Results 61 to 70 of about 23,133 (214)

Benzo[c][1,2,5]Thiadiazole Linkers Enhance the Effectiveness of Cavity‐Containing Supramolecular Photocatalysts

Chemistry – A European Journal, EarlyView.
Seven novel supramolecular photosensitizers based on benzo[c][1,2,5]thiadiazole (BTZ) tethered to calix[4]arene (C[4]) scaffolds are reported with facile, scalable, and selective syntheses. Their abilities to produce singlet oxygen have been tested through the photo‐oxidation of α‐terpinene.
Leonardo Amicosante, Dominic Taylor, Cameron L. Campbell, Daniel M. Lambden, Georgina M. Rosair, Filipe Vilela, Scott J. Dalgarno   +6 more
wiley   +1 more source

Incorporação com I131 por biossíntese e dupla troca, identificação e isolamento do éster metílico do ácido alfa-iodo palmítico e do éster metílico do ácido oléico, da alga marinha Centroceras clavulatum (Martius, 1870)

Memorias do Instituto Oswaldo Cruz, 1976
Com iodo-131 e o emprego do método cromatográfico, foi possível isolar duas substâncias orgânicas lipídicas emuma alga marinha. Os quatro métodos químicos de análise estrutural, foram aplicados e nos deram como resultado, ser uma delas, o éster metílico ...
Arlette Takahashi
doaj   +1 more source

Stereoselective Synthesis of β‐C‐glycosides From Exoglycals Through Radical C─C Bond Formation

Chemistry – A European Journal, EarlyView.
We describe herein a convenient strategy for the preparation of β‐C‐glycosides via the addition of radical species onto exoglycals. This method is efficient, general and achieved in mild conditions starting from xanthates derivatives and using triethylborane as initiator and 4‐tert‐butylcatechol as hydrogen atom source. This hydroalkylation reaction is
Noémie Murard, Guillaume Pilet, David Gueyrard   +2 more
wiley   +1 more source

Infrared Irradiation‐Assisted Pd‐Catalyzed C(sp3)─H Arylation and Tandem Cyclization of Ortho‐Tolualdehydes

Chemistry – A European Journal, EarlyView.
A rapid and efficient protocol for the synthesis of 2‐benzylbenzaldehydes and anthracenes is reported, based on the infrared (IR) irradiation‐assisted Pd‐catalyzed C(sp3)─H arylation and the tandem C(sp3)─H arylation/electrophilic aromatic cyclization of ortho‐tolualdehydes with aryl iodides via a transient directing group (TGD) strategy.
Matteo Renato Martina, Ambra Maria Fiore, Angela Punzi, Gianluigi Albano, Roberta Ragni, Pietro Cotugno, Gianluca Maria Farinola   +6 more
wiley   +1 more source

Substituted N-Phenylpyrazine-2-carboxamides: Synthesis and Antimycobacterial Evaluation

Molecules, 2009
The condensation of chlorides of substituted pyrazinecarboxylic acids with ringsubstituted anilines yielded twelve substituted pyrazinecarboxylic acid amides.
Michaela Svobodová, Jiří Kuneš, Martin Doležal, Diana Kešetovičová, Jan Zitko   +4 more
doaj   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, EarlyView.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Infrared Irradiation‐Assisted Pd/Cu Catalysis for Sustainable C–N Cross‐Coupling Reactions

European Journal of Organic Chemistry, EarlyView.
A combined Pd/Cu catalytic system is demonstrated to be highly effective in promoting infrared irradiation‐assisted Buchwald–Hartwig aminations under nonanhydrous and open‐air conditions, using only a stoichiometric amount of a green reaction solvent.
Ambra M. Fiore, Angela Punzi, Matteo R. Martina, Pietro Cotugno, Gianluca M. Farinola   +4 more
wiley   +1 more source

Modular π‐Extended IF‐TTF Systems: Tuning Redox and Optical Properties in Donor–Acceptor and Donor–Donor Frameworks

European Journal of Organic Chemistry, EarlyView.
Donor–acceptor and donor–donor systems incorporating an indeno[1,2‐b]fluorene‐extended tetrathiafulvalene (IF‐TTF) donor motif were prepared by Suzuki coupling reactions. The compounds were studied for their optical and redox properties. The compounds showed multiredox behavior with several accessible redox states. A series of π‐extended donor–acceptor
Cecilie Rindom, Mogens Brøndsted Nielsen   +1 more
wiley   +1 more source

2‐Amino‐3H‐phenoxazin‐3‐one is a lead inhibitor of Cuscuta campestris early development: structure–activity relationships of o‐aminophenol‐derived allelochemicals

Pest Management Science, EarlyView.
Phenoxazinones caused differential types of phytotoxic effects in C. campestris early development. APO is a coherent lead inhibiting C. campestris germination and early seedling growth. Abstract BACKGROUND 2‐Amino‐3H‐phenoxazin‐3‐one (synonym: questiomycin A; abbreviated as APO or Phx‐3) is a naturally occurring phenoxazinone‐type allelochemical with ...
Cristina Díaz‐Franco, Mónica Fernández‐Aparicio, José MG Molinillo, Rosa M Varela, Francisco A Macías, Jesús G Zorrilla   +5 more
wiley   +1 more source

Surface Engineering of Ti3C2Tx MXenes via Silanol Functionalization for Improved Electrochemical Performance

Small, EarlyView.
This study explores the covalent functionalization of Ti3C2Tx using 5,5′‐bis(triisopropoxysilyl)‐2,2′‐bipyridine in different solvents, revealing that only m‐xylene enables effective covalent bonding, ensuring structural stability and preventing layer swelling.
Abelardo Sánchez‐Oliva, Verónica Montes‐García, Ke Li, Kaitlyn Prenger, Xuyun Guo, Iwona Janica, Wojciech Kukułka, Adrián Tamayo, Pilar Prieto, Paolo Samorì, Valeria Nicolosi, Artur Ciesielski   +11 more
wiley   +1 more source