and India choose to have just one time zone despite the huge differences in real time from east to west. Time influences almost every aspect of our lives – yet we barely ever stop to think about what time means exactly. Studies show the Daylight Savings Time leads to spikes in heart attacks and traffic accidents, while reduced sleep due changing times is linked to increased levels of obesity. So, why do we even bother? That's the argument of some scientists, who believe the whole world should switch to Coordinated Universal Time (UTC), which is already used in aviation and in space. In this video we ask, what if we abolished time zones (and clock changes) forever? This video was produced as part of Digital Society, a publishing partnership between WIRED and Vontobel where all content is editorially independent. Visit Vontobel Impact for more stories on how technology is shaping the future of society: https://www.vontobel.com/en-int/about-vontobel/impact/
WIRED25 2020: Brie Larson, Van Jones, and Elijah Allan-Blitz on VR and Empathy
Brie Larson, Van Jones, and Elijah Allan-Blitz joined the WIRED25 event to discuss what divides us, and their approach with VR films to bridge those gaps.
The Drop In with Guy Raz | Tilane Jones on Flipping the Script
Produced by WIRED Brand Lab with Dropbox | How do you not only sustain, but grow your business during the pandemic? Guy Raz and Tilane Jones, president of the distribution company ARRAY, discuss the future of work and staying flexible to meet the needs of consumers.