The reaction of 2-aminopyridine with some β-keto-esters in the presence of polyphosphoric acid ethyl ester

1971 ◽  
Vol 0 (0) ◽  
pp. 2163-2164 ◽  
Author(s):  
K. Bowden ◽  
T. H. Brown
Keyword(s):  
Ethyl Ester ◽  
Polyphosphoric Acid ◽  
Acid Ethyl Ester ◽  
Keto Esters

Polyphosphoric Acid Trimethylsilylester: A Useful Reagent for Organic Synthesis

2007 ◽  
Vol 2007 (9) ◽  
pp. 497-502 ◽  
Author(s):  
Simón E. López ◽  
Jelem Restrepo ◽  
José Salazar
Keyword(s):  
Ethyl Ester ◽  
Organic Synthesis ◽  
Lewis Acids ◽  
Polyphosphoric Acid ◽  
Acid Ethyl Ester ◽  
First Trimester ◽  
Synthetic Utility

This review describes the composition, preparation and applications in organic synthesis of polyphosphoric acid trimethylsilylester (PPSE). It covers the literature since it first appeared in the eighties until the first trimester of 2007. A discussion of the synthetic utility of PPSE, compared to other related reagents such as polyphosphoric acid (PPA) and polyphosphoric acid ethyl ester (PPE) as well as various Lewis acids, is also included.

scholarly journals On the Mechanism of Alkylation of beta-Keto Esters. I. Methylation of beta-Hydroxycoumarilic Acid Ethyl Ester.

1957 ◽  
Vol 11 ◽  
pp. 914-916 ◽  
Author(s):  
Arne Brändström ◽  
Ingemar Forsblad ◽  
Gösta Pettersson
Keyword(s):  
Ethyl Ester ◽  
Acid Ethyl Ester ◽  
Keto Esters

scholarly journals Effect of 3-Aminobenzoic Acid Ethyl Ester Methanesulfonate (MS-222) on Quality of Marine Cultured Turbot (Scophthalmus maximus) during Simulated Transport in Water

Fishes ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 20
Author(s):  
Jie Cao ◽  
Qi Wang ◽  
Jun Mei ◽  
Jing Xie
Keyword(s):  
Dissolved Oxygen ◽  
Ethyl Ester ◽  
Acid Ethyl Ester ◽  
Scophthalmus Maximus ◽  
Ammonia Nitrogen ◽  
Control Group ◽  
Aminobenzoic Acid ◽  
Transport Stress ◽  
Turbot Scophthalmus Maximus

This study evaluated the effect of different concentrations (20, 40 and 60 mg/L) of 3-aminobenzoic acid ethyl ester methanesulfonate (MS-222) on the quality changes in turbot during simulated transport in water. The results showed that the ammonia nitrogen content in the transportation water of each sample increased significantly, and the dissolved oxygen level decreased. The dissolved oxygen content in MS-222-treated samples was higher than that of control group (CK) samples. For turbot flesh quality, simulated transport in water led to a decrease in moisture, fat and protein contents in all samples. The MS-222-treated turbot samples showed higher pH values, glycogen contents, springiness and chewiness values and lower lactic acid contents comparing with the CK samples during simulated transport in water. In addition, the fresh and bitter amino acids in the muscle of turbot increased in each treatment group compared to the non-transported fish at the end of the simulated transport. The results showed that MS-222 treatment could retard the turbot transport stress and improve the quality of turbot during simulated transport in water.

Sonochemical synthesis of 2-substituted nicotinic acid ethyl ester derivatives: their in vitro and in silico evaluation against SIRT1

2021 ◽  
pp. 131069
Author(s):  
Chandra Sekhar Challa ◽  
Naresh Kumar Katari ◽  
Varadacharyulu Nallanchakravarthula ◽  
Devanna Nayakanti ◽  
Ravikumar Kapavarapu ◽  
...  
Keyword(s):  
Nicotinic Acid ◽  
Ethyl Ester ◽  
In Silico ◽  
Acid Ethyl Ester ◽  
Sonochemical Synthesis

scholarly journals GC-MS ANALYSIS OF INVASIVE AQUATIC WEED, PISTIA STRATIOTES L. AND EICHHORNIA CRASSIPES (MART.) SOLMS

2017 ◽  
Vol 9 (3) ◽  
pp. 111 ◽  
Author(s):  
Tulika Tyagi ◽  
Mala Agarwal
Keyword(s):  
Methyl Ester ◽  
Ethyl Ester ◽  
Eichhornia Crassipes ◽  
Acid Methyl Ester ◽  
Acid Ethyl Ester ◽  
Pistia Stratiotes ◽  
Aquatic Weed ◽  
Hexadecenoic Acid ◽  
Hexadecanoic Acid ◽  
Acid Methyl

Objective: To investigate the bioactive components of an invasive aquatic weed, Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms vegetative parts by using Gas Chromatography-Mass Spectrometer (GC-MS).Methods: The chemical compositions of the ethanol extract of whole plant Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms was investigated using Agilent Technologies GC-MS (GC-7890A, MS 5975C).Results: The results of GC-MS analysis of the ethanolic extract revealed the existence of 28 phytochemical compounds in Pistia stratiotes L. n-Hexadecanoic acid,-11-Hexadecenoic acid, ethyl ester, Hexadecanoic acid, ethyl ester, Octadecanoic acid, ethyl ester, 2-Cyclopenten-1-one, 5-hydroxy-2,3-dimethyl, L-Glutamine, 2-Pentadecanone, 6,10,14-trimethyl, Linolelaidic acid, methyl ester, 9,12,15-Octadecatrienoic acid, methyl ester,(Z,Z,Z), Nonadecane, 12,15-Octadecadiynoic acid, methyl ester, Hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester, Diisooctyl phthalate, Docosanoic acid, ethyl ester, Stigmasterol, Bis(2-ethylhexyl) phthalate, 1-Monolinoleoylglycerol trimethylsilyl ether, Ethyl iso-allocholate are the major compound.The ethanolic extract of Eichhornia crassipes (Mart.) Solms contains 43 phytochemical compounds of high and low molecular weight n-Hexadecanoic acid, E-11-Hexadecenoic acid, ethyl ester, Palmitic acid, Phytol, 9,12,15-Octadecatrienal, 9,12-Octadecadienoic acid, ethyl ester, Linolenic acid, ethyl ester, Stearic acid, ethyl ester, Hexadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester, α-Glyceryl linolenate, 1-Monolinoleoylglycerol trimethylsilyl ether, Linoleic acid, 2,3-bis-(O-TMS)-propyl ester, Stigmasterol, Linolelaidic acid, methyl ester, 9,12,15-Octadecatrienoic acid, ethyl ester, (Z,Z,Z), Ethyl iso-allocholate, Cholesta-22,24-dien-5-ol, 4,4-dimethyl are the major compounds.These results indicates Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms possess potent antioxidant, anti-inflammatory, anticancer, antitumour, antiarthritic, cancer preventive, antibacterial effects so can be recommended as a plant of phytopharmaceutical importance.Conclusion: The ethanol extract of Pistia stratiotes L. and Eichhornia crassipes (Mart.) Solms proves as a potential source of bioactive compounds of pharmacological importance.

Sign in / Sign up

Export Citation Format

Share Document