Results 21 to 30 of about 1,703,017 (234)

Rh(III)-catalyzed chelation-assisted C–H activation/annulation of 2-arylimidazolines with cyclic diazo-1,3-dicarbonyl compounds: a novel approach to tetracyclic annulated derivatives of 2,3-dihydroimidazo[2,1-a]isoquinoline [PDF]

open access: yesBeilstein Journal of Organic Chemistry
2-Arylimidazolines were annulated with cyclic diazo-1,3-dicarbonyl compounds under Rh(III)-catalysis for the first time. The developed general and efficient approach based on CH-activation allowed the efficient preparation of five novel types of ...
Ivan Lyutin   +3 more
doaj   +2 more sources

Diazocarbonyl and Related Compounds in the Synthesis of Azoles

open access: yesMolecules, 2021
Diazocarbonyl compounds have found numerous applications in many areas of chemistry. Among the most developed fields of diazo chemistry is the preparation of azoles from diazo compounds.
Anton Budeev   +3 more
doaj   +1 more source

Chitosan as a sustainable heterogeneous catalyst for the preparation of functionalized α-diazo carbonyl compounds

open access: yesTetrahedron Green Chem, 2023
The food industry generates vast amounts of waste and one of the most abundant is the biopolymer chitin, which is the main constituent of crustacean shells and insect exoskeletons.
Gabriela M. Diogo   +4 more
doaj   +1 more source

Kinetics of N2 Release from Diazo Compounds: A Combined Machine Learning-Density Functional Theory Study [PDF]

open access: yes, 2023
Diazo compounds are commonly employed as carbene precursors in carbene transfer reactions during a variety of functionalization procedures. Release of N2 gas from diazo compounds may lead to carbene formation, and the ease of this dissociation is highly ...
Kaveh, Farshadfar   +3 more
core   +2 more sources

Nucleophilicities of Cyclic α‐Diazo Carbonyl Compounds [PDF]

open access: yes, 2023
The kinetics of the reactions of cyclic α-diazo carbonyl compounds with electrophilic benzhydrylium ions were evaluated to determine the Mayr reactivity descriptors N (and sN) of the nucleophiles.
Jer‐Ray Hsu   +7 more
core   +1 more source

Multicomponent Reactions Involving Diazo Reagents: A 5-Year Update

open access: yesMolecules, 2021
This review summarizes recent developments in multicomponent reactions of diazo compounds. The role of diazo reagent and the type of interaction between components was analyzed to structure the discussion.
Olga Bakulina   +3 more
doaj   +1 more source

Stereoselective Bioreduction of α-diazo-β-keto Esters

open access: yesMolecules, 2020
Diazo compounds are versatile reagents in chemical synthesis and biology due to the tunable reactivity of the diazo functionality and its compatibility with living systems.
Sergio González-Granda   +3 more
doaj   +1 more source

O-methyltransferase-like enzyme catalyzed diazo installation in polyketide biosynthesis

open access: yesNature Communications, 2023
Diazo compounds are rare natural products possessing various biological activities. Kinamycin and lomaiviticin, two diazo natural products featured by the diazobenzofluorene core, exhibit exceptional potency as chemotherapeutic agents.
Yuchun Zhao   +14 more
doaj   +1 more source

Chemoselective carbene insertion into the N−H bonds of NH3·H2O

open access: yesNature Communications, 2022
Converting low-cost inorganic chemicals into value-added organic chemicals is a longstanding goal in chemistry. Here the authors describe a silver-catalysed chemoselective carbene N−H insertion reaction, providing access to primary amines from aqueous ...
Zhaohong Liu   +8 more
doaj   +1 more source

Copper-Catalyzed Insertion of Diazo Compounds into Vinyl Hypervalent Iodine Reagents to Generate Allylic Esters [PDF]

open access: yes, 2019
An unprecedented copper(I)-catalyzed vinylation of (donor)-acceptor diazo compounds with VinylBenziodoXolone reagents (VBX) as partners is reported. The transformation tolerates variation of both donor- and acceptor substituents on the diazo compounds ...
Guillaume, Pisella   +5 more
core   +1 more source

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