Milder operating parameters for one‐step conversion of fructose to levulinic acid over sulfonated H‐β zeolite in aqueous media

2020 ◽  
Author(s):  
Swapneel K. Bisen ◽  
Prashant S. Niphadkar ◽  
Sachin U. Nandanwar ◽  
Irina Simakova ◽  
Vijay V. Bokade
Keyword(s):  
Levulinic Acid ◽  
Aqueous Media ◽  
Operating Parameters ◽  
Β Zeolite ◽  
One Step

Efficient One-Step Synthesis of Benzazoles in Aqueous Media

2009 ◽  
Vol 2009 (29) ◽  
pp. 4926-4929 ◽  
Author(s):  
Hassan Zali Boeini ◽  
Khadijeh Hajibabaei Najafabadi
Keyword(s):  
Aqueous Media ◽  
One Step

A convenient, one-step, synthesis of β-C-glycosidic ketones in aqueous media

2000 ◽  
pp. 2049-2050 ◽  
Author(s):  
Filipe Rodrigues ◽  
Yves Canac ◽  
André Lubineau
Keyword(s):  
Aqueous Media ◽  
One Step

Efficient one-step method for the extraction of cyclodiene pesticides from aqueous media and the analysis of their metabolites

1992 ◽  
Vol 40 (11) ◽  
pp. 2309-2314 ◽  
Author(s):  
Turlough F. Guerin ◽  
Stephen W. L. Kimber ◽  
Ivan R. Kennedy
Keyword(s):  
Aqueous Media ◽  
Step Method ◽  
One Step

Invited Review. A Combinatorial Approach to the Development of Environmentally Benign Organic Chemical Preparations

1999 ◽  
Vol 52 (2) ◽  
pp. 83 ◽  
Author(s):  
Christopher R. Strauss
Keyword(s):  
Hydrogen Transfer ◽  
Aldol Condensation ◽  
Aqueous Media ◽  
Environmentally Benign ◽  
Organic Chemical ◽  
Coupling Reactions ◽  
Heck Coupling ◽  
Solvent Free Conditions ◽  
Microwave Reactors ◽  
One Step

Enabling technologies and methodologies were established and combined to afford various environmentally benign processes for laboratory-scale organic synthesis and for the production of fine chemicals, intermediates and pharmaceuticals. The technologies comprised continuous and batch microwave reactors and catalytic membranes. The methodologies included solvent-free conditions, catalysed or uncatalysed processes, the use of aqueous media at high temperature and non-extractive techniques for product isolation. Applications included Hofmann eliminations, Willgerodt and Jacobs–Gould reactions, indole transformations, aldol condensation, Rupe and Meyer–Schuster rearrangements and C–C coupling reactions (including a tandem Heck coupling–dehydrogenation). New processes for catalytic etherification, uncatalysed hydrogen transfer and a one-step arylamidation were also developed. Typical products were N-(4-hydroxyphenyl)acetamide, carvacrol, a-phenylacetamide, cinnamaldehyde, cinnamyl alcohol, acetophenone, indole, 3-hydroxy-1,2-dimethyl-4-pyridone, di(2-phenylethyl) ether, di(cyclopropylmethyl) ether, 3-methylcyclopent-2-enone and a synthetic precursor of nalidixic acid.

Oxydation des alcènes par l'ion thallique. I. Stéréochimie et mécanisme de l'oxydation des cyclohexènes

1971 ◽  
Vol 49 (15) ◽  
pp. 2586-2589 ◽  
Author(s):  
C. Freppel ◽  
R. Favier ◽  
J.-C. Richer ◽  
M. Zador
Keyword(s):  
Aqueous Media ◽  
Hydroxyl Group ◽  
Step Method ◽  
One Step ◽  
Rigid Conformation

The stereochemistry of the diols obtained by oxidation of 3-t-butylcyclohexene by thallic sulfate indicates that the α hydroxyl group participates in the breaking of the C—T1 bond of the intermediate organothallous compound. The fact that only the trans diols are obtained indicates that an SN2 substitution of the thallium can be excluded. We suggest that the thallic oxidation in aqueous media of olefin of rigid conformation is an excellent one-step method of preparing trans diols. The formation of the trans diaxial diol upon oxidation of 4-t-butylcyclohexene tends to confirm that hypothesis.

Diameter-Selective Solubilization of Carbon Nanotubes by Lipid Micelles

2008 ◽  
Vol 8 (1) ◽  
pp. 420-423 ◽  
Author(s):  
Dimitrios Tasis ◽  
Konstantinos Papagelis ◽  
Dionysios Douroumis ◽  
James R. Smith ◽  
Nikolaos Bouropoulos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Aqueous Suspension ◽  
Aqueous Media ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
One Step ◽  
The One ◽  
Walled Carbon Nanotubes

The one-step dispersion of HiPco single-walled carbon nanotubes in aqueous media with the use of a synthetic lyso-phosphatidylcholine was studied. Solubilization occurs through wrapping of lipid molecules around the circumference of the tubes, yielding lipid monolayers on the graphitic sidewalls as evidenced by atomic force microscopy imaging and dynamic light scattering measurements. Raman spectroscopy showed that the dispersion and centrifugation process leads to an effective enrichment of the stable aqueous suspension in carbon nanostructures with smaller diameters.

Expeditious One‐Step Method to 5‐Aryl‐2‐furoyl Substituted Thioureas and Thiosemicarbazides in Aqueous Media

2006 ◽  
Vol 36 (7) ◽  
pp. 843-847 ◽  
Author(s):  
Xicun Wang ◽  
Zhang Zhang ◽  
Zhengjun Quan ◽  
Mangang Wang ◽  
Fang Wang ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Step Method ◽  
One Step
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