scholarly journals New bio-polyol based on white mustard seed oil for rigid PUR-PIR foams

2018 ◽  
Vol 20 (2) ◽  
pp. 24-31 ◽  
Author(s):  
Joanna Paciorek-Sadowska ◽  
Marcin Borowicz ◽  
Bogusław Czupryński ◽  
Ewa Tomaszewska ◽  
Joanna Liszkowska
Keyword(s):  
Acid Number ◽  
Raw Material ◽  
Mustard Oil ◽  
Second Step ◽  
Mustard Seed ◽  
White Mustard ◽  
Step Method ◽  
H Nmr ◽  
Polyurethane Composites ◽  
C Nmr

AbstractA new bio-polyol based on white mustard oil (Synapis alba) and 2,2′-mercaptodiethanol (2,2′-MDE) was obtained. The synthesis was carried out by two-step method. In the first stage, the double bond of the unsaturated fatty acid residues was oxidized, and in the second step the epoxy rings were opened with 2,2’-MDE. The properties of the obtained bio-polyol for application as raw material in polyurethane-polyisocyanurate foams (PUR-PIR) - hydroxyl number, acid number, density, viscosity, pH, water content, FTIR,1H NMR and13C NMR were investigated. Based on the obtained results, foaming formulations containing 0 to 0.6 R of the new bio-polyol were prepared. Significant impact of bio-polyol on apparent density, compressive strength, brittleness, flammability, water absorption and thermal conductivity of polyurethane composites were noted. Modified foam had better functional properties than reference foam e.g. lower brittleness, better thermal insulation properties and better fire resistance.

scholarly journals Synthesis, Characterization, and Agricultural Biological Activities of 5-Fluoro-2-hydroxy Butyrophenone

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Fengli Xin ◽  
Chunhua Du ◽  
Gongjia Lan ◽  
Zhuanping Wu
Keyword(s):  
Lactuca Sativa ◽  
Biological Activities ◽  
Raw Material ◽  
Synthetic Approach ◽  
Target Compound ◽  
Echinochloa Crusgalli ◽  
Agricultural Plant ◽  
H Nmr ◽  
Valsa Mali ◽  
C Nmr

A novel synthetic approach towards 5-fluoro-2-hydroxy butyrophenone is reported. Using 4-fluorophenol as a raw material, the processes of etherification protection, Friedel-Crafts acylation and demethylation provide the target compound under mild conditions. The structure was characterized by the melting point and IR, MS,1H-NMR, and13C-NMR spectroscopy. The bioassay results indicate that the target compound exhibits potent antifungal activities againstValsa mali,Coniella dipodiella, and other agricultural plant fungi. The target compound also shows potent herbicidal activities forLactuca sativa, a dicotyledon, andEchinochloa crus-galli, a monocotyledon. The toxicity regression C50values of the compound againstValsa mali,Coniothyrium diplodiella,Lactuca sativaseedling, andEchinochloa crusgalliseedling were calculated by SPSS. The Hormesis effect for roots ofEchinochloa crusgalliwas confirmed.

New bio-polyol based on white mustard seed (Sinapis alba) as an alternative raw material for the polyurethane industry

Polimery ◽  
2018 ◽  
Vol 63 (10) ◽  
pp. 694-699 ◽  
Author(s):  
Joanna Paciorek-Sadowska ◽  
Marcin Borowicz ◽  
Boguslaw Czuprynski ◽  
Joanna Liszkowska
Keyword(s):  
Sinapis Alba ◽  
Raw Material ◽  
Mustard Seed ◽  
White Mustard

scholarly journals Synthesis of bis(3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoyl)(phenyl)phosphine oxide – a tailor-made photoinitiator for dental adhesives

2010 ◽  
Vol 6 ◽  
Author(s):  
Norbert Moszner ◽  
Iris Lamparth ◽  
Jörg Angermann ◽  
Urs Karl Fischer ◽  
Frank Zeuner ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Acid Chloride ◽  
Storage Stability ◽  
Second Step ◽  
Polar Solvents ◽  
Dental Adhesives ◽  
H Nmr ◽  
The Third ◽  
The Poor ◽  
C Nmr

Because of the poor solubility of the commercially available bisacylphosphine oxides in dental acidic aqueous primer formulations, bis(3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoyl)(phenyl)phosphine oxide (WBAPO) was synthesized starting from 3-(chloromethyl)-2,4,6-trimethylbenzoic acid by the dichlorophosphine route. The substituent was introduced by etherification with 2-(allyloxy)ethanol. In the second step, 3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoic acid was chlorinated. The formed acid chloride showed an unexpected low thermal stability. Its thermal rearrangement at 180 °C resulted in a fast formation of 3-(chloromethyl)-2,4,6-trimethylbenzoic acid 2-(allyloxy)ethyl ester. In the third step, the acid chloride was reacted with phenylphosphine dilithium with the formation of bis(3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoyl)(phenyl)phosphine, which was oxidized to WBAPO. The structure of WBAPO was confirmed by 1H NMR, 13C NMR, 31P NMR, and IR spectroscopy, as well as elemental analysis. WBAPO, a yellow liquid, possesses improved solubility in polar solvents and shows UV–vis absorption, and a high photoreactivity comparable with the commercially available bisacylphosphine oxides. A sufficient storage stability was found in dental acidic aqueous primer formulations.

