ChemInform Abstract: High-Temperature Organic Synthesis. Part 38. Thermal Synthesis of 1,2- Dithiole-3-thiones from Polysulfides.

ChemInform ◽  
2010 ◽  
Vol 24 (9) ◽  
pp. no-no
Author(s):  
L. P. TURCHANINOVA ◽  
E. N. SUKHOMAZOVA ◽  
N. A. KORCHEVIN ◽  
E. N. DERYAGINA ◽  
M. G. VORONKOV
Keyword(s):  
High Temperature ◽  
Organic Synthesis ◽  
Thermal Synthesis

Hydrothermal exploration and astrobiology: oases for life in distant oceans?

2004 ◽  
Vol 3 (2) ◽  
pp. 81-95 ◽  
Author(s):  
Christopher R. German
Keyword(s):  
High Temperature ◽  
Organic Synthesis ◽  
Autonomous Underwater Vehicle ◽  
De Novo ◽  
The Arctic ◽  
Ocean Ridges ◽  
Abiotic Organic Synthesis ◽  
Preliminary Identification ◽  
Slow Spreading ◽  
Hydrothermal Fields

High-temperature submarine hydrothermal fields on Earth's mid-ocean ridges play host to exotic ecosystems with fauna previously unknown to science. Because these systems draw significant energy from chemosynthesis rather than photosynthesis, it has been postulated that the study of such systems could have relevance to the origins of life and, hence, astrobiology. A major flaw to that argument, however, is that modern basalt-hosted submarine vents are too oxidizing and lack the abundant free hydrogen required to drive abiotic organic synthesis and/or the energy yielding reactions that the most primitive anaerobic thermophiles isolated from submarine vent-sites apparently require. Here, however, the progress over the past decade in which systematic search strategies have been used to identify previously overlooked venting on the slow-spreading Mid-Atlantic Ridge and the ultra-slow spreading Arctic and SW Indian Ridges is described. Preliminary identification of fault-controlled venting in a number of these sites has led to the discovery of at least two high-temperature hydrothermal fields hosted in ultramafic rocks which emit complex organic molecules in their greater than 360 °C vent-fluids. Whether these concentrations represent de novo organic synthesis within the hydrothermal cell remains open to debate but it is probable that many more such sites exist throughout the Atlantic, Arctic and SW Indian Oceans. One particularly intriguing example is the Gakkel Ridge, which crosses the floor of the Arctic Ocean. On-going collaborations between oceanographers and astrobiologists are actively seeking to develop a new class of free-swimming autonomous underwater vehicle, equipped with appropriate chemical sensors, to conduct long-range missions that will seek out, locate and investigate new sites of hydrothermal venting at the bottom of this, and other, ice-covered oceans.

High-temperature organic synthesis. 11. Interaction of chlorobenzene with di(n-alkyl) sulfides

1979 ◽  
Vol 28 (11) ◽  
pp. 2341-2342
Author(s):  
E. N. Sukhomazova ◽  
�. N. Deryagina ◽  
M. A. Parfenova ◽  
N. K. Lyapina ◽  
M. G. Voronkov
Keyword(s):  
High Temperature ◽  
Organic Synthesis

scholarly journals Thermal Synthesis of Polypeptides from N-Butyloxycarbonyl Oligopeptides Containing Aspartyl Residue at C-Terminus

2017 ◽  
Vol 2017 ◽  
pp. 1-16
Author(s):  
Toratane Munegumi ◽  
Takafumi Yamada
Keyword(s):  
Aspartic Acid ◽  
Organic Synthesis ◽  
Prebiotic Chemistry ◽  
Average Molecular Weight ◽  
Carboxyl Terminus ◽  
Peptide Bonds ◽  
Thermal Synthesis ◽  
Thermal Reactions ◽  
C Terminus ◽  
Aspartyl Residue

The thermal reactions of amino acids have been investigated for pure organic synthesis, materials preparation in industry, and prebiotic chemistry. N-t-Butyloxycarbonyl aspartic acid (Boc-Asp) releases 2-butene and carbon dioxide upon heating without solvents. The resulting mixture of the free molten aspartic acid was dehydrated to give peptide bonds. This study describes the thermal reactions of N-t-butyloxycarbonyl peptides (Boc-Gly-L-Asp, Boc-L-Ala-L-Asp, Boc-L-Val-L-Asp, and Boc-Gly-Gly-L-Asp) having an aspartic residue at the carboxyl terminus. The peptides were deprotected upon heating at a constant temperature between 110 and 170°C for 1 to 24 h to afford polypeptides in which the average molecular weight reached 7800.

High-temperature organic synthesis

1979 ◽  
Vol 28 (9) ◽  
pp. 1936-1938 ◽  
Author(s):  
�. N. Deryagin ◽  
�. N. Sukhomazova ◽  
O. B. Bannikova ◽  
M. G. Voronkov
Keyword(s):  
High Temperature ◽  
Organic Synthesis

Polystyrene Grafted Fluoropolymer MicroTubes:  New Supports for Solid-Phase Organic Synthesis with Useful Performance at High Temperature

1999 ◽  
Vol 1 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Chanfeng Zhao ◽  
Shuhao Shi ◽  
David Mir ◽  
David Hurst ◽  
Rongshi Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Organic Synthesis ◽  
Solid Phase ◽  
Solid Phase Organic Synthesis
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