- Bio-heterogeneous Cu(0)NC@PHA for n-aryl/alkylation at room temperature
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A pure cellulose was derived from waste fibre and it was chemically modified to a hydroxamic acid ligand. The poly(hydroxamic acid) was treated with an aqueous copper solution to afford the greenish stable five-membered copper complex; namely Cu(II)@PHA. Further, the Cu(II)@PHA was treated with a reducing agent hydrazine hydride to give brown colour cellulose supported copper nanocomplex (Cu(0)NC@PHA). The Cu(0)NC@PHA was characterised by ATR-FTIR, FE-SEM & EDS, TEM, ICP-OES, TGA, XRD and XPS analyses. The cellulose-based Cu(0)NC@PHA was used for the n-aryl/alkylation (Michael addition) reaction with a variety of α,β-unsaturated Michael acceptors to produce the corresponding n-aryl/alkyl products with an excellent yield at room temperature. The Cu(0)NC@PHA showed extraordinary stability and it was easily filtered out from the reaction mixture and may potentially recycled up to five times without loss of its original catalytic ability.
- Jian Fui, Choong,Lutfor Rahman, Md,Musta, Baba,Sani Sarjadi, Mohd,Sarkar, Shaheen M.,Xin Ting, Tang
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- "On-water" conjugate additions of anilines
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The conjugate addition of anilines onto unsaturated ketones, esters and N-acylpyrroles was investigated. Based on a recently proposed explanation for the phenomenon of on-water catalysis, operationally simple and mild reaction conditions for effecting these addition reactions have been developed. The success of these additions provides further support for the acid-catalysed nature of on-water chemistry.
- Phippen, Christopher B. W.,Beattie, James K.,McErlean, Christopher S. P.
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supporting information; experimental part
p. 8234 - 8236
(2010/12/20)
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- SYNTHESIS AND TRANSFORMATIONS OF 1-(4-HYDROXYPHENYL)DIHYDROURACILS
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N-(4-hydroxyphenyl)-β-alanine and its methyl derivatives, as well as p-hydroxy-phenylamino-β,β'-dipropionic acid, were obtained by the reaction of p-aminophenol with methyl acrylate and acrylic, methacrylic, and crotonic acids.The β-alanines were converte
- Baltrushis, R. S.,Beresnevichyus, Z. I. G.,Mitskyavichyus, V. Yu.
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p. 1089 - 1095
(2007/10/02)
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