Organoselenium chemistry. Synthesis of selenetan-3-ol, 1-bromo-3-selenocyanatopropan-2-ol and 2-benzylseleno-substituted fumaricand succinic acids

1983 ◽  
Vol 36 (4) ◽  
pp. 815 ◽  
Author(s):  
AP Arnold ◽  
AJ Canty
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Organoselenium Compounds ◽  
Catalysed Reaction ◽  
Acetylenedicarboxylic Acid

Approaches to the synthesis of diselenols have led to isolation of several new organoselenium compounds. Removal of mercury, as HgS, from [1,3-diselenylpropan-2-olato(2–)-Se,Sel]-mercury(II) results in decomposition of the organoselenium fragment to selenetan-3-ol, 1,3-Dibromopropan-2-ol reacts with KSeCN to form 1-bromo-3-selenocyanatopropan-2-ol; the selenoethers 2-(benzyl- se1eno)fumaric acid [(Z)-PhCH2SeC(CO2H)=CHCO2H] and 2-(benzylseleno)succinic acid [PhCH2SeCH(CO2H)CH2CO2H] are formed by base-catalysed reaction of phenylmethaneselenol with acetylenedicarboxylic acid and maleic acid, respectively. The conformations adopted by PhCH2XCH(CO2H)CH2CO2H (X = S, Se) in acetone have been determined by 1H n.m.r. spectroscopy.

scholarly journals Preparation of polyaniline nanostructures doped with different dicarboxylic acids through template-free method

2014 ◽  
Vol 32 (3) ◽  
pp. 419-422
Author(s):  
Chuanyu Sun ◽  
Yu Wang
Keyword(s):  
Dicarboxylic Acid ◽  
Succinic Acid ◽  
Tartaric Acid ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Dicarboxylic Acids ◽  
Template Free ◽  
Acid Dopants

AbstractIn this article nanoscaled polyanilines (PANI) were prepared based on template-free method in the presence of dicarboxylic acid dopants (e.g. D-tartaric acid, succinic acid, maleic acid and fumaric acid). The trans-cis isomerization of butenedioic acid played an important role in the formation of nanostructures from the plane-like to nanofibers, and the PANI doped with maleic acid (MA) had larger diameter, higher crystallinity and conductivity than PANI doped with fumaric acid (FA).

Nanoscaled Polyaniline Doped with Different Dicarboxylic Acids Based On Template-Free Method

2011 ◽  
Vol 239-242 ◽  
pp. 219-222 ◽  
Author(s):  
Shao Jin Jia ◽  
Zhen Liu ◽  
Ping Kai Jiang ◽  
Jian Zhou
Keyword(s):  
Succinic Acid ◽  
Tartaric Acid ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Dicarboxylic Acids ◽  
Average Diameter ◽  
Template Free

With an average diameter of 148-285 nm and a conductivity of 2.38E-2- 5.88 E-2S/cm, Nanoscaled polyaniline (PANI) were synthesized based on template-free method in the presence of dicarboxylic acids dopants (e.g., D-tartaric acid, Succinic acid, maleic acid and fumaric acid). Furthermore, the trans-cis isomerization of butenedioic acid plays an important role in the formation of nanostructures from plane-like to nanofibers, and PANI-MA has larger diameter, higher crystallinity and conductivity than PANI-FA.

scholarly journals Synthesis of Mimics to 5-(2″-thienyl)-2′,3′-β-Dideoxyuridine Triphosphate

1996 ◽  
Vol 7 (2) ◽  
pp. 101-107
Author(s):  
T. Persson ◽  
A.-B. Hörnfeldt ◽  
S. Gronowitz ◽  
N.G. Johansson
Keyword(s):  
Succinic Acid ◽  
Acid Derivative ◽  
Dna Polymerase ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Hiv Rt ◽  
Cellular Dna ◽  
Derivatives Of ◽  
Acyl Derivatives ◽  
Monomethyl Ester

A series of 5′-amido derivatives of 5-(2″-thienyl)-2′,3′,5′-β-trideoxyuridine were prepared. The compounds were tested for their inhibition of cellular DNA polymerase α and α HIV-RT. The succinic fumaric and maleic acid derivatives of 5-(2″-thienyl)-2′,3′,5′-β-trideoxyuridine were investigated. None of the compounds inhibited HIV-RT. The fumaric acid derivative inhibited DNA pol α with IC50 33 μg ml−1. The succinic acid derivative was about half as active with IC50 76 μg ml−1. The 5′-N-acyl derivatives also were structurally compared to the monomethyl ester of the triphosphate using the Sybyl program.

scholarly journals Four- and Five-Carbon Dicarboxylic Acids Present in Secondary Organic Aerosol Produced from Anthropogenic and Biogenic Volatile Organic Compounds

