A Switchable Domino Process for the Construction of Novel CO 2 ‐Sourced Sulfur‐Containing Building Blocks and Polymers

2019 ◽  
Vol 131 (34) ◽  
pp. 11894-11899 ◽  
Author(s):  
Farid Ouhib ◽  
Bruno Grignard ◽  
Elias Van Den Broeck ◽  
André Luxen ◽  
Koen Robeyns ◽  
...  
Keyword(s):  
Building Blocks ◽  
Sulfur Containing

A Switchable Domino Process for the Construction of Novel CO 2 ‐Sourced Sulfur‐Containing Building Blocks and Polymers

2019 ◽  
Vol 58 (34) ◽  
pp. 11768-11773 ◽  
Author(s):  
Farid Ouhib ◽  
Bruno Grignard ◽  
Elias Van Den Broeck ◽  
André Luxen ◽  
Koen Robeyns ◽  
...  
Keyword(s):  
Building Blocks ◽  
Sulfur Containing

Synthesis, characterization and environmental applications of nanocrystalline zeolites

2017 ◽  
Author(s):  
Vicki H. Grassian ◽  
Sarah C. Larsen
Keyword(s):  
Catalytic Reduction ◽  
Organic Phosphorus ◽  
Environmental Contaminants ◽  
Building Blocks ◽  
Environmental Applications ◽  
Environmental Catalysis ◽  
Hierarchical Zeolite ◽  
Volatile Organic ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds

This article describes the synthesis, characterization and environmental applications of nanocrystalline zeolites. It begins by considering the use of nanocrystalline zeolites as building blocks in the preparation of hierarchical zeolite structures, followed by a discussion of the synthesis of silicalite-1 with systematically varied crystal sizes, along with the synthesis of nanocrystalline aluminosilicates, NaZSM-5 and NaY. It then looks at the various applications of nanozeolites and hierarchical zeolite structures for environmental catalysis, adsorption of volatile organic compounds and other environmental contaminants, selective catalytic reduction of nitrogen oxide, and decontamination of organic phosphorus and sulfur-containing compounds. It also examines the unique properties and reactivity of nanocrystalline zeolites and concludes by assessing their potential for future environmental applications.

Lipoates as building blocks of sulfur-containing branched macromolecules

2015 ◽  
Vol 6 (39) ◽  
pp. 6936-6945 ◽  
Author(s):  
Houliang Tang ◽  
Nicolay V. Tsarevsky
Keyword(s):  
Radical Polymerization ◽  
Building Blocks ◽  
Degradable Polymers ◽  
Ene Reactions ◽  
Step Growth ◽  
Sulfur Containing ◽  
Polymerization Conditions

Under radical polymerization conditions, 2-acryloyloxyethyl lipoate (AOELp) yielded, prior to gelation, soluble, highly branched, reductively degradable disulfide-containing polymers. The reduction of AOELp afforded a dithiol acrylate, which participated in radical or ionic step-growth thiol-ene reactions, yielding highly branched reductively non-degradable polymers with thioether-type sulfur atoms in the backbones.

scholarly journals Use of 3-halo-1-azaallylic anions in heterocyclic chemistry

2003 ◽  
Vol 75 (10) ◽  
pp. 1433-1442 ◽  
Author(s):  
Nicola Giubellina ◽  
Wim Aelterman ◽  
Norbert De Kimpe
Keyword(s):  
Organic Chemistry ◽  
Large Range ◽  
Building Blocks ◽  
Pharmaceutical Compounds ◽  
Heterocyclic Chemistry ◽  
Active Compounds ◽  
Flavor Compound ◽  
Substituted Pyridines ◽  
Physiologically Active Compounds ◽  
Sulfur Containing

The synthetic potential of lithio 3-halo-1-azaallylic anions as building blocks in organic chemistry and especially in heterocyclic chemistry will be highlighted by the synthesis of functionalized imines, obtained after reaction of 3-halo-1-azaallylic anions with het- eroatom-substituted electrophiles. Thus, the latter generated functionalized imines are suitable building blocks for the synthesis of a whole range of heterocycles and physiologically active compounds, including agrochemicals and pharmaceuticals. 3-Halo-1-azaallylic anions were used in the synthesis of N-alkyl-3,3-dichloroazetidines, 2,3-disubstituted pyrroles, piperidines, 2-substituted pyridines, 2-alkoxytetrahydrofurans,etc., from which a large range of useful and interesting chemicals can be produced, e.g., 2-azetines and 9-alkyl- 2-phenyl-3a-beta,4,6,7,8,9,9a-beta,9b-beta-octahydro-1H-pyrrolo [3,4,h]quinoline-1,3-diones. The utility of the present methodology is demonstrated by the synthesis of the pheromone (S)-manicone, the sulfur-containing flavor compound 2-[(methylthio)methyl ]-2-butenal, and some agrochemical and pharmaceutical compounds.

