scholarly journals Cation-exchange resin Characterisation and Carrier gas Performance with Mesoporous Silica Membranes for Ethyl lactate Separation

Author(s):  
Edidiong Okon ◽  
Habiba Shehu ◽  
Mohammed Kajama, Ngozi Nwogu ◽  
Ifeyinwa Orakwe and Gobina Edward ◽  
2017 ◽  
Vol 13 (6) ◽  
Author(s):  
Leila Samiee ◽  
Saeedeh Tasharrofi ◽  
Sedigheh Sadegh Hassani ◽  
Milad Fardi ◽  
Babak Mazinani

2019 ◽  
Vol 16 (2) ◽  
pp. 288-293
Author(s):  
Yogesh W. More ◽  
Sunil U. Tekale ◽  
Nitishkumar S. Kaminwar ◽  
László Kótai ◽  
Tibor Pasinszki ◽  
...  

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.


Author(s):  
Trung Thanh Nguyen ◽  
Vu Anh Khoa Tran ◽  
Le Ba Tran ◽  
Phuoc Toan Phan ◽  
Minh Tan Nguyen ◽  
...  

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