oa South African Journal of Chemistry - Nitration of substituted phenols by different efficient heterogeneous systems
|Article Title||Nitration of substituted phenols by different efficient heterogeneous systems|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Author||Davood Habibi, Mohammad Ali Zolfigol, Morteza Shiri and Abdolmajid Sedaghat|
|Publication Date||Jan 2006|
|Pages||93 - 96|
|Keyword(s)||Aluminum hydrogen sulphate, Nitration, Nitrophenols, Oxalic acid dihydrate, Silica sulphuric acid, Sodium hydrogen sulphate, Sodium nitrate and Wet SiO2|
Nitration of substituted phenols were carried out by the mixture of sodium nitrite and wet SiO2 (50% w/w) in the presence of four different efficient heterogeneous systems: 1) oxalic acid dihydrate (I), 2) sodium hydrogen sulphate (II), 3) aluminum hydrogen sulphate (III) and 4) silica sulphuric acid (IV) in CH2Cl2 at room temperature and high yields. Optimum conditions for theses systems and the regioselectivities of the reactions are reported.
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