A New Standard of Purity for Phthalic Anhydride

1958 ◽  
Vol 50 (5) ◽  
pp. 78A-79A
Keyword(s):  
Phthalic Anhydride

scholarly journals On the Acylation of 1,6-Diamino-2-oxo-1,2-dihydropyridine-3,5-dicarbonitriles

2020 ◽  
Vol 3 (1) ◽  
pp. 34
Author(s):  
Alexandra R. Chikava ◽  
Alexei A. Dolganov ◽  
Victor V. Dotsenko
Keyword(s):  
Phthalic Anhydride ◽  
Chloroacetyl Chloride ◽  
Harsh Conditions

Here, 1,6-diamino-2-oxo-1,2-dihydropyridine-3,5-dicarbonitriles, prepared by the reaction of cyanoacethydrazide with arylmethylene malononitriles, react with 1-cyanoacetyl-3,5-dimethylpyrazole and chloroacetyl chloride to give corresponding cyanoacetamides and chloroacetamides. The reaction with phthalic anhydride proceeds under harsh conditions to give 4,7-dioxo-4,7-dihydropyrido[1′,2′:2,3][1,2,4]triazolo[5,1-a]isoindole- 1,3-dicarbonitriles.

scholarly journals Anti-inflammatory effects of Capparis ecuadorica extract in phthalic-anhydride-induced atopic dermatitis of IL-4/Luc/CNS-1 transgenic mice

2020 ◽  
Vol 58 (1) ◽  
pp. 1263-1276
Author(s):  
Bo Ram Song ◽  
Su Jin Lee ◽  
Ji Eun Kim ◽  
Hyeon Jun Choi ◽  
Su Ji Bae ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Transgenic Mice ◽  
Phthalic Anhydride ◽  
Anti Inflammatory

scholarly journals Ring-Opening Copolymerization of Cyclohexene Oxide and Cyclic Anhydrides Catalyzed by Bimetallic Scorpionate Zinc Catalysts

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1651
Author(s):  
Felipe de la Cruz-Martínez ◽  
Marc Martínez de Sarasa Buchaca ◽  
Almudena del Campo-Balguerías ◽  
Juan Fernández-Baeza ◽  
Luis F. Sánchez-Barba ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Catalytic System ◽  
Phthalic Anhydride ◽  
Ring Opening ◽  
High Selectivity ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Reaction Conditions ◽  
Cyclic Anhydrides

The catalytic activity and high selectivity reported by bimetallic heteroscorpionate acetate zinc complexes in ring-opening copolymerization (ROCOP) reactions involving CO2 as substrate encouraged us to expand their use as catalysts for ROCOP of cyclohexene oxide (CHO) and cyclic anhydrides. Among the catalysts tested for the ROCOP of CHO and phthalic anhydride at different reaction conditions, the most active catalytic system was the combination of complex 3 with bis(triphenylphosphine)iminium as cocatalyst in toluene at 80 °C. Once the optimal catalytic system was determined, the scope in terms of other cyclic anhydrides was broadened. The catalytic system was capable of copolymerizing selectively and efficiently CHO with phthalic, maleic, succinic and naphthalic anhydrides to afford the corresponding polyester materials. The polyesters obtained were characterized by spectroscopic, spectrometric, and calorimetric techniques. Finally, the reaction mechanism of the catalytic system was proposed based on stoichiometric reactions.

ChemInform Abstract: First Rational Synthesis of the Thiothiono Analogue of an Unsymmetrically Substituted Phthalic Anhydride.

ChemInform ◽  
2001 ◽  
Vol 32 (15) ◽  
pp. no-no
Author(s):  
Christopher F. Morrison ◽  
D. Jean Burnell
Keyword(s):  
Phthalic Anhydride

Crystal Growth, Spectral, Thermal and Optical Properties of Phthalic Anhydride (PA) Single Crystal

2012 ◽  
Vol 584 ◽  
pp. 136-140 ◽  
Author(s):  
S. Janarthanan ◽  
Y.C. Rajan ◽  
R. Sugaraj Samuel ◽  
S. Pandi
Keyword(s):  
Spectral Analysis ◽  
Single Crystal ◽  
Phthalic Anhydride ◽  
Second Harmonic ◽  
Organic Crystals ◽  
X Ray Diffraction ◽  
Fundamental Wavelength ◽  
Ft Ir ◽  
Raman Spectral ◽  
Raman Spectral Analysis

ABSTRACT Organic single crystal of Phthalic Anhydride (PA) was successfully grown by slow evaporation method. The structure of the grown crystal was confirmed by X-ray diffraction analysis. FT-IR, and FT-Raman spectral analysis of the crystalline samples reveal that the crystalline sample consists of all functional groups. The placement of protons was identified from H1-NMR spectral analysis. UV-Visible and photoluminescence spectral analyses were carried out for the grown crystals. The thermal behavior was studied with TGA-DTA analyses. The existence of second harmonic generation (SHG) signal was observed using Nd:YAG laser with a fundamental wavelength of 1064 nm. Keywords: Organic crystals, NLO crystals

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