scholarly journals Synthesis of heterocyclic ring (1,2,4-triazole) as polystyrene photo stabilizer

2021 ◽  
Vol 9 (2) ◽  
pp. 051-057
Author(s):  
Shahad Muhammad ◽  
Ahmed Ahmed
Keyword(s):  
Heterocyclic Compounds ◽  
Uv Light ◽  
Alkyl Halide ◽  
Benzyl Bromide ◽  
Triazole Ring ◽  
Heterocyclic Ring ◽  
Uv Absorber ◽  
Schiff Base Compound ◽  
Instrumental Methods ◽  
Base Compound

New heterocyclic compounds contain triazole ring (play very important role in photostabilization as UV absorber) synthesized by reaction between the di Schiff base (compound 3) with aromatic alkyl halide (Benzyl bromide) and shows there activity as photostabilizer for polystyrene through exposure to the UV-Light (300 hours). Finally Infrared spectroscopy, 1H-NMR, 13C-NMR and instrumental methods were used to characterize products and their structures.

scholarly journals Synthesis of Novel N-Heterocyclic Compounds Containing 1,2,3-Triazole Ring System via Domino, “Click” and RDA Reactions

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 772 ◽  
Author(s):  
Márta Palkó ◽  
Mohamed El Haimer ◽  
Zsanett Kormányos ◽  
Ferenc Fülöp
Keyword(s):  
Heterocyclic Compounds ◽  
Click Reaction ◽  
Triazole Ring ◽  
Heterocyclic Ring ◽  
Ring System ◽  
Diels Alder ◽  
Ring Closure ◽  
Synthetic Route ◽  
13C Nuclear Magnetic Resonance ◽  
Nmr Methods

An uncomplicated, high-yielding synthetic route has been developed to constitute complicated heterocycles, applying domino, click and retro-Diels–Alder (RDA) reaction sequences. Starting from 2-aminocarboxamides, a new set of isoindolo[2,1-a]quinazolinones was synthesized with domino ring closure. A click reaction was performed to create the 1,2,3-triazole heterocyclic ring, followed by an RDA reaction resulting in dihydropyrimido[2,1-a]isoindole-2,6-diones. The absolute configuration, concluded by the norbornene structure that served as a chiral source, remained constant throughout the transformations. The structure of the synthesized compounds was examined by 1H and 13C Nuclear Magnetic Resonance (NMR) methods.

scholarly journals Synthesis, characterization and photostability study of triazole derivatives

2021 ◽  
Vol 9 (2) ◽  
pp. 066-072
Author(s):  
Shahad Muhammad ◽  
Ahmed Ahmed
Keyword(s):  
Schiff Base ◽  
Infrared Spectroscopy ◽  
1H Nmr ◽  
13C Nmr ◽  
Uv Light ◽  
Alkyl Halide ◽  
Triazole Ring ◽  
Phenacyl Bromide ◽  
Heterocyclic Derivative ◽  
Triazole Derivatives

heterocyclic derivative contain triazole ring was synthesized and characterized the product and their structures by infrared spectroscopy, 1H-NMR, 13C-NMR and instrumental techniques. Compound (4) was synthesized by reacting of Schiff base (3) with an three moles of alkyl halide (p-phenyl phenacyl bromide). Final product played an important role in photostabilizer of polymer (PS), and showed the activity as a photostabilizer when exposed to UV light (300 hours).

1,4-Dihydropyridine: A Dependable Heterocyclic Ring with the Promising and the Most Anticipable Therapeutic Effects

2019 ◽  
Vol 19 (15) ◽  
pp. 1219-1254 ◽  
Author(s):  
Abhinav Prasoon Mishra ◽  
Ankit Bajpai ◽  
Awani Kumar Rai
Keyword(s):  
Calcium Ion ◽  
Heterocyclic Compounds ◽  
Channel Blocker ◽  
Heterocyclic Ring ◽  
Therapeutic Effects ◽  
Voltage Gated ◽  
Therapeutic Benefits ◽  
Anti Cancer ◽  
Anti Oxidant ◽  
Synthetic Medicinal

: Nowadays, heterocyclic compounds act as a scaffold and are the backbone of medicinal chemistry. Among all of the heterocyclic scaffolds, 1,4-Dihydropyridine (1,4-DHP) is one of the most important heterocyclic rings that possess prominent therapeutic effects in a very versatile manner and plays an important role in synthetic, medicinal, and bioorganic chemistry. The main aim of the study is to review and encompass relevant studies related to 1,4-DHP and excellent therapeutic benefits of its derivatives. An extensive review of Pubmed-Medline, Embase and Lancet’s published articles was done to find all relevant studies on the activity of 1,4-DHP and its derivatives. 1,4-DHP is a potent Voltage-Gated Calcium Channel (VGCC) antagonist derivative which acts as an anti-hypertensive, anti- anginal, anti-tumor, anti-inflammatory, anti-tubercular, anti-cancer, anti-hyperplasia, anti-mutagenic, anti-dyslipidemic, and anti-ulcer agent. From the inferences of the study, it can be concluded that the basic nucleus, 1,4-DHP which is a voltage-gated calcium ion channel blocker, acts as a base for its derivatives that possess different important therapeutic effects. There is a need of further research of this basic nucleus as it is a multifunctional moiety, on which addition of different groups can yield a better drug for its other activities such as anti-convulsant, anti-oxidant, anti-mutagenic, and anti-microbial. This review would be significant for further researches in the development of several kinds of drugs by representing successful matrix for the medicinal agents.

scholarly journals Crystal structure of (Z)-1-(3,4-dichlorophenyl)-3-methyl-4-[(naphthalen-1-ylamino)(p-tolyl)methylidene]-1H-pyrazol-5(4H)-one

