Models of glycolysis: Glyceraldehyde as a source of energy and monomers for prebiotic condensation reactions

1986 ◽  
Vol 16 (3-4) ◽  
pp. 365-366 ◽  
Author(s):  
Arthur L. Weber
Keyword(s):  
Condensation Reactions ◽  
Prebiotic Condensation

Prebiotic condensation reactions in an aqueous medium: A review of condensing agents

1976 ◽  
Vol 7 (3) ◽  
pp. 197-224 ◽  
Author(s):  
Jos�e Hulshof ◽  
Cyril Ponnamperuma
Keyword(s):  
Aqueous Medium ◽  
Condensation Reactions ◽  
Prebiotic Condensation ◽  
Condensing Agents

scholarly journals Prebiotic condensation through wet–dry cycling regulated by deliquescence

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Thomas D. Campbell ◽  
Rio Febrian ◽  
Jack T. McCarthy ◽  
Holly E. Kleinschmidt ◽  
Jay G. Forsythe ◽  
...  
Keyword(s):  
Water Vapor ◽  
Moisture Content ◽  
Aqueous Solutions ◽  
High Temperatures ◽  
Low Temperatures ◽  
Living Systems ◽  
Biochemical Reactions ◽  
Condensation Reactions ◽  
Potential Reason ◽  
Prebiotic Condensation

Abstract Wet–dry cycling is widely regarded as a means of driving condensation reactions under prebiotic conditions to generate mixtures of prospective biopolymers. A criticism of this model is its reliance on unpredictable rehydration events, like rainstorms. Here, we report the ability of deliquescent minerals to mediate the oligomerization of glycine during iterative wet–dry cycles. The reaction mixtures evaporate to dryness at high temperatures and spontaneously reacquire water vapor to form aqueous solutions at low temperatures. Deliquescent mixtures can foster yields of oligomerization over ten-fold higher than non-deliquescent controls. The deliquescent mixtures tightly regulate their moisture content, which is crucial, as too little water precludes dissolution of the reactants while too much water favors hydrolysis over condensation. The model also suggests a potential reason why life evolved to favor the enrichment of potassium: so living systems could acquire and retain sufficient water to serve as a solvent for biochemical reactions.

Condensation reactions of furfural and its derivatives

1933 ◽  
Author(s):  
Nathaniel Oglesby Calloway
Keyword(s):  
Condensation Reactions

Knoevenagel Condensation Reactions of Cyano Malononitrile-Derivatives Under Microwave Radiation

2018 ◽  
Vol 22 (6) ◽  
pp. 519-532 ◽  
Author(s):  
Lucas Lima Zanin ◽  
David Esteban Quintero Jimenez ◽  
Luis Pina Fonseca ◽  
Andre Luiz Meleiro Porto
Keyword(s):  
Microwave Radiation ◽  
Knoevenagel Condensation ◽  
Condensation Reactions

Influence of Metal Core Composition on Redox Properties and Photoreactivity of the Clusters [H4-xRu4-xRhx(CO)12] (x = 0, 2, 3, 4)

2001 ◽  
Vol 66 (7) ◽  
pp. 1062-1077 ◽  
Author(s):  
Maarten J. Bakker ◽  
Tapani A. Pakkanen ◽  
František Hartl
Keyword(s):  
Electrochemical Properties ◽  
Electrochemical Reduction ◽  
Redox Properties ◽  
Metal Core ◽  
Loss Product ◽  
Condensation Reactions ◽  
Core Composition ◽  
Co Dissociation ◽  
Major Reduction

Electrochemical properties of tetrahedral clusters [H2Ru2Rh2(CO)12], [HRuRh3(CO)12] and [Rh4(CO)12] were investigated in order to evaluate the influence of metal core composition in the series [H4-xRu4-xRhx(CO)12] (x = 0-4). The cluster [H3Ru3Rh(CO)12] was not available in sufficient quantities. As reported for [H4Ru4(CO)12], electrochemical reduction of the hydride-containing clusters [H2Ru2Rh2(CO)12] and [HRuRh3(CO)12] also results in (stepwise) loss of hydrogen, producing the anions [HRu2Rh2(CO)12]-, [Ru2Rh2(CO)12]2- and [RuRh3(CO)12]-. These anions can also be prepared from the neutral parent clusters via chemical routes. Electrochemical reduction of [Rh4(CO)12] does not result in the formation of any stable tetranuclear anion. Instead, [Rh5(CO)15]- and [Rh6(CO)15]2- are the major reduction products detected in the course of IR spectroelectrochemical experiments. Most likely, these cluster species are formed from the secondary CO-loss product [Rh4(CO)11]2- by fast redox condensation reactions. Their reoxidation regenerates parent [Rh4(CO)12], together with some [Rh6(CO)16]. Unlike [H4Ru4(CO)12] that undergoes photochemical CO-dissociation, [H2Ru2Rh2(CO)12] and [Rh4(CO)12] are completely photostable in neat hexane and dichloromethane as well as in the presence of oct-1-ene.

Template condensation reactions of 5-methylsalicylaldehyde with 4,5-dimethyl-1,2-phenylenediamine in the presence of copper(II) and selected lanthanide(III) ions

Polyhedron ◽  
2021 ◽  
pp. 115236
Author(s):  
Małgorzata T. Kaczmarek ◽  
Joanna Strzelec ◽  
Maciej Kubicki ◽  
Jozef Kovac ◽  
Renata Jastrzab
Keyword(s):  
Condensation Reactions ◽  
Template Condensation
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