Synthesis of Zingerone Using NiCl2•6H2O-NaBH4 as a Selective Hydrogenation Reaction Agent

2019 ◽  
Vol 948 ◽  
pp. 127-132
Author(s):  
Murdiah ◽  
Deni Pranowo ◽  
Tri Joko Raharjo
Keyword(s):  
Mild Condition ◽  
Selective Hydrogenation ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Hydrogenation Reaction ◽  
Second Step ◽  
H Nmr ◽  
Ft Ir ◽  
High Yields ◽  
C Nmr

Synthesis of zingerone (4-(4-hydroxy-3-methoxyphenyl)-2-butanone) has been done. The first step was to synthesize the compound (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-on) through a cross aldol condensation reaction between vanilin:acetone mol ratio of 1:5:5, for 5 hours in high yields (97%). The second step was the selective hydrogenation of (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-on) with NiCl2•6H2O-NaBH4 catalyst in mild condition. Based on the FT-IR, 13C-NMR and 1H-NMR and GC-MS analyses, the synthesis of zingerone has been successfully synthesized by selective hydrogenation reaction with 80% yield.

scholarly journals Separation and Enrichment of Omega 3, 6, and 9 Fatty Acids from the By-Products of Vietnamese Basa Fish Processing using Deep Eutectic Solvent

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Thanh Xuan Le Thi ◽  
Hoai Lam Tran ◽  
Thanh Son Cu ◽  
Son Lam Ho
Keyword(s):  
Fatty Acids ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Raw Material ◽  
Molar Ratio ◽  
Omega 3 ◽  
Fish Processing ◽  
H Nmr ◽  
By Products ◽  
C Nmr

Omega 3, 6, and 9 fatty acids were separated and enriched successfully from the by-products of Vietnamese Basa fish processing by the deep eutectic solvent. The total amounts of omega fatty acids were about 57% in the raw material, and they were amounted to 91% after the first separation by DES. The optimal mass ratio is 20 g methyl ester with 200 g methanol and 15–20 g DES. Moreover, the ionic liquid-DES was successfully synthesized with the molar ratio of choline chloride/urea of 1 : 1 and 2 : 1. The characteristics of DES were determined and demonstrated by FTIR, TGA, DSC, 1H-NMR, and 13C-NMR analysis methods.

Performance Evaluation of the Percarbonate and Perborate Bleach Activators Synthesized by a Low-Cost, Two-Step Method from Phenol

2021 ◽  
Vol 58 (5) ◽  
pp. 353-359
Author(s):  
Omid Shojaei
Keyword(s):  
Performance Evaluation ◽  
Energy Consumption ◽  
Room Temperature ◽  
Low Cost ◽  
Second Step ◽  
Step Method ◽  
H Nmr ◽  
Precursor Material ◽  
Cotton Bleaching ◽  
Bleach Activators

Abstract Bleach activators decrease the energy consumption and fabrics damage in the process of laundry and industrial cotton bleaching. Herein, we demonstrate a low-cost, two-step method for the synthesis of sodium nonanoyloxybenzene sulfonate and sodium lauroyloxybenzene sulfonate from phenol as a simple precursor material for efficient bleach activators. Initially, phenol was sulfonated to sodium p-phenolsulfonate. In the second step, it was acylated with nonanoyl chloride and dodecanoyl chloride to synthesize sodium nonanoyloxybenzene sulfonate and sodium lauroyloxybenzene sulfonate, respectively. Sodium p-phenolsulfonate and the obtained bleach activators were characterized by thermogravimetric analysis, IR-, and 1H NMR spectroscopy. The investigation of their detergency efficiency on different stains and substrates revealed that the as-synthesized bleach activators outperform the commercial tetraacetylethylenediamine (TAED) at room temperature (25°C). The detergency efficiency of sodium lauroyloxybenzene sulfonate for hydrophobic stains at a rather low temperature of 40°C remarkably rises to about 90%.