Atmosphere ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1703
Author(s):  
Kei Sato ◽  
Fumikazu Ikemori ◽  
Sathiyamurthi Ramasamy ◽  
Akihiro Fushimi ◽  
Kimiyo Kumagai ◽  
...  
Keyword(s):  
Succinic Acid ◽  
Tartaric Acid ◽  
Fumaric Acid ◽  
Malic Acid ◽  
Maleic Acid ◽  
Secondary Organic Aerosol ◽  
Dicarboxylic Acids ◽  
Organic Aerosol ◽  
Gas Chromatography Mass Spectrometry ◽  
Reaction Products

To better understand precursors of dicarboxylic acids in ambient secondary organic aerosol (SOA), we studied C4–C9 dicarboxylic acids present in SOA formed from the oxidation of toluene, naphthalene, α-pinene, and isoprene. C4–C9 dicarboxylic acids present in SOA were analyzed by offline derivatization gas chromatography–mass spectrometry. We revealed that C4 dicarboxylic acids including succinic acid, maleic acid, fumaric acid, malic acid, DL-tartaric acid, and meso-tartaric acid are produced by the photooxidation of toluene. Since meso-tartaric acid barely occurs in nature, it is a potential aerosol tracer of photochemical reaction products. In SOA particles from toluene, we also detected a compound and its isomer with similar mass spectra to methyltartaric acid standard; the compound and the isomer are tentatively identified as 2,3-dihydroxypentanedioic acid isomers. The ratio of detected C4–C5 dicarboxylic acids to total toluene SOA mass had no significant dependence on the initial VOC/NOx condition. Trace levels of maleic acid and fumaric acid were detected during the photooxidation of naphthalene. Malic acid was produced from the oxidation of α-pinene and isoprene. A trace amount of succinic acid was detected in the SOA produced from the oxidation of isoprene.

The Effects of Sodium Citrate and an Excess of Plasminogen on Fibrinolytic Agents

1960 ◽  
Vol 04 (03) ◽  
pp. 462-472 ◽  
Author(s):  
Tage Astrup ◽  
Ida Sterndorff
Keyword(s):  
Fumaric Acid ◽  
Maleic Acid ◽  
Fibrinolytic Activity ◽  
Sodium Citrate ◽  
Plasminogen Activators ◽  
Fibrinolytic Agents ◽  
Enhancing Effect ◽  
Polycarboxylic Acids

Summary1. The presence of citrate in the normal fibrin enhanced the fibrinolytic activity of plasminogen activators, including trypsin. The effect of proteases (on normal or on heated fibrin, containing citrate) was not significantly influenced.2. The effect of plasminogen activators was also increased when excess of plasminogen was present in the normal fibrin plates.3. Fumaric acid and maleic acid belong to the polycarboxylic acids producing an enhancing effect.

Conjugated microporous polymers as visible light responsible platform for photo-redox conversion of biomass derived chemicals

2021 ◽  
Author(s):  
Bo Chen ◽  
Lang Chen ◽  
Zijun Yan ◽  
Jinyang Kang ◽  
Shan-Yong Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Succinic Acid ◽  
Maleic Acid ◽  
Microporous Polymers ◽  
Redox Conversion ◽  
Conjugated Microporous Polymers

Photocatalytic conversion of biomass derived chemicals to valuable products is a highly sustainable process. Herein we report the photocatalytic hydrogenation of maleic acid to succinic acid and oxidation of 5-hydroxymethylfurfural...

The Electrolytic Reduction of Maleic Acid to Succinic Acid in Acid Solution

1949 ◽  
Vol 96 (6) ◽  
pp. 353 ◽  
Author(s):  
Sherlock Swann ◽  
K. H. Wanderer ◽  
H. J. Schaffer ◽  
W. A. Streaker
Keyword(s):  
Acid Solution ◽  
Succinic Acid ◽  
Maleic Acid ◽  
Electrolytic Reduction

Metabolites of Aspergillus indicus: The structure and some aspects of the biosynthesis of dihydrocanadensolide

1968 ◽  
Vol 21 (11) ◽  
pp. 2775 ◽  
Author(s):  
AJ Birch ◽  
AA Qureshi ◽  
RW Rickards
Keyword(s):  
Succinic Acid ◽  
Fumaric Acid ◽  
Pyruvic Acid ◽  
Kojic Acid ◽  
Synthetic Medium ◽  
Nitropropionic Acid

Aspergillus indicus grown on a semi-synthetic medium produces a number of metabolites including kojic acid, succinic acid, fumaric acid, β-nitropropionic acid, indazonic acids, fumaryl-~danine, and dihydrocanadensolide. The last compound is shown to have the formula (I) and is biosynthesized in part from "acetate" units; the rest of the molecule may come from pyruvic acid.

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