ChemInform Abstract: Condensation Reaction of Ethyl Cyanoacetate with Dialkylboryl Derivatives of 2-Aminopyridine.

ChemInform ◽  
1987 ◽  
Vol 18 (47) ◽  
Author(s):  
V. A. DOROKHOV ◽  
S. V. BARANIN
Keyword(s):  
Condensation Reaction ◽  
Ethyl Cyanoacetate ◽  
Derivatives Of

Reactions of 3-cyano-1-methylquinolinium methyl sulphate with some C-acids and with p-nitroaniline

1981 ◽  
Vol 46 (2) ◽  
pp. 503-505 ◽  
Author(s):  
Oldřich Kocián ◽  
Miloslav Ferles
Keyword(s):  
Sodium Methoxide ◽  
Ethyl Cyanoacetate ◽  
Derivatives Of

The action of malononitrile, ethyl cyanoacetate, dibenzoylmethane and/or p-nitroaniline on compound I in the presence of sodium methoxide gives rise to derivatives of 3-cyano-1-methyl-1,4-dihydroquinoline, II and III

Untersuchungen an quartären Pyridiniumsalzen, X [1] Eine Kondensationsreaktion von 3-Cyanpyridiniumsalzen bei Einwirkung A Condensation Reaction of 3-Cyanopyridinium Salts on Addition of Alcoxides

1980 ◽  
Vol 35 (4) ◽  
pp. 490-493 ◽  
Author(s):  
Wolf-H. Gündel
Keyword(s):  
Condensation Reaction ◽  
Derivatives Of

Abstract 1-Benzyl-3-cyanopyridinium salts, in the benzyl moiety differently substituted, react in boiling alcohol with alcoxides to derivatives of hexahydro-dipyrido[l,2-a:3',2'-c]-pyrrole. At 20 °C occurs rearrangement to derivatives of 2-amino-3-pyridinecarbaldehyde.

ChemInform Abstract: NEW CONDENSATION REACTION OF CHALCONES WITH ETHYL CYANOACETATE

1981 ◽  
Vol 12 (39) ◽  
Author(s):  
E. DEGNY ◽  
S. Z. ZARD ◽  
R. PASTOR ◽  
A. CAMBON
Keyword(s):  
Condensation Reaction ◽  
Ethyl Cyanoacetate

Synthesis of some salicylic acid derivatives and determination of their acidity constants

1990 ◽  
Vol 55 (7) ◽  
pp. 1763-1768 ◽  
Author(s):  
Evgenija A. Djurendić ◽  
Terézia M. Surányi ◽  
Dušan A. Miljković
Keyword(s):  
Salicylic Acid ◽  
Condensation Reaction ◽  
Glass Electrode ◽  
Acidity Constants ◽  
Resonance Effects ◽  
Potentiometric Titration Method ◽  
Titration Data ◽  
Salicylic Acid Derivatives ◽  
Derivatives Of

Several derivatives of salicylic acid have been synthesized by the condensation reaction of methyl salicylate with α,ω-diols and α,ω-diamines, and the acidity constants of five newly prepared derivatives have been determined in 61.10% aqueous ethanol using potentiometric titration method. In order to avoid calibration of pH-meter, the standard potential of glass electrode was determined from the titration data. The results obtained are discussed with regard to different resonance effects of the ester oxygen and the amide nitrogen atoms.

23.—The Synthesis of Derivatives of Acenaphthenone

1974 ◽  
Vol 71 (4) ◽  
pp. 279-283 ◽  
Author(s):  
Michael J. Bedford ◽  
Douglas A. Crombie
Keyword(s):  
Polymeric Material ◽  
Malonic Acid ◽  
Hydroxy Acid ◽  
Ethyl Cyanoacetate ◽  
Geometric Isomer ◽  
Unsaturated Ester ◽  
Image Position ◽  
Derivatives Of

