Complexes of carbohydrates with metal cations. IX. Synthesis of the methyl D-tagatosides, D-psicosides, D-apiosides and D-erythrosides

1977 ◽  
Vol 30 (6) ◽  
pp. 1259 ◽  
Author(s):  
SJ Angyal ◽  
CL Bodkin ◽  
JA Mills ◽  
PM Pojer
Keyword(s):  
Cation Exchange ◽  
Calcium Chloride ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Metal Cations

All the methyl glycosides of the sugars mentioned in the title were synthesized by Fischer glycosidation in the absence or in the presence of calcium chloride; addition of the salt improved the yield of some of the furanosides. The glycosides were separated on a cation-exchange resin in its calcium form. The anomeric equilibria of methyl furanosides are discussed.

scholarly journals Adsorption and possibility of separation of heavy metal cations by strong cation exchange resin

2021 ◽  
pp. 100056
Author(s):  
Hanna Vasylyeva ◽  
Ivan Mironyuk ◽  
Mykola Strilchuk ◽  
Igor Maliuk ◽  
Khrystyna Savka ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Metal Cations ◽  
Heavy Metal Cations ◽  
Strong Cation Exchange

Synthesis of 3,4-Dihydropyrano[c]chromenes Using Carbon Microsphere Supported Copper Nanoparticles (Cu-NP/C) Prepared from Loaded Cation Exchange Resin as a Catalyst

2019 ◽  
Vol 16 (2) ◽  
pp. 288-293
Author(s):  
Yogesh W. More ◽  
Sunil U. Tekale ◽  
Nitishkumar S. Kaminwar ◽  
László Kótai ◽  
Tibor Pasinszki ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cation Exchange ◽  
Copper Nanoparticles ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Environmentally Benign ◽  
High Yield ◽  
Carbon Microsphere ◽  
Catalytic Material ◽  
Operational Simplicity

Aim and Objective: The present study was performed with the aim to develop an efficient and environmentally benign protocol for the synthesis of biologically siginifcant 3, 4-dihydropyrano[c]chromenes using a new catalytic material. The protocol involves the use of a reusable, environment friendly materials and solvents with operational simplicity. Materials and Methods: Carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin were synthesized, characterized with well versed analytical techniques such as XRD, SEM and Raman spectroscopy and the synthesized material was used as a catalyst for the environmentally benign synthesis of 3,4-dihydropyrano[c]chromenes. Results: The formation of carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin was confirmed by XRD, SEM and Raman spectroscopy which was employed as a heterogeneous material for the synthesis of 3,4-dihydropyrano[c]chromenes. The products formed were characterized by the analysis of spectroscopic data - NMR, IR and mass. The safe catalytic system offers several advantages including operational simplicity, environmental friendliness, high yield, and reusability of catalyst and green chemical transformation. Conclusion: Herein we report an easy and efficient protocol for the one-pot synthesis of dihydropyrano[ c]chromenes using environmentally benign MCR approach in ethanol as the green solvent. The method developed herein constitutes a valuable addition to the existing methods for the synthesis of titled compounds.

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