Results 1 to 10 of about 1,044 (124)

Selective C‐7 Functionalization of Phenanthridines by Microwave‐Assisted Claisen Rearrangements of 8‐Allyloxyphenanthridines [PDF]

open access: yesChemistryOpen, 2023
Carbon‐carbon bond formation in the phenanthridine 7‐position was achieved by microwave‐assisted Claisen rearrangement of 8‐allyloxyphenanthridines. The reactions took place with excellent regioselectivity and high chemical yields.
Mathias Ryslett Lepsøe   +2 more
doaj   +2 more sources

Synthesis of phenanthridines via a novel photochemically-mediated cyclization and application to the synthesis of triphaeridine [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2021
Readily synthesized biphenyl-2-carbaldehyde O-acetyl oximes were exposed to UV radiation affording phenanthridines. The scope and limitations of this novel reaction were explored.
Songeziwe Ntsimango   +3 more
doaj   +2 more sources

Direct Photoexcitation of Benzothiazolines: Acyl Radical Generation and Application to Access Heterocycles [PDF]

open access: yesMolecules, 2021
An acyl radical generation and functionalization strategy through direct photoexcitation of benzothiazolines has been developed. The formed acyl radical species can either be trapped by quinoxalin-2-ones to realize their C(3)-H functionalization or ...
Xiang-Kui He   +4 more
doaj   +2 more sources

Pentacyclic aromatic heterocycles from Pd-catalyzed annulation of 1,5-diaryl-1,2,3-triazoles [PDF]

open access: yesBeilstein Journal of Organic Chemistry
A series of pentacyclic aromatic heterocycles representing functionalized phenanthridines, naphthyridines, and phenanthrolines were prepared via Pd-catalyzed annulation of 1,5-diaryl-1,2,3-triazoles.
Kaylen D. Lathrum   +3 more
doaj   +2 more sources

Synthesis, Bacteriostatic and Anticancer Activity of Novel Phenanthridines Structurally Similar to Benzo[c]phenanthridine Alkaloids [PDF]

open access: yesMolecules, 2018
In this study, we report the synthesis, antibacterial and anticancer evaluation of 38 novel phenanthridines that were designed as analogs of the benzo[c]phenanthridine alkaloids. The prepared phenanthridines differ from the benzo[c]phenanthridines in the
Pavel Lasák   +3 more
doaj   +4 more sources

Photocatalyzed syntheses of phenanthrenes and their aza-analogues. A review [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2020
Phenanthrenes and their aza-analogues have important applications in materials science and in medicine. Aim of this review is to collect recent reports describing their synthesis, which make use of radical cyclizations promoted by a visible light ...
Alessandra Del Tito   +4 more
doaj   +2 more sources

Microwave assisted synthesis of phenanthridine derivatives via Suzuki coupling and condensation

open access: yesResults in Chemistry, 2021
One-pot synthesis of phenanthridine derivatives using appropriately substituted aromatic ortho-bromo N-tosylhydrazones and 2′-aminobenzeneboronic acid pinacol esters is described.
Satheesh Kumar Dende   +3 more
doaj   +1 more source

Rhodium-Catalyzed Oxidative Annulation of 2- or 7-Arylindoles with Alkenes/Alkynes Using Molecular Oxygen as the Sole Oxidant Enabled by Quaternary Ammonium Salt

open access: yesMolecules, 2021
Developing an efficient catalytic system using molecular oxygen as the oxidant for rhodium-catalyzed cross-dehydrogenative coupling remains highly desirable.
Weihui Zhuang   +3 more
doaj   +1 more source

Ueber das Phenanthridin [PDF]

open access: yesJustus Liebigs Annalen der Chemie, 1891
von H.
Pictet, Amé, Ankersmit, H. Jan
openaire   +3 more sources

Isometamidium chloride and homidium chloride fail to cure mice infected with Ethiopian Trypanosoma evansi type A and B. [PDF]

open access: yesPLoS Neglected Tropical Diseases, 2018
BACKGROUND:Trypanosoma evansi is mechanically transmitted by biting flies and affects camels, equines, and other domestic and wild animals in which it causes a disease called surra.
Gebrekrustos Mekonnen   +7 more
doaj   +1 more source

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