Acenaphthenequinone (I) condensed with ethyl cyanoacetate in ethanol to give the unsaturated ester (IIIb) while condensation with malonic acid in toluene in the presence of diethylamine gave the hydroxy acid (IIa). Esterification of this acid gave an ester (IIb) which could also be obtained by condensation of acenaphthenequinonewith ethyl hydrogen malonate. The acid (IIa) on dehydration gave 2-oxo-Δ1,α-acenaphtheneacetic acid (IIIa) of m.p. 230°C. This result seems to be in conflict with that of Rodionov and Federova (1950) who reported a m.p. of 160° for the acid (IIIa) which they obtained directly by condensation of acenaphthenequinone with malonic acid in ethanol in the presence of ammonia. Our efforts to repeat their result gave only impure polymeric material and it seems unlikely, therefore, that their product was simply the geometric isomer of our acid.

scholarly journals SYNTHESIS AND RESEARCH OF NITROGEN-CONTAINING XANTHANE GUM DERIVATIVES

2020 ◽  
Vol 9 (5(74)) ◽  
pp. 57-62
Author(s):  
O.R. Ahmedov ◽  
N.Sh. Rahmatova ◽  
H.S. Talipova ◽  
Z.S. Alihonova ◽  
A.S. Turaev
Keyword(s):  
Xanthan Gum ◽  
Condensation Reaction ◽  
Oxidation States ◽  
Reaction Products ◽  
Scanning Calorimetry ◽  
Quantitative Content ◽  
Degree Of Oxidation ◽  
Physicochemical Methods ◽  
Aldehyde Groups ◽  
Derivatives Of

This study presents the results concerning the synthesis of nitrogen-containing derivatives of xanthan gum. The authors obtained xanthan gum derivatives with various oxidation states through the preliminary reaction of periodic oxidation of the polysaccharide. Through the physicochemical methods of analysis, the structure and established quantitative content of aldehyde groups in the macromolecular chain of the polysaccharide were proved. It was possible to carry out a condensation reaction with guanidine and to synthesize new macromolecular derivatives in the presence of reactive aldehyde groups in the structure of xanthan gum. The synthesized derivatives were further investigated through IR spectroscopy, thermogravimetry, differential scanning calorimetry, and elemental analysis for nitrogen content. Furthermore, it is found that the amount of guanidine and the degree of substitution in the synthesized compounds are 15.3-39.0% and 34-85 mol.%. Finally, when using modified xanthan gum with a different degree of oxidation it is possible to vary the quantitative content of guanidine and the degree ofsubstitution in the reaction products.

scholarly journals Synthesis, Sorption and Metallochromy Properties of Organosilicon Derivatives of 1-Acetylguanidine

2021 ◽  
Vol 13 (1) ◽  
pp. 78-87
Author(s):  
E.N. Oborina ◽  
◽  
A.M. Nalibayeva ◽  
V.G. Fedoseeva ◽  
I.A. Ushakov ◽  
...  
Keyword(s):  
Noble Metals ◽  
Large Scale ◽  
Condensation Reaction ◽  
Building Blocks ◽  
Test Methods ◽  
Metal Extraction ◽  
Composition And Structure ◽  
Complex Test ◽  
Derivatives Of ◽  
Polymeric Structures

