Results 31 to 40 of about 123,501 (158)

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

Insertion of Nitriles Into a Gold(III)/Carbene Bond: A Direct and Powerful Entry to Imino‐Substituted Carbenes

Angewandte Chemie, Volume 137, Issue 23, June 2, 2025.
Stable imino‐substituted Au(III) carbenes are easily and efficiently prepared by trapping the transient (N^C^C)Au←:CH(dmp)+ carbene with nitriles. The corresponding free species are readily generated and display dual carbene / nitrile‐ylide reactivities. The diazo decomposition, nitrile insertion, and carbene transfer can be combined in three‐component
Rui Wei, Nina Albouy, Sonia Mallet‐Ladeira, Karinne Miqueu, Didier Bourissou   +4 more
wiley   +2 more sources

2H-Pyrrole und Pyrrole aus 3-Phenyl-2H-azirinen

CHIMIA, 1976
Vinyl-phosphonium salts [2] and phenyl-vinyl-sulfone or divinylsulfone react with benzonitril-methylides a (which are photochemically generated from 3-phenyl-2H-azirines 1 and 2) to give, via the nonisolated intermediates of type b, 2H-pyrrole 4 and the
Ulrich Widmer, Nikolas Gakis, Bruno Arnet, Heinz Heimgartner, Hans Schmid   +4 more
doaj   +1 more source

Pyridonderivate aus 3-Amino-2H-azirinen und Cyclopropenonen

CHIMIA, 1978
Reaction of the 3-dimethylamino-2H-azirines 1a and 1b with diphenylcyclopropenone (2a) in ether or acetonitrile leads to the 2-dimethylamino-5,6-diphenyl-4(3H)-pyridones 3a and 3b in 70 and 80% yield, respectively. The structure of these 1:1-adducts has
Stanislav Chaloupka, Heinz Heimgartner
doaj   +1 more source

Recent Contributions of Organic Synthesis to Forensic Science

ChemPlusChem, Volume 91, Issue 2, February 2026.
Forensic science is a multidisciplinary field that plays a vital role in providing scientific evidence for criminal investigations. This review highlights advances and opportunities at the interface between organic synthesis and forensic science, with applications in drug identification, forensic toxicology, and latent fingerprint detection and ...
Gustavo dos Santos Martins, Mariana dos Santos Dupim, Rodrigo Garcia Agostinho, Fernanda Gadini Finelli   +3 more
wiley   +1 more source

Polymerization‐Induced Direct Photolithography of Quantum Dots

Macromolecular Rapid Communications, Volume 46, Issue 18, September 19, 2025.
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 ...
Taehyung Kim, Namyoung Gwak, Nuri Oh, Tae Ann Kim   +3 more
wiley   +1 more source

Manganese(I)‐Catalyzed Access to Enantioenriched Chiral Aziridine Phosphines

Angewandte Chemie, Volume 137, Issue 3, January 15, 2025.
A highly enantioselective hydrophosphination of 2H‐azirines is reported based on a newly discovered Mn(I) catalyst that plays an important role in both the reactivity and stereoselectivity of the process. Various valuable aziridine phosphines can now be accessed in high yields and enantiopurities.
Chuang Ni, Tizian‐Frank Ramspoth, Marta Castiñeira Reis, Syuzanna R. Harutyunyan   +3 more
wiley   +2 more sources

A Systematic Review of Synthetic and Anticancer and Antimicrobial Activity of Quinazoline/Quinazolin‐4‐one Analogues

ChemistryOpen, Volume 14, Issue 7, July 2025.
Quinazoline represents an important class of heterocycles with diverse medicinal and pharmacological significance. This review systematically examines scholarly efforts toward understanding different synthetic pathways emphasizing the role of metal and non‐metal catalysts including some miscellaneous reagents employed in the synthesis of quinazoline ...
Neha Manhas, Gobind Kumar, Sanjeev Dhawan, Talent Makhanya, Parvesh Singh   +4 more
wiley   +1 more source

Mechanochemical Conditions for Intramolecular N−O Couplings via Rhodium Nitrenoids Generated from N‐Acyl Sulfonimidamides

Angewandte Chemie, Volume 136, Issue 50, December 9, 2024.
Mechanochemical intramolecular N−O couplings of N‐acyl sulfonimidamides under rhodium catalysis are presented. The solvent‐free method proceeds via rhodium nitrenoids and produces unprecedented 1,3,2,4‐oxathiadiazole 3‐oxides in a short reaction time with up to 98 % yield.
Shulei Pan, Peng Wu, Dimitra Bampi, Jas S. Ward, Kari Rissanen, Carsten Bolm   +5 more
wiley   +2 more sources

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