Results 61 to 70 of about 7,050 (214)

Sensing Techniques for Organochlorides through Intermolecular Interaction with Bicyclic Amidines

open access: yesBiosensors, 2021
Toxic organochloride molecules are widely used in industry for various purposes. With their high volatility, the direct detection of organochlorides in environmental samples is challenging.
Jong-Won Park   +4 more
doaj   +1 more source

Pyridinium N-(2'-azinyl)aminides: Regioselective synthesis of 2-alkylaminoazines [PDF]

open access: yes, 2000
The regioselective alkylation of pyridinium-N-(2'-azinil)aminides with alkyl halides under mild conditions is described. The alkylation, combined with a reduction of the N-N bond, allows an easy preparation of 2-alkylaminoazines.The authors wish to thank
Burgos Gómez, Carolina   +5 more
core   +3 more sources

Bis‐Dichlorosilyl Functionalized C4‐Cumulene With Unique Bonding Scenario

open access: yesChemistry – A European Journal, EarlyView.
Herein, we report a silylene‐functionalized C4‐cumulene (2) and investigate its bonding scenario employing computational methods such as NBO analysis, AIM, and energy decomposition analysis‐natural orbital for chemical valence (EDA‐NOCV). The EDA‐NOCV analysis showed that compound 2 prefers to possess electron‐sharing covalent sigma and dative covalent
Saroj Kumar Kushvaha   +10 more
wiley   +1 more source

Identification of a mutation in the para-sodium channel gene of the cattle tick Rhipicephalus (Boophilus) microplus associated with resistance to synthetic pyrethroid acaricides [PDF]

open access: yes, 2009
Resistance against synthetic pyrethroid (SP) products for the control of cattle ticks in Australia was detected in the field in 1984, within a very short time of commercial introduction.
Corley, S.W.   +5 more
core   +1 more source

Design and synthesis of amidine-type peptide bond isosteres: application of nitrile oxide derivatives as active ester equivalents in peptide and peptidomimetics synthesis. [PDF]

open access: yes, 2011
Amidine-type peptide bond isosteres were designed based on the substitution of the peptide bond carbonyl (C=O) group with an imino (C=NH) group. The positively-charged property of the isosteric part resembles a reduced amide-type peptidomimetic.
Fujii, Nobutaka   +7 more
core   +1 more source

Boron Neutron Capture Therapy at a Crossroads: Translational Gap and Emerging Delivery Agents

open access: yesChemistry – A European Journal, EarlyView.
This review surveys recent advances in boron delivery agents for BNCT, emphasizing the shift from classical small molecules to multifunctional nanocarriers and theranostic systems. By integrating targeting, imaging, and therapy, next‐generation boron compounds aim to bridge the gap between (bio)chemical innovation and clinical translation.
Christoph Selg, Evamarie Hey‐Hawkins
wiley   +1 more source

Novel amidines and analogues as promising agents against intracellular parasites: a systematic review [PDF]

open access: yes, 2017
Parasitic protozoa comprise diverse aetiological agents responsible for important diseases in humans and animals including sleeping sickness, Chagas disease, leishmaniasis, malaria, toxoplasmosis and others.
BOYKIN, D. W.   +5 more
core  

Copper‐ and Silver‐Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five‐ and Six‐Membered Heterocycles

open access: yesChemistry – A European Journal, EarlyView.
This review summarizes recent advances in copper‐ and silver‐catalyzed reactions of active methylene isocyanides for the synthesis of highly substituted five‐ and six‐membered heterocycles. Emphasis is placed on [3+n] cycloadditions, annulations, and asymmetric strategies, highlighting current limitations and future opportunities in heterocycle ...
Jimil George, Kyungsoo Oh
wiley   +1 more source

Amidine Dications as Superelectrophiles

open access: yesJournal of the American Chemical Society, 2009
2-Dimethylalkylammonium pyridinium and 2-dimethylalkylammonium pyrimidinium ditriflate salts are very powerful methylating agents toward phosphorus (triphenylphosphine) and nitrogen (triethylamine) nucleophiles. In competition experiments with triethylamine as nucleophile, these N-methyl disalts are more reactive methylating agents than dimethyl ...
Corr, Michael J   +5 more
openaire   +3 more sources

Dihydroquinazolinones by Titanocene‐Catalyzed Reductive Radical Addition to Quinazolinones

open access: yesChemistry – A European Journal, EarlyView.
Tri‐ and tetracyclic dihydroquinazolinones or quinazolinones by titanocene catalysis: A highly diastereoselective and efficient reductive radical addition to quinazolinones enables an unprecedented entry to pharmaceutically relevant dihydroquinazolinones by avoiding the interception of radical intermediates prior to the slow radical addition.
Thomas Heinrichs   +5 more
wiley   +1 more source

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