Increased interest in carbofunctional organosilicon monomers (silanes) and polymers (silsesquioxanes) is associated with the fact that these compounds are promising reagents and building blocks, materials for micro-electronics, agriculture and medicine, complexones, catalysts, and efficient sorbents. Thus, functional polysilsesquioxanes surpass mineral and organic sorbents in sorption properties. Moreover, they have the highest chemical and thermal stability. Along with sorption activity carbofunctional organosilicon compounds of both monomeric and polymeric structures can possess metallochromic properties. All this paves the way for the large-scale development of analytical systems for the creation of new complex test methods for the determination, concentration and separation of metals from solutions. In the present study the functional monomer N-[3-(triethoxysilyl)propyl]acetylguanidine 1 was synthesized by the condensation reaction of 1-acetylguanidine and 3-triethoxysilyl-propylamine. Poly-N-[3-silsesquioxanyl) propyl]acetylguanidine 2 was obtained by hydrolytic polycondensation of compound 1. The composition and structure of compounds 1 and 2 were confirmed by IR and 1H NMR spectroscopy, as well as by elemental analysis. Polymer 2 was studied as a sorbent for ions of heavy metals, such as Hg (II), and noble metals Ag (I), Au (III), Rh (II), Pd (II), Pt (IV) from solutions of their salts in hydrochloric or nitric acid. For polymer 2, the values of static sorption capacities have been calculated. The latter depend on the nature of the metal and have values from 78 mg/g (for platinum) to 366 mg/g for rhodium. The graphs of the degree of metal extraction depending on the sorption time and acid concentration have been plotted. A sorption mechanism is proposed, which is realized due to the chelate interaction of the metal cation (M+) with the amide groups of compounds 1 and 2. The interaction of monomer 1, in the form of indicator paper, and polymer 2, in the powder form, with salts of the studied metals is accompanied by intense specific coloration (metallochromy). Color tables of the samples after their contact with the Ag (I), Au (III), Pd (II), Pt (IV), Rh (III), Hg (II) salts are given.

Amalgamation and Scrutinizing of Leucine Derivatives Schiff bases Complexes as Antimicrobial Agent

2021 ◽  
Vol 25 ◽  
Author(s):  
Muhammad Pervaiz ◽  
Ikram Ahmad ◽  
Zohaib Saeed ◽  
Muhammad Sagir ◽  
Umer Younas ◽  
...  
Keyword(s):  
Amino Acids ◽  
Coordination Chemistry ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Condensation Reaction ◽  
Amino Acid Derivatives ◽  
Comprehensive Review ◽  
Antimicrobial Potential ◽  
Donor Ability ◽  
Derivatives Of

: The enhanced applications of Schiff bases metal complexes of amino acid derivatives have captured the attention of researchers for the synthesis of leucine derivatives of Schiff bases metal complexes. Amino acids are considered to be essential part of food supplements as well as derivatives of Schiff bases in coordination chemistry due to their donor ability. The leucine derivatives Schiff bases ligand have been synthesized by condensation reaction between amine of leucine with aldehyde or ketone bearing molecules attached with them. These complexes were characterized by different spectroscopic tools in order to confirm their structural geometries. The structural geometries are considered to be very important in order to improve the antimicrobial potential of leucine derivative metal complexes. By taking into account the antimicrobial potential of titled compounds, a comprehensive review of leucine derivatives of Schiff bases metal complexes has been compiled.

scholarly journals A new and facile synthetic approach to substituted 2-thioxoquinazolin-4-ones by the annulation of a pyrimidine derivative

2010 ◽  
Vol 6 ◽  
pp. 1056-1060 ◽  
Author(s):  
Nimalini Devi Moirangthem ◽  
Warjeet Singh Laitonjam
Keyword(s):  
Ethyl Cyanoacetate ◽  
Pyrimidine Derivative ◽  
Synthetic Approach ◽  
Facile Synthesis ◽  
Benzenoid System ◽  
Active Methylene Compounds ◽  
Pyrimidine Moiety ◽  
Derivatives Of ◽  
Active Methylene

A new and facile synthesis of 2-thioxoquinazolin-4-ones by introducing a benzenoid system in the pyrimidine moiety by reacting ethoxymethylene derivatives of 1,3-diarylthiobarbituric acids (DTBA) with active methylene compounds, such as malononitrile and ethyl cyanoacetate, in presence of ZnCl2 has been developed.

Synthesis of 5-cyanopyrazolo[3,4-b]pyridines in the reaction of 5-amino-3-methyl-1-phenylpyrazole with arylidene derivatives of malonodinitrile and ethyl cyanoacetate

1999 ◽  
Vol 36 (5) ◽  
pp. 1311-1316 ◽  
Author(s):  
Jairo Quiroga ◽  
Mario Alvarado ◽  
Braulio Insuasty ◽  
Rodolfo Moreno ◽  
Enrique Raviña ◽  
...  
Keyword(s):  
Ethyl Cyanoacetate ◽  
Derivatives Of
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