Results 31 to 40 of about 6,752 (176)

Copper-catalyzed 2,3-dihydro-1,2,4-triazoles synthesis through [3+2]-cycloaddition of nitrile ylides with azodicarboxylates

open access: yesGreen Synthesis and Catalysis
A copper-catalyzed three-component reaction of diazo compounds, nitriles, and azodicarboxylates to construct 2,3-dihydro-1,2,4-triazoles is reported. Key to the success is the utilization of azodicarboxylates to trap the in-situ formed nitrile ylides ...
Bao-Gui Cai, Qian Li, Jun Xuan
doaj   +1 more source

Pyridine Scaffolds, Phenols and Derivatives of Azo Moiety: Current Therapeutic Perspectives

open access: yesMolecules, 2021
Synthetic heterocyclic compounds have incredible potential against different diseases; pyridines, phenolic compounds and the derivatives of azo moiety have shown excellent antimicrobial, antiviral, antidiabetic, anti-melanogenic, anti-ulcer, anticancer ...
Tehreem Tahir   +6 more
doaj   +1 more source

Traditional and New methods for the Preparation of Diazocarbonyl Compounds

open access: yesAnais da Academia Brasileira de Ciências, 2018
For many years diazocarbonyl compounds have been studied due to their versatility and usability in many chemical transformations. In this review, we summarize the traditional methods to prepare these compounds as well as the new methods and recent ...
ANTONIO C.B. BURTOLOSO   +2 more
doaj   +1 more source

Enantioselective three-component aminomethylation of α-diazo ketones with alcohols and 1,3,5-triazines

open access: yesNature Communications, 2020
Strategies for enantioselective α-aminomethylation of carbonyl compounds rely on the chiral activation of stable ketones substrate. Here, the authors report a rhodium/chiral phosphoric acid cooperative catalysis for the three-component reaction of α ...
Jiuwei Che   +4 more
doaj   +1 more source

Recent Advances in the Synthesis of Aromatic Azo Compounds

open access: yesMolecules, 2023
Aromatic azo compounds have -N=N- double bonds as well as a larger π electron conjugation system, which endows aromatic azo compounds with wide applications in the fields of functional materials.
Meng-Yun Zhao   +2 more
doaj   +1 more source

Electrosynthesis of Stabilized Diazo Compounds from Hydrazones

open access: yesOrganic Letters, 2022
An electrochemical synthesis of diazo compounds from hydrazones in yields as high as 99% was performed. This method was elaborated as a useful synthetic method and demonstrated on various diazo compounds (24 examples). Apart from exhibiting an efficiency that matched that of commonly used harsh and toxic chemical oxidants, this reaction is practically ...
Nour Tanbouza   +6 more
openaire   +2 more sources

Direct Laser Writing of Magnetic Micro Actuators With a Stimulus‐Responsive Compliant Hinge

open access: yesAdvanced Materials Technologies, EarlyView.
This study presents a versatile modular design strategy for adaptive 3D microactuators. Using two‐photon‐induced C,H insertion reactions within solid polymer layers, chemically distinct hinge and stimulus responsive materials are patterned in one step. The hinge's properties enable tunable motion, mechanical control, and reconfigurable actuation across
Eleonora Galli   +4 more
wiley   +1 more source

Facile and diastereoselective arylation of the privileged 1,4-dihydroisoquinolin-3(2H)-one scaffold

open access: yesBeilstein Journal of Organic Chemistry, 2022
A practically convenient and streamlined protocol for the trans-diastereoselective introduction of an aryl substituent at position 4 of the 1,4-dihydroisoquinol-3-one (1,4-DHIQ) scaffold is presented.
Dmitry Dar’in   +3 more
doaj   +1 more source

Spatial Control Over Tether‐Tunable Coordination on Palladium for Divergent Synthesis of Bicyclo[n.1.0]alkanes via Oxidative Cyclopropanation of Enynes

open access: yesAdvanced Science, EarlyView.
We have developed a Pd‐catalyzed oxidative cyclopropanation of 1,n‐enynes employing cyclic diacyl peroxides as bifunctional reagents that serve as both tether‐tunable oxidants and spatially controlled dicarboxylate anions. ABSTRACT Bicyclo[n.1.0]alkanes are highly valuable scaffolds in drug discovery and synthetic chemistry.
Ting Yuan, Lei Shi
wiley   +1 more source

Access to cyclopropanes with geminal trifluoromethyl and difluoromethylphosphonate groups

open access: yesBeilstein Journal of Organic Chemistry, 2023
A synthetic route to the bench-stable fluorinated masked carbene reagent diethyl 2-diazo-1,1,3,3,3-pentafluoropropylphosphonate, bearing a trifluoromethyl and a difluoromethyl group is reported for the first time.
Ita Hajdin   +5 more
doaj   +1 more source

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