Results 161 to 170 of about 19,176 (260)

Strategies for Enantioselective, Cascade, Valorizing, and Expanded Heterocyclic Piancatelli Rearrangements. [PDF]

ACS Org Inorg Au
K ATG, Kizirian M, Picazo E.
europepmc   +1 more source

Overview of Photochemical Reactions for the Synthesis of Aza and Oxa‐Spirocyclic Compounds Under Visible Light Irradiation

Chemistry &Biodiversity, Volume 23, Issue 9, September 2026.
This review presents the visible‐light‐mediated photochemical reaction for the synthesis of aza, oxa, and aza–oxa spirocyclic compounds via photoinduced electron transfer (PET), hydrogen atom transfer (HAT), single‐electron transfer (SET), or energy transfer (EnT) pathways.
Annu Bhardwaj, Shivangi Jaiswal, Khushboo Bhardwaj, Swapnil Sharma, Jaya Dwivedi   +4 more
wiley   +1 more source

Iridium‐Catalyzed Ionic Hydrogenation of Multi‐Aza Heterocycles

Angewandte Chemie, Volume 138, Issue 35, 24 August 2026.
Saturated nitrogen‐containing heterocycles are ubiquitous in bioactive molecules and are thus attractive synthetic targets. A readily accessible cyclometalated iridium(III) complex reduces 14 different aromatic aza heterocycles to (partially)saturated multi aza‐heterocycles enlarging accessible chemical space while displaying high tolerance toward ...
Arthur Despois, Nicolai Cramer
wiley   +2 more sources

Mechanochemical Diastereoselective Substrate-Directed Synthesis of Pyrrole-Isoxazolidines via 1,3-Dipolar Cycloaddition of Maleimides with Nitrones. [PDF]

J Org Chem
de Jesus IS, Lédo AFDC, Ferrer A, A Bueno M, Cunha S.   +4 more
europepmc   +1 more source

Metal‐Free Decarboxylative Allylation of N‐Protected Amino Acids and Carboxylic Acids via Thioxanthone Photocatalysis

ChemCatChem, Volume 18, Issue 17, 14 September 2026.
A mild, metal‐free photochemical decarboxylative allylic alkylation protocol using inexpensive thioxanthone under blue LEDs couples diverse carboxylic and N‐protected amino acids with Morita–Baylis–Hillman derivatives, offering broad substrate scope and a mechanism supported by radical‐trapping experiments.
Areti N. Karamitrou, Olga G. Mountanea, Manos V. G. Lantzanakis, Christoforos G. Kokotos   +3 more
wiley   +1 more source

Excitation of acyclic trisubstituted alkenes via triplet energy transfer for diastereo- and enantioselective [2 + 2] photocycloaddition. [PDF]

Nat Commun
Long J, Wen J, Mo Z, Chen X, Wang T, Fang X.   +5 more
europepmc   +1 more source

N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, Volume 32, Issue 33, 1 September 2026.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

Fragmentation of Vancoresmycin Reveals a Strong Dependence on Global Molecular Architecture for Antibacterial Activity. [PDF]

ChemMedChem
Schönenbroicher M, Heppner F, Seul M, Morgenschweis S, Abdelrahman AA, Fahr E, Holstein N, Müller A, Menche D.   +8 more
europepmc   +1 more source

Stereodivergent Synthesis of C5‐α‐Substituted Linezolid Derivatives From D‐Mannitol and Structure–Antibacterial Activity Evaluation

Chirality, Volume 38, Issue 9, September 2026.
A stereodivergent route from D‐mannitol enables access to enantiopure C5‐α‐substituted linezolid analogues with full configurational control. Biological evaluation reveals that α‐substitution abolishes antibacterial activity irrespective of stereochemistry, establishing a strict steric limitation at C5 and highlighting the dominant role of substituent ...
José A. Gálvez, Laura Sanz‐Asensio, Ramón Badorrey, Jesús Gonzalo‐Asensio   +3 more
wiley   +1 more source

Phosphine-Catalyzed Unsymmetric [2 + 2] Annulation of Allenyl Phosphonates for Highly Substituted Cyclobutenes. [PDF]

Angew Chem Int Ed Engl
Sun SH, Yang SN, Liu H, Ding ZY, Julaiti Y, Hu XP, Chen QA.   +6 more
europepmc   +1 more source