Results 61 to 70 of about 4,025 (222)

PYRIDAZINE AND ITS RELATED COMPOUNDS, SYNTHESIS OF SOME NOVEL CONDENSED PYRIDAZINES [PDF]

open access: yesBulletin of Faculty of Science, Zagazig University, 2017
A series of pyridazino[3,4-d][1,3]oxazin-5-one derivatives were designed and synthesized through a versatile method. Reaction of chloro-ester 1 with sodium azide has afforded azido-ester 2 which reacted with triphenylphosphine to produce compound 3; amino-ester 4 was formed upon treatment of compound 3 with acetic acid 80%; this amino-ester 4 was then ...
Ali Deeb   +3 more
openaire   +1 more source

The continuing significance of chiral agrochemicals

open access: yesPest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Microwave-Assisted Synthesis of 3,6-Di(pyridin-2-yl)pyridazines: Unexpected Ketone and Aldehyde Cycloadditions

open access: yes, 2006
3,6-Di(pyridin-2-yl)pyridazines are an interesting class of compds. because of their metal-coordinating ability resulting in the self-assembly into [2*2] gridlike metal complexes with copper(I) or silver(I) ions.
Schubert, U.S.   +2 more
core   +1 more source

Turning Electrode Orientation into a Design Parameter: Gravity‐Driven Convection for Coupling Electrochemical and Enzymatic Reactions

open access: yesChemElectroChem, Volume 13, Issue 11, 3 June 2026.
Electrochemically induced density gradients are harnessed to drive gravity‐dependent convection at partially fouled electrodes. By controlling electrode orientation and surface heterogeneity, mass transport is enhanced without external stirring. This enables coupling of electrochemical reactions with enzyme catalysis on insulating domains, exemplified ...
Wathsala Prasadini Kapuralage   +3 more
wiley   +1 more source

Pyridazines. XI. Some Reactions of 1,2,5-Thiadiazolo( 3,4-d) pyridazines

open access: yes, 1971
The synthesis of several substituted 1,2,5-thiadiazolo-(3,4-d)- pyridazines is described. In addition, two new tricyclic systems were obtained and some reactions with ring opening of the fused thiadiazolo ring are ...
Stanovnik, B.   +5 more
core  

Synthesis, spectral properties, and pesticidal activity of 4-amino(alkylamino, dialkylamino)-5-chloro-2-substituted-3-oxo-2H-pyridazines and 5-amino(alkylamino, dialkylamino)-4-chloro-2-substituted-3-oxo-2H-pyridazines

open access: yes, 1985
4-Amino(alkylamino)-5-chloro-2-substituted-3-oxo-2H-pyridazines and 5-amino(alkylamino, dialkylamino)-4-chloro-2-substituted-3-oxo-2H-pyridazines have been prepared by nucleophilic substitution reactions of 4,5-dichloro-2-substituted-3-oxo-2H-pyridazines
Václav Konečný   +2 more
core   +1 more source

Pyridazin (o‐Pyrazin) [PDF]

open access: yesBerichte der deutschen chemischen Gesellschaft, 1895
n ...
openaire   +2 more sources

Airborne 1O2 Delivery via a Superhydrophobic Dressing as a Pathway to Next‐Generation Wound Therapies, an In Vivo Murine Burn Model Study

open access: yesAdvanced Healthcare Materials, Volume 15, Issue 21, 5 June 2026.
Schematic illustration of the SH bandage placed on an infected burn wound and its role in wound healing. A superhydrophobic PDMS membrane coated with the PS verteporfin is placed over the wound area and illuminated with a red laser at 690 nm, generating airborne 1O2 above the tissue.
Fernanda Viana Cabral   +8 more
wiley   +1 more source

Pyridazines. LXXV. Some Quaternary and Mesoionic s-Triazolo( 4,3-b)pyridazines

open access: yes, 1975
Quaternization of some s-triazolo(4,3-b)pyridazines, formation of a mesoionic derivative and some transformations of these compounds are ...
Stanovnik, B.   +5 more
core  

A short and straightforward approach towards 6-amino and 6-aminoalkyl thiazolo[4,5-c]pyridazines

open access: yes, 2013
A facile and efficient synthesis of 6-amino and 6-aminoalkyl thiazolo[4,5-c]pyridazines is reported. The key step for the construction of this novel bicyclic scaffold was the reaction between 3-amino-4-bromopyridazine derivatives and alkylisothiocyanates.
Herdewijn, Piet   +3 more
core   +1 more source

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