Results 41 to 50 of about 169 (141)

2‐Aminoindoles and 2‐Iminoindolines as Viable Precursors of Indole‐Fused Nitrogenated Polyheterocycles

Advanced Synthesis &Catalysis, Volume 367, Issue 6, March 18, 2025.
Abstract The synthesis of architecturally complex polyheterocyclic structures embedding the indole ring represents a growing field of interest. Carbolines and their partially dehydro derivatives, pyrazinoindoles, indoloindoles, azepinoindoles and other medium‐sized derivatives are only some examples of indole‐containing polycyclic compounds featured by
Alessandro Palmieri, Marino Petrini
wiley   +1 more source

Photoassisted access to complex polyheterocycles containing a β-lactam moiety [PDF]

Journal of Photochemistry and Photobiology A: Chemistry, 2016
Intramolecular cycloadditions of aza-o-xylylenes generated via excited state intramolecular proton transfer (ESIPT) to furanacetic acid-based unsaturated pendants was shown to overcome the unfavorable energetics of the azetidinone ring formation, offering rapid access to β-lactams as primary photoproducts.
Weston J. Umstead, Olga A. Mukhina, Andrei G. Kutateladze   +2 more
openaire   +2 more sources

Molybdenum‐Catalyzed Direct Synthesis of Pyrroles from Nitroarenes with Glycols as Reductants

Advanced Synthesis &Catalysis, Volume 367, Issue 4, February 18, 2025.
Abstract A molybdenum‐catalyzed synthesis of N‐(hetero)aryl pyrroles directly from inexpensive and commonly available (hetero)nitroarenes via reduction with pinacol and annulation with 1,4‐dicarbonyls or cyclobutane‐1,2‐diols has been described. The process does not require an inert atmosphere and tolerates the presence of air and water. This non‐noble
Sara Gómez‐Gil, Samuel Suárez‐Pantiga, María R. Pedrosa, Roberto Sanz   +3 more
wiley   +1 more source

Enantioselective Cascade Reactions of Aminocatalytic Dienamines and Trienamines Initiated by a Cycloaddition Reaction

Chemistry – A European Journal, Volume 31, Issue 1, January 2, 2025.
This review outlines and showcases how aminocatalytic dienamines and trienamines can be used in stereoselective cascade reactions, that are initiated by a cycloaddition reaction to rapidly access complex chiral molecules. We aspire that the chemical community can use this review to design new cascade reaction or use current methodologies in complex ...
Jonas Faghtmann, Signe Sofie Pladsbjerg Andresen, Anne Rask Østergaard, Karl Anker Jørgensen   +3 more
wiley   +1 more source

Catalytic Enantioselective Functionalization of Maleimides: An Update

Chinese Journal of Chemistry, Volume 42, Issue 24, Page 3605-3622, 15 December 2024.
Maleimides are multisite‐reactive scaffolds that have stimulated a growing interest in the field of synthetic organic chemistry. The present review covers the utilization of maleimides as electrophilic partners and pro‐nucleophilic partners in metal‐catalyzed or organocatalyzed functionalizations with the control of either central and/or axial ...
Muriel Amatore, Damien Bonne, Thierry Constantieux, Jean Rodriguez   +3 more
wiley   +1 more source

The Concept of Polyheterocyclic Strategy

, 1997
This strategy is a synthetic procedure for the synthesis of molecules with multiple linked heterocyclic rings. This is important in fields such as medicine and materials science due to the diverse biological activities of these molecules, including antitumor and antimicrobial properties, as well as other valid applications.
openaire   +2 more sources

1,2‐Diaza‐1,3‐Dienes as a Multifaceted Synthons for the Synthesis of Heterocycles: A Fifteen‐Years Update

European Journal of Organic Chemistry, Volume 27, Issue 44, November 25, 2024.
1,2‐Diaza‐1,3‐butadienes, also called azoalkenes, have received considerable attention as key synthons for constructing various heterocyclic scaffolds. This minireview summarizes the contribution of our group in this field over the period from 2009 to the present, focusing on the role of the azoene building block in forming the heterocyclic structures.
Lucia De Crescentini, Giacomo Mari, Stefania Santeusanio, Gianfranco Favi, Fabio Mantellini   +4 more
wiley   +1 more source

Thermal and Photoinduced Radical Cascade Annulation using Aryl Isonitriles: An Approach to Quinoline‐Derived Benzophosphole Oxides

Angewandte Chemie International Edition, Volume 63, Issue 30, July 22, 2024.
The synthesis of quinoline‐based benzophosphole oxides from ortho‐alkynylated aromatic phosphine oxides and aryl isonitriles is presented. These π‐extended benzophosphole oxides exhibit interesting photophysical and electrochemical properties. Abstract Herein, we present a radical cascade addition cyclization sequence to access quinoline‐based ...
Shyam Kumar Banjare, Lena Lezius, Elena S. Horst, Dirk Leifert, Constantin G. Daniliuc, Fatmah A. Alasmary, Armido Studer   +6 more
wiley   +1 more source

Polyheterocyclic Systems Incorporating Pyrazole, Thiophene, Thiazole, and Thiadiazole Moieties.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Kamal M. Dawood, Eman A. Ragab, Ahmad M. Farag   +2 more
openaire   +1 more source

Molybdenum‐Catalyzed One‐Pot Multi‐Step Synthesis of N‐Polyheterocycles from Nitroarenes and Glycols

European Journal of Organic Chemistry, Volume 27, Issue 18, May 13, 2024.
A tandem process for the synthesis of N‐polyheterocycles from easily available nitroarenes catalyzed by a dioxomolybdenum(VI) complex is described, where the byproduct generated in the first step is incorporated into the final structure. A broad variety of nitrogenated compounds are synthesized in overall good yields in a one‐pot manner.
Sara Gómez‐Gil, Nuria Cases, Raquel Hernández‐Ruiz, Rubén Rubio‐Presa, Samuel Suárez‐Pantiga, María R. Pedrosa, Roberto Sanz   +6 more
wiley   +1 more source