ChemInform Abstract: CuO Nanoparticles Catalyzed C—N, C—O, and C—S Cross‐Coupling Reactions: Scope and Mechanism.

Jammi, Suribabu; Sakthivel, S.; Rout, Laxmidhar; Mukherjee, Tathagata; Mandal, Santu; Mitra, Raja; Saha, Prasenjit; Punniyamurthy, Tharmalingam

doi:10.1002/chin.200930033

Cited by 2 publications

(2 citation statements)

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“…Aromatic carbons of lignin showed a very low signal between 102-156 ppm compared to C10-C16 aliphatic carbons. NMR signals of etherified lignin samples reflected previously reported O-alkyl phenolic compounds and thus further confirmed the successful etherification of lignin [45,46], as suggested also by high solubility in low-polarity solvents, such as chloroform and diethylether. In 13 C NMR spectra, the methyl carbon of C10-C16 chain units appeared around 14.4 ppm (Figure 4).…”

Section: Characterization Of Ligninssupporting

confidence: 83%

Melt Stable Functionalized Organosolv and Kraft Lignin Thermoplastic

2020

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A shift towards an economically viable biomass biorefinery concept requires the use of all biomass fractions (cellulose, hemicellulose, and lignin) for the production of high added-value products. As lignin is often underutilized, the establishment of lignin valorization routes is highly important. In-house produced organosolv as well as commercial Kraft lignin were used in this study. The aim of the current work was to make a comparative study of thermoplastic biomaterials from two different types of lignins. Native lignins were alkylate with two different alkyl iodides to produce ether-functionalized lignins. Successful etherification was verified by FT-IR spectroscopy, changes in the molecular weight of lignin, as well as 13C and 1H Nuclear Magnetic Resonance (NMR). The thermal stability of etherified lignin samples was considerably improved with the T2% of organosolv to increase from 143 °C to up to 213 °C and of Kraft lignin from 133 °C to up to 168 °C, and glass transition temperature was observed. The present study shows that etherification of both organosolv and Kraft lignin with alkyl halides can produce lignin thermoplastic biomaterials with low glass transition temperature. The length of the alkyl chain affects thermal stability as well as other thermal properties.

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Section: Characterization Of Ligninssupporting

confidence: 83%

Melt Stable Functionalized Organosolv and Kraft Lignin Thermoplastic

2020

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“…Another flamboyant category of EAOC is 'organo click reactions' in which electron-rich olefins such as enamines generated in situ would be treated with azides in the presence of organo catalysts such as secondary or tertiary amines. 37 In continuation of our previous contributions in azideolefin cycloaddition of electron-deficient olefins and organic azides using CuO nanoparticles, [38][39][40][41] we were prompted to examine the azide-olefin cycloaddition on bromoalkenes and organic azides. Our literature perusal on this aspect revealed the palladium-catalyzed synthesis of 1H -1,2,3-triazoles from sodium azide and alkenyl bromides (Eq.…”

Section: * For Correspondencementioning

confidence: 99%