2014 ◽  
Vol 70 (9) ◽  
pp. o955-o956 ◽  
Author(s):  
Naresh Sharma ◽  
Sanjay Parihar ◽  
R. N. Jadeja ◽  
Rajni Kant ◽  
Vivek K. Gupta
Keyword(s):  
Benzene Ring ◽  
Three Dimensional ◽  
Pyrazole Ring ◽  
Carbonyl Oxygen ◽  
Ring System ◽  
Dimensional Structure ◽  
Naphthalene Ring ◽  
Compound C ◽  
Schiff Base Compound ◽  
Base Compound

The title Schiff base compound, C28H21Cl2N3O, was synthesized by the condensation of 1-(3,4-dichlorophenyl)-3-methyl-4-(4-methylbenzoyl)-1H-pyrazol-5(4H)-one with 1-aminonaphthalene. Thep-tolyl ring is normal to the pyrazole ring, with a dihedral angle of 88.02 (14)°, and inclined to the naphthalene ring system by 78.60 (12)°. The pyrazole ring is inclined to the naphthalene ring system and the dichloro-substituted benzene ring by 63.30 (12) and 11.03 (13)°, respectively. The amino group and carbonyl oxygen atom are involved in an intramolecular N—H...O hydrogen bond enclosing anS(6) ring motif. There is also a short C—H...O contact involving the carbonyl O atom and the adjacent benzene ring. In the crystal, molecules are linked by C—H...π interactions, forming a three-dimensional structure.

scholarly journals Crystal structure and Hirshfeld surface analysis of ethyl (E)-4-[(4-hydroxy-3-methoxy-5-nitrobenzylidene)amino]benzoate

2018 ◽  
Vol 74 (8) ◽  
pp. 1079-1082
Author(s):  
Antony Samy Victoria ◽  
Palaniyappan Sivajeyanthi ◽  
Natarajan Elangovan ◽  
Kasthuri Balasubramani ◽  
Thathan Kolochi ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Surface Analysis ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Compound C ◽  
High Propensity ◽  
Benzene Rings ◽  
Schiff Base Compound ◽  
Ring Motif ◽  
Base Compound

The title Schiff base compound, C17H16N2O6, has an E configuration with respect to the C=N bond, with a dihedral angle between the two benzene rings of 31.90 (12)°. There is an intramolecular O—H...Onitro hydrogen bond present forming an S(6) ring motif. In the crystal, molecules are linked by pairs of O—H...O hydrogen bonds, forming inversion dimers enclosing an R 2 2(4) ring motif. The dimers are linked about an inversion centre by pairs of C—H...O hydrogen bonds, which enclose R 2 2(22) loops, forming chains propagating along the [10\overline{3}] direction. Hirshfeld surface analysis and fingerprint plots show enrichment ratios for the H...H, O...H and C...H contacts, indicating a high propensity of such interactions in the crystal. Both the nitro group and the CH3–CH2–O– group are positionally disordered.

Azido bridged binuclear copper(ii) Schiff base compound: synthesis, structure and electrical properties

2019 ◽  
Vol 43 (41) ◽  
pp. 16255-16263
Author(s):  
Mrinmoy Ghosh ◽  
Sandip Saha ◽  
Abhijit Banerjee ◽  
Dieter Schollmeyer ◽  
Ananda Sarkar ◽  
...  
Keyword(s):  
Schiff Base ◽  
Electrical Properties ◽  
Binuclear Copper ◽  
Current Voltage ◽  
Compound Synthesis ◽  
Current Voltage Characteristics ◽  
Schiff Base Compound ◽  
Base Compound

The structure, FESEM, Al/complex/ITO microstructure and the current–voltage characteristics of the copper(ii) azido bridged dimer.

Synthesis, crystal structure, and magnetic properties of a new tetranuclear Cu(II) Schiff base compound

2009 ◽  
Vol 362 (8) ◽  
pp. 2915-2920 ◽  
Author(s):  
Moumita Biswas ◽  
Guillaume Pilet ◽  
Javier Tercero ◽  
M. Salah El Fallah ◽  
Samiran Mitra
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Schiff Base ◽  
Schiff Base Compound ◽  
Base Compound

Electrical property and Schottky behavior of a flexible Schiff-base compound: X-ray structure and stabilization of 1D water chain

2018 ◽  
Vol 20 (38) ◽  
pp. 24744-24749 ◽  
Author(s):  
Basudeb Dutta ◽  
Joydeep Datta ◽  
Suvendu Maity ◽  
Chittaranjan Sinha ◽  
Di Sun ◽  
...  
Keyword(s):  
Schiff Base ◽  
Electrical Property ◽  
Impedance Spectroscopy ◽  
Schottky Diode ◽  
X Ray ◽  
X Ray Crystallography ◽  
Water Chain ◽  
Schiff Base Compound ◽  
Base Compound

A flexible Schiff-base compound has been synthesized and structurally confirmed by X-ray crystallography. The compound behaves as a Schottky diode, as supported by the impedance spectroscopy.

UV absorber co-intercalated layered double hydroxides as efficient hybrid UV-shielding materials for polypropylene

2019 ◽  
Vol 48 (8) ◽  
pp. 2750-2759 ◽  
Author(s):  
Ruoyu Ma ◽  
Pinggui Tang ◽  
Yongjun Feng ◽  
Dianqing Li
Keyword(s):  
Layered Double Hydroxides ◽  
Uv Light ◽  
Uv Absorber ◽  
Uv Shielding ◽  
Double Hydroxides

UV absorber co-intercalated layered double hydroxides can efficiently shield UV light and greatly enhance the anti-photoaging performance of polypropylene.

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