scholarly journals SINTESIS XANTON DARI ASAM 2-PHENOXYBENZOIC ACID SEBAGAI BAHAN DASAR OBAT MALARIA BARU

2013 ◽  
Vol 15 (2) ◽  
pp. 25-34
Author(s):  
Amanatie Amanatie ◽  
Jumina Jumina ◽  
Mustofa Mustofa ◽  
M. Hanafi
Keyword(s):  
Sulfuric Acid ◽  
Acid Synthesis ◽  
Raw Material ◽  
H Nmr ◽  
Ft Ir ◽  
Acid Catalyzed ◽  
C Nmr

Synthesis of xanthone was conducted from the raw material of 2-phenoxybenzoic acid through acid-catalyzed-cyclization. The product was characterized using UV- Vis, 1 13 d FT-IR, H-NMR, C-NMR, an LC-MS Cyclization of 2-phenoxybenzoic acid using sulfuric acid catalyt gave xanthone in 86.11 % yield. These compounds as the basis of new malaria drugs.Keywords 2-phenoxybenzoic acid, Synthesis, Xanthone, Characterized.

Conformational structure of ethylene glycol dibenzoate. Vibrational and NMR spectra

1981 ◽  
Vol 46 (8) ◽  
pp. 1913-1929 ◽  
Author(s):  
Bohdan Schneider ◽  
Pavel Sedláček ◽  
Jan Štokr ◽  
Danica Doskočilová ◽  
Jan Lövy
Keyword(s):  
Ethylene Glycol ◽  
Vibrational Spectra ◽  
Nmr Spectra ◽  
Coupling Constants ◽  
Conformational Structure ◽  
Infrared And Raman Spectra ◽  
H Nmr ◽  
Liquid States ◽  
Crystalline Forms ◽  
C Nmr

It was found that three crystalline forms of ethylene glycol dibenzoate can be prepared. Infrared and Raman spectra of these three forms, as well as of the glassy and liquid states, were measured. From 3JHH coupling constants obtained by analysis of the 13C satellite band of the -CH2- group in 1H NMR spectra, and from the 3JCH coupling constants of the -CO.O.CH2- fragment obtained by analysis of the carbonyl band in 13C NMR spectra it was found that in the liquid state the -CH2-CH2- group exists predominantly in the gauche conformational structure, and the bonds C-O-C-C assume predominantly a trans orientation. The results of the analysis of NMR and vibrational spectra were used for the structural interpretation of conformationally sensitive bands in vibrational spectra of ethylene glycol dibenzoate.

Synthesis of 2-amino-5,7-dimethyl-4-oxopyrido[3,4-e]-1,3-thiazines

1983 ◽  
Vol 48 (12) ◽  
pp. 3426-3432 ◽  
Author(s):  
Dušan Koščík ◽  
Pavol Kristian ◽  
Ondrej Forgáč
Keyword(s):  
Spectral Data ◽  
Chlorine Atom ◽  
Mass Spectra ◽  
High Reactivity ◽  
Secondary Amines ◽  
Dimroth Rearrangement ◽  
H Nmr ◽  
New Synthesis ◽  
C Nmr

New synthesis of pyrido[3,4-e]-1,3-thiazines consisting in reaction of 2,6-dimethyl-4-chloronicotinoyl isothiocyanate with primary or secondary amines, or with benzaldehyde phenylhydrazone, is described. High reactivity of the chlorine atom does not allow isolation of the corresponding thioureas, arising as intermediates, except in the case of the benzylamino derivative. Structure of the products was unequivocally confirmed by their spectral data (IR, UV, 1H NMR, 13C NMR and mass spectra). The synthesized derivatives do not undergo the Dimroth rearrangement.

Oxynemorensine, an alkaloid from Senecio nemorensis L., var. subdecurrens GRISEB

1980 ◽  
Vol 45 (2) ◽  
pp. 548-558 ◽  
Author(s):  
Antonín Klásek ◽  
Petr Sedmera ◽  
Jindřich Vokoun ◽  
Anna Boeva ◽  
Svatava Dvoráčková ◽  
...  
Keyword(s):  
Unsaturated Acid ◽  
Mass Spectra ◽  
H Nmr ◽  
C Nmr

From S. nemorensis L., var. subdecurrens GRISEB. there were isolated the previously obtained alkaloids nemorensine (I), retroisosenine (II), bulgarsenine (III) and, in addition, the alkaloid oxynemorensine which was assigned the structure VIII on the basis of the interpretation of the 1H-NMR, 13C-NMR, mass spectra, and on that of the identification of the products of hydrolysis and reduction. Furthermore, the isolation of the cis-nemorensic acid (V) as well as that of the unsaturated acid IV, and the transformation of bulgarsenine (III) to nemorensine (I) were described.

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