Results 31 to 40 of about 1,676 (183)

A new regiospecific method for the synthesis of substituted phenanthridines and benzo[j]phenanthridines via aromatic annelation of 1-N-benzenesulfonyl-3-[bis(methylthio)methylene]-1,2,3,4-tetrahydroquinoline-4-one

open access: yes, 1998
A new efficient method for the synthesis of substituted phenanthridines, benzo[j]phenanthridines and naphtho[2,1-j]phenanthridines is described. The method involves reaction of α-oxoketene dithioacetal 2 with allyl (3a), methallyl (3b), benzyl (11a ...
Suresh, J. R.   +3 more
core   +1 more source

Synthesis of Quinolino[4,3‐ j]phenanthridines and their Photophysical Characterization [PDF]

open access: yes
Quinolino[4,3-j]phenanthridines were synthesized from para-terphenyl-2,2′′-diamines, which were obtained by cross-coupling reactions. The diamines were converted into amides and ortho-cyclized to quinolino[4,3-j]phenanthridines using Morgan-Walls ...
Schumann, Felix R., Podlech, Joachim
core   +1 more source

Nanoparticle‐Mediated Therapy for Glioma: Advances and Prospects

open access: yesMedComm – Oncology, Volume 5, Issue 3, September 2026.
Various nanocarriers, including liposomes, dendrimers, exosomes and gold nanoparticles, are designed to penetrate the blood‐brain barrier and deliver chemotherapy, radiotherapy, immunotherapy, gene therapy, phototherapy, magnetic hyperthermia and sonodynamic therapy for glioma.
Wenqian Jiang   +5 more
wiley   +1 more source

Studies on the electrochemical reactions of 1-amino phosphonates

open access: yesElectrochemistry Communications
Electrochemical direct conversion of 1-aminoalkylphosphonates into novel heteroaromatic compounds has been studied and described. Cyclicvoltametry analysis showed that 1-aminoalkylphosphonate was oxidized in the anode, followed by removing the phosphoryl
Babak Kaboudin   +3 more
doaj   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

6‑Phosphorylated Phenanthridines from 2‑Isocyanobiphenyls via Radical C–P and C–C Bond Formation

open access: yes, 2016
A C–P bond and a C–C bond are formed in the synthesis of 6-phosphorylated phenanthridines starting with readily prepared 2-isocyanobiphenyls and commercially available P-radical precursors.
Constantin Gabriel Daniliuc (1863796)   +2 more
core   +2 more sources

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

open access: yesChemistry – A European Journal, Volume 32, Issue 28, 25 July 2026.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Preparation of Substituted Phenanthridines from the Coupling of Aryldiazonium Salts with Nitriles: A Metal Free Approach

open access: yes, 2015
A transition metal free approach for the synthesis of substituted phenanthridines from the coupling reaction of aryldiazonium tetrafluoroborates with nitriles has been developed.
Mani Ramanathan (1470898)   +1 more
core   +1 more source

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

open access: yesChemistry – A European Journal, Volume 32, Issue 26, 11 July 2026.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis   +2 more
wiley   +1 more source

Pirrolo [1,2-f] phenanthridines and related non-rigid analogues as antiviral agents

open access: yes, 2002
The pyrrolo[1,2-f ]phenanthridines 8–22 and the corresponding non-rigid analogues 23–41 were synthesised and their ability to inhibit the replication of HIV-1 was tested.
SANNA L   +10 more
core   +1 more source

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