Curing of ED-20 epoxide resin with diesterdisulfoanhydride of 2-hydroxypropyl of saccharin-6-carboxylic acid

2018 ◽  
pp. 45-51
Author(s):  
E. T. Aslanova ◽  
◽  
T. A. Aslanov ◽  
B. A. Mamedov ◽  
A. A. Mamedova ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Epoxide Resin

Epoxy composition on the basis of triestertrisulfoimide saccharin-6-carboxylic acid

2020 ◽  
pp. 58-63
Author(s):  
E. T. Aslanova ◽  
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Carboxylic Acid ◽  
Ir Spectroscopy ◽  
Curing Temperature ◽  
Curing Agent ◽  
Epoxide Resin ◽  
Alkyl Esters ◽  
Epoxy Composition ◽  
Composition And Structure

By the interaction of the previously synthesized 2-hydroxypropyl-1,3-bis-estersulfoimide of saccharin-6-carboxylyc acid with alkyl esters of sulfimide of the same acid triestertrisulfoimide saccharin-6-carboxylic acid has been obtained. The composition and structure of the synthesized compound has been confirmed by data of elemental analysis and IR-spectroscopy. The obtained product has been as a curing agent - plasticizer for industrial epoxide resin ED-20. It has been established that the triestertrisulfoimide of saccharin-6-carboxylic acidis the effective curing agent — plasticizer of epoxide resin ED-20. The curing prosses of composition was studied by a method of differential thermal analysis on derivatograph of system “Paulik-Paulik-Erdey”. It has been revealed according to the obtained data that the synthesized triestertrisulfoimide of saccharin-6-carboxylic acidis combined well with epoxide resin ED-20 but it is cured at hard temperature regime. It has been shown that in the introduction of accelerator UP 606/2 into epoxy composition the curing temperature of composition is decreased, but its thermal, physical -mechanical values are increased.

Fibrinolytic Activity of Cerebro-Spinal Fluid and the Development of Artificial Cerebral Haematomas in Dogs

1969 ◽  
Vol 21 (02) ◽  
pp. 294-303 ◽  
Author(s):  
H Mihara ◽  
T Fujii ◽  
S Okamoto
Keyword(s):  
Cerebrospinal Fluid ◽  
Carboxylic Acid ◽  
Fibrinolytic Activity ◽  
Clinical Implications ◽  
Trans Form ◽  
Plate Method ◽  
Blood Samples ◽  
Fibrin Plate ◽  
The Brain

SummaryBlood was injected into the brains of dogs to produce artificial haematomas, and paraffin injected to produce intracerebral paraffin masses. Cerebrospinal fluid (CSF) and peripheral blood samples were withdrawn at regular intervals and their fibrinolytic activities estimated by the fibrin plate method. Trans-form aminomethylcyclohexane-carboxylic acid (t-AMCHA) was administered to some individuals. Genera] relationships were found between changes in CSF fibrinolytic activity, area of tissue damage and survival time. t-AMCHA was clearly beneficial to those animals given a programme of administration. Tissue activator was extracted from the brain tissue after death or sacrifice for haematoma examination. The possible role of tissue activator in relation to haematoma development, and clinical implications of the results, are discussed.

Behaviour of epoxide resin used to protect the “Rupe di Tropea” (southern Calabria, Italy)

2016 ◽  
Vol 38 ◽  
pp. 69-72
Author(s):  
Fabio Ietto ◽  
Emilia Le Pera ◽  
Domenico Miriello ◽  
Ruffolo, Silvestro Antonio Ruffolo ◽  
Francesco Perri
Keyword(s):  
Epoxide Resin

Stereospecific, Palladium-catalyzed C(sp3)–H Alkenylation and Alkynylation of a Proline Derivative Enabled by 8-Aminoquinoline as a Directing Group

2020 ◽  
Author(s):  
Aleksandra Balliu ◽  
Aaltje Roelofje Femmigje Strijker ◽  
Michael Oschmann ◽  
Monireh Pourghasemi Lati ◽  
Oscar Verho
Keyword(s):  
Carboxylic Acid ◽  
Building Blocks ◽  
Wide Range ◽  
Palladium Catalyzed ◽  
Directing Group ◽  
High Yields ◽  
Vinyl Iodides ◽  
Initial Results

