Results 41 to 50 of about 10,732 (222)

Auf dem Weg zu chromoselektiven Transformationen in biologischen Systemen: Perspektiven und Herausforderungen

Angewandte Chemie, EarlyView.
Die Kontrolle biologischer Systeme mit organischen Chromophoren hat sich zu einer vielversprechenden Strategie entwickelt und findet Anwendung von der chemischen Biologie bis hin zur Medizin. Die Komplexität von In‐vivo‐Systemen lässt sich jedoch nicht mit nur einer einzigen Lichtwellenlänge adäquat abbilden.
Nadja A. Simeth
wiley   +1 more source

One-pot practical method for synthesis of functionalized 4H-chromen-5-one derivatives under catalyst and solvent-free conditions

, 2018
A facile and practical method was described for the synthesis of 4H-chromen-5-ones under catalyst- and solvent-free conditions by one-pot stirring of starting materials at 110 °C.
Biswas Saigal (5859377), Sarfaraz Khan (4966285), M. Musawwer Khan (1843240), Subash C. Sahoo (5859383), Sumbulunnisan Shareef (5859380)   +4 more
core   +1 more source

Highly Potent Fluorogenic Ligands for Triplex DNA: 5‐Substituted 2‐(Naphthalen‐2‐yl)‐4H‐Chromen‐4‐Ones

Chemistry – A European Journal, EarlyView.
5‐Substituted 2‐(naphthalen‐2‐yl)‐4H‐chromen‐4‐ones are reported as a novel class of highly potent and selective triplex DNA ligands. These ligands induce triplex formation at submicromolar concentrations and inhibit enzymatic activity via ligand‐mediated triplex formation.
Nghia Tran, Landy Gu, Krege M. Christison, Kalee Thao, Liang Xue   +4 more
wiley   +1 more source

Organic–inorganic hybrid material, dichloro N,N'-(1,2-phenylene)bis(2-aminobenzamide) cobalt(II)@Al-SBA-15: an environment friendly catalyst for the synthesis of 3-benzoxazol-2-yl-chromen-2-ones

, 2019
A new organic-inorganic hybrid material, CoCl2N,N'-(1,2-phenylene)bis(2-aminobenzamide)@Al-SBA-15, was synthesized by modification of Al-SBA-15 with (3-chloropropyl) trimethoxysilane (CPTMS), then the ligand was covalently attached to CPTMS@Al-SBA-15 and
Javad Safaei Ghomi (6531656), Zeinab Akbarzadeh (6531659), Atefeh Bakhtiari (6413744)   +2 more
core   +1 more source

Synthesis, characterization and crystal structure of methyl 2-(2-oxo-2H-chromen-4-ylamino)benzoate

Acta Crystallographica Section E: Crystallographic Communications, 2023
Methyl 2-(2-oxo-2H-chromen-4-ylamino)benzoate, C17H13NO4 (1), was prepared by condensation between 4-hydroxycoumarin and methyl 2-aminobenzoate. It crystallizes in the orthorhombic space group Pca21 at 300 K. The molecule of compound 1 consists of the 2H-
Henrique V. P. Hollauer, Rachel C. Vilas Novas, Guilherme P. Guedes, Camilla D. Buarque, Lívia B. L. Escobar   +4 more
doaj   +1 more source

Photosensitizing Au(I) Catalysis With Coumarins

Chemistry – A European Journal, EarlyView.
A Au(I) complex with a tethered coumarin fragment was synthesized and characterized by UV‐vis and emission spectroscopy. Its ability to facilitate photo‐driven cross‐coupling reactions through single‐electron and energy transfer events was evaluated. ABSTRACT Gold catalysis shows versatility in a wide range of challenging transformations, wherein light‐
Liliana Capulín Flores, Jacob J. van der Wal, Johannes E. M. N. Klein   +2 more
wiley   +1 more source

Antioxidant activity of some N-heterocycles derived from 2-(1-(2-oxo-2H-chromen-3-yl)ethylidene) hydrazinecarbothioamide

, 2019
Efficient and convenient synthesis of coumarin derivatives was accomplished via reactions of 2-(1-(2-oxo-2H-chromen-3-yl)ethylidene)hydrazinecarbothioamide with some carbon electrophiles, e.g.
Eman A. E. El-Helw (7220507), Hanan A. Sallam (7220510), Amna S. Elgubbi (7220513)   +2 more
core   +1 more source

Evaluation of DNA/Chromosome Integrity and Cell Death in Human Metabolically Noncompetent and Competent Cells Exposed to N′‐(3,5‐Difluorobenzylidene)Pyridine‐4‐Carbohydrazide

Journal of Applied Toxicology, EarlyView.
ABSTRACT The N‐acylhydrazone scaffold is recognized as a privileged structure for the design of bioactive substances with increasing applications in medicinal chemistry research. Ensuring the safety of newly developed molecules is a critical step for both human health and environmental protection. Accordingly, this study aimed to evaluate the cytotoxic
Larissa Ribeiro Canuto Santos, Jéssica Natalia Barbosa de Almeida, Camila Cavalleiro Frias, Wanda Pereira Almeida, Edson Luis Maistro   +4 more
wiley   +1 more source

-chromen-2-one

, 2023
The title compound, C24H30O4, consists of two trans-fused cyclohexane rings attached to a chromen-2-one moiety through an oxymethylene bridge. The cyclohexane rings adopt half-chair and chair conformations. In the crystal, molecules are linked by C-H...O
Ali N. Khalilov, AKKURT, MEHMET, Khrustalev, Victor N., Aleskerova, Adila N., Bhattarai, Ajaya, İbrahim G. Mamedov, Mamedov, İbrahim G., Ajaya Bhattarai, Karimli, Elvin G., Adila N. Aleskerova, Elvin G. Karimli, Mehmet Akkurt, Victor N. Khrustalev, Khalilov, Ali N.   +13 more
core   +1 more source

Synthesis, Structure and Cytotoxic Properties of Copper(II) Complexes of 2-Iminocoumarins Bearing a 1,3,5-Triazine or Benzoxazole/Benzothiazole Moiety

Molecules, 2022
A series of copper(II) complexes of 2-imino-2H-chromen-3-yl-1,3,5-triazines 2a-h, 3-(benzoxazol-2-yl)-2H-chromen-2-imines 4a-b, and 3-(benzothiazol-2-yl)-2H-chromen-2-imines 6a-c were obtained by reacting of appropriate 2-iminocoumarin ligands L1a-h, L3a-
Anna Makowska, Franciszek Sączewski, Patrick J. Bednarski, Maria Gdaniec, Łukasz Balewski, Magdalena Warmbier, Anita Kornicka   +6 more
doaj   +1 more source