Results 51 to 60 of about 517 (172)
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 +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 +3 more
wiley +1 more source
, 2022 N-Polyheterocycles are rapidly accessed by N-heterocyclic carbene (NHC) catalysis through regioselective sequential radical addition/cyclization in the absence of any metals or oxidants.
Qijing Zhang (293842) +3 more
core +1 more source
Cationic Gold(I)-Catalyzed Cascade Bicyclizations for Divergent Synthesis of (Spiro)polyheterocycles
, 2018 We herein report an expeditious synthetic strategy to access diverse (spiro)polyheterocycles from easily available starting materials in two operational steps including an Ugi four-component reaction and a cationic gold(I)-catalyzed cascade ...
Luc Van Meervelt (1501579) +4 more
core +2 more sources
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 +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 +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
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 +4 more
wiley +1 more source
Novel three-component domino processes to polyheterocycles are developed. Reaction of an allylamine, an aldehyde and an alpha -isocyanoacetamide in methanol at room temp. provides an efficient access to an oxa-bridged tricycle as a single diastereoisomer.
Gamez-Montano, Rocio +3 more
core +1 more source
Palladium(II) Catalyzed C–H Functionalization Cascades for the Diastereoselective Synthesis of Polyheterocycles [PDF]
, 2016 C−H activation offers huge potential in the generation of complex structures from simple starting materials. Herein we report the development of a highly diastereoselective palladium(II) catalyzed C−H functionalization cascade to produce novel ...
Watt, Michael +3 more
core +1 more source