<p>In this preprint, we present our initial results concerning a stereospecific Pd-catalyzed protocol for the C3 alkenylation and alkynylation of a proline derivative carrying the well utilized 8‑aminoquinoline directing group. Efficient C–H alkenylation was achieved with a wide range of vinyl iodides bearing different aliphatic, aromatic and heteroaromatic substituents, to furnish the corresponding C3 alkenylated products in good to high yields. In addition, we were able show that this protocol can also be used to install an alkynyl group into the pyrrolidine scaffold, when a TIPS-protected alkynyl bromide was used as the reaction partner. Furthermore, two different methods for the removal of the 8-aminoquinoline auxiliary are reported, which can enable access to both <i>cis</i>- and <i>trans</i>-configured carboxylic acid building blocks from the C–H alkenylation products.</p>

Ketones from Nickel-Catalyzed Decarboxylative, Non-Symmetric Cross-Electrophile Coupling of Carboxylic Acid Esters

2019 ◽  
Author(s):  
Jiang Wang ◽  
Brian P. Cary ◽  
Peyton Beyer ◽  
Samuel H. Gellman ◽  
Daniel Weix
Keyword(s):  
Carboxylic Acid ◽  
Solid Support ◽  
Reaction Conditions ◽  
Decarboxylative Coupling ◽  
New Strategy ◽  
The Cross ◽  
Acyl Donors ◽  
Acid Esters

A new strategy for the synthesis of ketones is presented based upon the decarboxylative coupling of N-hydroxyphthalimide (NHP) esters with S-2-pyridyl thioesters. The reactions are selective for the cross-coupled product because NHP esters act as radical donors and the thioesters act as acyl donors. The reaction conditions are general and mild, with over 40 examples presented, including larger fragments and the 20-mer peptide Exendin(9-39) on solid support.

Harnessing Applied Potential: The Anti-Markovnikov Hydrocarboxylation of Substituted Olefins

2019 ◽  
Author(s):  
Anas Alkayal ◽  
Volodymyr Tabas ◽  
Andrei V. Malkov ◽  
Benjamin Buckley
Keyword(s):  
Carboxylic Acid ◽  
Applied Potential ◽  
Markovnikov Addition

<div>The construction of carboxylic acid compounds in a selective fashion, from low value materials such as alkenes remains a long-standing challenge to synthetic chemists. In particular, anti-Markovnikov addition to styrenes are underdeveloped. Herein we report a new electrosynthetic approach to the selective hydrocarboxylation of substituted alkenes.</div>

Harnessing Applied Potential: The Anti-Markovnikov Hydrocarboxylation of Substituted Olefins

2019 ◽  
Author(s):  
Anas Alkayal ◽  
Volodymyr Tabas ◽  
Andrei V. Malkov ◽  
Benjamin Buckley
Keyword(s):  
Carboxylic Acid ◽  
Applied Potential ◽  
Markovnikov Addition

<div>The construction of carboxylic acid compounds in a selective fashion, from low value materials such as alkenes remains a long-standing challenge to synthetic chemists. In particular, anti-Markovnikov addition to styrenes are underdeveloped. Herein we report a new electrosynthetic approach to the selective hydrocarboxylation of substituted alkenes.</div>

A Simplified Protocol for the ortho-Deuteration of Acidic Aromatic Compounds in D2O

2019 ◽  
Author(s):  
Alyssa Garreau ◽  
Hanyang Zhou ◽  
Michael Young
Keyword(s):  
Carboxylic Acid ◽  
Aromatic Compounds ◽  
Large Scale ◽  
Simplified Approach ◽  
Directing Group ◽  
Large Scale Synthesis

<div>Methods to catalytically introduce deuterium in synthetically useful yields ortho to a carboxylic acid directing group on arenes typically requires D2 or CD3CO2D, which makes using these approaches cost prohibitive for large scale synthesis (equipment and reagent costs respectively). Herein we present a simplified approach using catalytic RhIII and D2O as deuterium source, and show its application to H/D exchange on various acidic substrates.</div>

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