A Review on Thiocyanation of Indoles

2020 ◽  
Vol 17 ◽  
Author(s):  
Chitteti Divyavani ◽  
Pannala Padmaja ◽  
Vinod G. Ugale ◽  
Pedavenkatagari Narayana Reddy
Keyword(s):  
Bond Formation ◽  
Building Blocks ◽  
Biologically Active ◽  
Indole Derivatives ◽  
Pharmacological Activities ◽  
New Methods ◽  
Sulfur Containing ◽  
Biological And Pharmacological Activities ◽  
Sulfur Bond

Background:: The thiocyanation of indoles is a direct way for carbon sulfur bond formation to access 3- thiocyanato-indoles. 3-Thiocyanato-indoles exhibit potent biological and pharmacological activities and also serve as building blocks to synthesize many biologically active sulfur-containing indole derivatives. Objective:: The aim of this review is to highlight different approaches for the thiocyanation of indoles focusing on the scope and mechanism. Conclusion:: In this review, we have summarized various methods for the thiocyanation of indoles. Selected new methods for the preparation of 3-thiocyanato-indoles will be highlighted. The mechanistic aspects and significance of the methods are briefly discussed.

1-alkyl 3,5-diallyl isocyanurates as synthetic building blocks for sulfur-containing macroheterocycles

2004 ◽  
Vol 74 (8) ◽  
pp. 1267-1276
Author(s):  
S. G. Fattakhov ◽  
M. M. Shulaeva ◽  
L. F. Saifina ◽  
Yu. Ya. Efremov ◽  
I. Kh. Rizvanov ◽  
...  
Keyword(s):  
Building Blocks ◽  
Sulfur Containing

scholarly journals (4+3)-Cycloaddition of Donor-Acceptor Cyclopropanes with Thiochalcones: A Diastereoselective Access to Tetrahydrothiepines

2019 ◽  
Author(s):  
André U. Augustin ◽  
J. Luca Merz ◽  
Peter G. Jones ◽  
Grzegorz Mloston ◽  
Daniel Werz
Keyword(s):  
Lewis Acid ◽  
Functional Group ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Mild Conditions ◽  
Donor Acceptor ◽  
Acid Catalyzed ◽  
Sulfur Containing

A general approach is described for the formation of tetrahydrothiepines using donor-acceptor cyclopropanes. Thiochalcones, functioning as sulfur-containing four-atom building blocks, were reacted in a Lewis-acid-catalyzed formal (4+3)-cycloaddition reaction with donor-acceptor cyclopropanes as three-atom building blocks. Under mild conditions various tetrahydrothiepines were synthesized in good yields in a stereosepecific reaction with high functional group tolerance.

scholarly journals (4+3)-Cycloaddition of Donor-Acceptor Cyclopropanes with Thiochalcones: A Diastereoselective Access to Tetrahydrothiepines

2019 ◽  
Author(s):  
André U. Augustin ◽  
J. Luca Merz ◽  
Peter G. Jones ◽  
Grzegorz Mloston ◽  
Daniel Werz
Keyword(s):  
Lewis Acid ◽  
Functional Group ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Mild Conditions ◽  
Donor Acceptor ◽  
Acid Catalyzed ◽  
Sulfur Containing

A general approach is described for the formation of tetrahydrothiepines using donor-acceptor cyclopropanes. Thiochalcones, functioning as sulfur-containing four-atom building blocks, were reacted in a Lewis-acid-catalyzed formal (4+3)-cycloaddition reaction with donor-acceptor cyclopropanes as three-atom building blocks. Under mild conditions various tetrahydrothiepines were synthesized in good yields in a stereosepecific reaction with high functional group tolerance.

Photochemical Evolution of Interstellar/Precometary Organic Material

1997 ◽  
Vol 161 ◽  
pp. 23-47 ◽  
Author(s):  
Louis J. Allamandola ◽  
Max P. Bernstein ◽  
Scott A. Sandford
Keyword(s):  
Origin Of Life ◽  
Building Blocks ◽  
Complex Species ◽  
Infrared Observations ◽  
Interstellar Ice ◽  
Polycyclic Aromatic ◽  
Ultraviolet Photolysis ◽  
The Origin Of Life ◽  
Simple Molecules ◽  
Complex Organic

AbstractInfrared observations, combined with realistic laboratory simulations, have revolutionized our understanding of interstellar ice and dust, the building blocks of comets. Since comets are thought to be a major source of the volatiles on the primative earth, their organic inventory is of central importance to questions concerning the origin of life. Ices in molecular clouds contain the very simple molecules H2O, CH3OH, CO, CO2, CH4, H2, and probably some NH3and H2CO, as well as more complex species including nitriles, ketones, and esters. The evidence for these, as well as carbonrich materials such as polycyclic aromatic hydrocarbons (PAHs), microdiamonds, and amorphous carbon is briefly reviewed. This is followed by a detailed summary of interstellar/precometary ice photochemical evolution based on laboratory studies of realistic polar ice analogs. Ultraviolet photolysis of these ices produces H2, H2CO, CO2, CO, CH4, HCO, and the moderately complex organic molecules: CH3CH2OH (ethanol), HC(= O)NH2(formamide), CH3C(= O)NH2(acetamide), R-CN (nitriles), and hexamethylenetetramine (HMT, C6H12N4), as well as more complex species including polyoxymethylene and related species (POMs), amides, and ketones. The ready formation of these organic species from simple starting mixtures, the ice chemistry that ensues when these ices are mildly warmed, plus the observation that the more complex refractory photoproducts show lipid-like behavior and readily self organize into droplets upon exposure to liquid water suggest that comets may have played an important role in the origin of life.

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