Search

Your search keyword '"Ujwal Pratim Saikia"' showing total 5 results
Start Over Author "Ujwal Pratim Saikia" Topic cellulose
5 results on '"Ujwal Pratim Saikia"'

1. Bi (NO3)3·5H2O and cellulose mediated Cu-NPs — A highly efficient and novel catalytic system for aerobic oxidation of alcohols to carbonyls and synthesis of DFF from HMF

Author

Farhaz Liaquat Hussain, Mrinaly Suri, Dilip Konwar, Dipak Kumar Dutta, Diganta Baruah, Pinaki Sengupta, and Ujwal Pratim Saikia

Subjects
Primary (chemistry), 010405 organic chemistry, Chemistry, Process Chemistry and Technology, General Chemistry, 010402 general chemistry, Furfural, Key features, 01 natural sciences, Catalysis, 0104 chemical sciences, chemistry.chemical_compound, Biofuel, Alcohol oxidation, Functional group, Organic chemistry, Cellulose
Abstract

A highly efficient and versatile catalytic system for oxidation of primary and secondary aromatic alcohols to carbonyls has been developed. High efficiency, general synthetic applicability, broader functional group tolerance and versatility towards oxidation of both primary and secondary aromatic alcohols are the key features of this green and sustainable protocol. Selective oxidation of 5-hydroxymethyl furfural (HMF) to biofuel 2,5-diformylfuran (DFF) has been observed in excellent yields. Use of sustainable bio-polymer cellulose as a Cu-nanoparticle support makes the catalytic system environmentally benign.

Published
2016

2. Cu-nanoparticles on cellulose/H2O–CH3CN/microwave: a green system for the selective oxidation of alcohols to aldehydes

Author

Ujwal Pratim Saikia, Diganta Baruah, Pallab Pahari, and Dilip Konwar

Subjects
Ligand, Organic Chemistry, Heterogeneous catalysis, Biochemistry, Catalysis, Solvent, chemistry.chemical_compound, chemistry, Alcohol oxidation, Drug Discovery, Organic chemistry, Cellulose, Chemoselectivity, Microwave
Abstract

We report a new alternative ligand and additive free recyclable green heterogeneous catalytic system, Cu-nanoparticles on cellulose template that gives efficient and selective aerobic oxidation of a broad range of benzylic alcohols, cinnamyl alcohols, and heteroaryl alcohols to the corresponding aldehydes under microwave irradiation. Use of green solvent, very short reaction time, and recyclability of the catalyst make this protocol highly advantageous.

Published
2015

3. Deprotection of oximes, imines, and azines to the corresponding carbonyls using Cu-nanoparticles on cellulose template as green reusable catalyst

Author

Diganta Baruah, Pallab Pahari, Ujwal Pratim Saikia, Dipak Kumar Dutta, and Dilip Konwar

Subjects
Cu nanoparticles, chemistry.chemical_compound, chemistry, General Chemical Engineering, Yield (chemistry), Microwave irradiation, Organic chemistry, General Chemistry, Cellulose, Catalysis
Abstract

The deprotection of wide varieties of oximes, imines, and azines to their corresponding carbonyls has been achieved using Cu-nanoparticles on a cellulose template as a reusable catalyst. The reactions were carried out at 80–100 °C using microwave irradiation in water under neutral condition. The catalyst can be reused for several cycles with good to excellent yield.

Published
2014

4. ChemInform Abstract: Cu-Nanoparticles on Cellulose/H2O-CH3CN/Microwave: A Green System for the Selective Oxidation of Alcohols to Aldehydes

Author

Dilip Konwar, Diganta Baruah, Ujwal Pratim Saikia, and Pallab Pahari

Subjects
Cu nanoparticles, chemistry.chemical_compound, chemistry, Alcohol oxidation, Nanoparticle, Organic chemistry, chemistry.chemical_element, General Medicine, Cellulose, Copper, Environmentally friendly, Microwave, Catalysis
Abstract

An inexpensive and environment friendly green reusable heterogeneous catalytic system copper nanoparticles on cellulose template/H2O—CH3CN/microwave which oxidizes benzylic alcohols, cinnamyl alcohols, and heteroarylalcohols to the corresponding aldehydes in very short reaction time is reported.

Published
2015

5. ChemInform Abstract: Deprotection of Oximes, Imines, and Azines to the Corresponding Carbonyls Using Cu-Nanoparticles on Cellulose Template as Green Reusable Catalyst

Author

Dipak Kumar Dutta, Diganta Baruah, Pallab Pahari, Ujwal Pratim Saikia, and Dilip Konwar

Subjects
Cu nanoparticles, chemistry.chemical_compound, Chemistry, Yield (chemistry), Microwave irradiation, General Medicine, Cellulose, Nuclear chemistry, Catalysis
Abstract

The deprotection of wide varieties of oximes, imines, and azines to their corresponding carbonyls has been achieved using Cu-nanoparticles on a cellulose template as a reusable catalyst. The reactions were carried out at 80–100 °C using microwave irradiation in water under neutral condition. The catalyst can be reused for several cycles with good to excellent yield.

Published
2015

Catalog

Books, media, physical & digital resources
See catalog results