Results 11 to 20 of about 317 (127)

Synthesis and Application of Bioactive N-Functionalized Aziridines. [PDF]

Angew Chem Int Ed Engl
This review discusses modern synthetic methods for the preparation of aziridine‐containing small molecules, including biocatalytic, electrocatalytic, and photocatalytic strategies. We highlight the compatibility of various synthetic methods with control of the exocyclic N‐substituent.
Tan H, Samanta S, Qiu N, Adibekian A, Powers DC.   +4 more
europepmc   +3 more sources

Synthesis of 2-(Trifluoromethyl)Azetidines by Strain-Release Reactions of 2-(Trifluoromethyl)-1-Azabicyclo[1.1.0]Butanes. [PDF]

Chemistry
2‐(Trifluoromethyl)‐1‐azabicyclo[1.1.0]butanes, available by diastereoselective cyclopropanation of 2‐(trifluoromethyl)‐2H‐azirines, can be successfully involved in strain‐release ring‐opening processes, as illustrated by their reaction with benzyl chloroformate, trifluoroacetic anhydride or palladium‐catalyzed hydrogenolysis.
Scuiller A, Dupas A, Lefebvre G, Bouriche N, Chédotal H, Guillamot G, Cossy J, Meyer C.   +7 more
europepmc   +2 more sources

Polymerization-Induced Direct Photolithography of Quantum Dots. [PDF]

Macromol Rapid Commun
We present a comprehensive overview of photochemical polymerization strategies for direct lithographic patterning of colloidal quantum dots (QDs). Reaction mechanisms are categorized by functional group type, and their application is discussed in terms of pattern fidelity, photostability, and environmental robustness, highlighting the potential of ...
Kim T, Gwak N, Oh N, Kim TA.
europepmc   +2 more sources

Synthetic Strategies to Access Fluorinated Azoles. [PDF]

European J Org Chem
This review highlights recent synthetic strategies for introducing fluorine groups (mono‐, di‐, and trifluoromethylation) into 11 major azole classes, identifying research gaps to inform future innovations in materials science, medicinal chemistry, and biomedical research.
El-Gaber MKA, Djugovski M, Huang TY, Adhikari S, Roy S.   +4 more
europepmc   +2 more sources

Addition and Cycloaddition Reactions of Phosphinyl- and Phosphonyl-2H-Azirines, Nitrosoalkenes and Azoalkenes

Molecules, 2009
An overview of the use of 2H-azirines, conjugated nitrosoalkenes and conjugated azoalkenes bearing phosphorus substituents in addition and cycloaddition reactions is presented, focused on strategies for the synthesis of aminophosphonate and ...
Américo Lemos
doaj   +1 more source

Synthesis of New 2-Halo-2-(1H-tetrazol-5-yl)-2H-azirines via a Non-Classical Wittig Reaction

Molecules, 2015
The synthesis and reactivity of tetrazol-5-yl-phosphorus ylides towards N-halosuccinimide/TMSN3 reagent systems was explored, opening the way to new haloazidoalkenes bearing a tetrazol-5-yl substituent.
Ana L. Cardoso, Carmo Sousa, Marta S. C. Henriques, José A. Paixão, Teresa M. V. D. Pinho e Melo   +4 more
doaj   +1 more source

Investigation on the reactivity of α-azidochalcones with carboxylic acids: Formation of α-amido-1,3-diketones and highly substituted 2-(trifluoromethyl)oxazoles

Beilstein Journal of Organic Chemistry, 2015
The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates.
Kandasamy Rajaguru, Arumugam Mariappan, Rajendran Suresh, Periasamy Manivannan, Shanmugam Muthusubramanian   +4 more
doaj   +1 more source

2-Oxo-4H-imidazolium-1-acetamidate, neue stabilisierte Dipole aus Aminoazirinen und NH-aciden Heterocyclen

CHIMIA, 1985
3-Dimethylamino-2,2-dimethyl-2H-azirine (1) and 5-trifluoromethyl-1,3,4- oxadiazol-2(3H)-on (9) in 2-propanol react already at room temperature to give the dipolar compound 10 in reasonable yield (Scheme 4).
Roland Prewo, Jost H. Bieri, Heinz Heimgartner   +2 more
doaj   +1 more source

Neuere Methoden zur Ringerweiterung organischer Verbindungen

CHIMIA, 1980
The actual interest in the construction of cyclic compounds via ring expansion reactions is demonstrated in the first chapter by means of typical examples.
Heinz Heimgartner
doaj   +1 more source

Kristallstruktur eines 2-Dimethylamino-3,3-dimethyl-4(3H)-pyridons

CHIMIA, 1982
3-Dimethylamino-2,2-dimethyl-2H-azirine (1) reacts with alkyl phenyl substituted cyclopropenones 2 in benzene at 130 °C to give a mixture of the two isomeric 4(3H)-pyridones 3 and 4, resulting from a nucleophilic attack at C(2) and C(1) of the ...
Jost H. Bieri, Roland Prewo, Heinz Heimgartner   +2 more
doaj   +1 more source