Clay-Supported Copper(II) and Iron(III) Nitrates: Novel Multi-Purpose Reagents for Organic Synthesis

Preparation of Poly(oxybutyleneoxymaleoyl) Catalyzed by a Proton Exchanged Montmorillonite Clay

“…These acid-treated and cation exchanged clays can be regarded simply as solid acids that act as heterogeneous catalysts, with all of the advantages resulting from the easy removal of the catalyst from the product(s). Acid-treated clays, because of their increased surface area and swelling properties, have also been widely used as solid supports for inorganic reagents such as potassium permanganate [10], thallium(III) nitrate [11] and both copper(II) and iron(III) nitrates [12]. The ion-exchanged clays have mostly Brönsted acidity in the interlamellar zone and thus are characterised by promoting acidcatalysed reactions, often of a bimolecular type, between protonated and neighbouring unprotonated reactants [13].…”

An Acid Exchanged Montmorillonite Clay-Catalyzed Synthesis of Polyepichlorhydrin

“…Acid-treated clays, because of their increased surface area and swelling properties, have also been widely used as solid supports for inorganic reagents such as potassium permanganate [10], thallium(III) nitrate [11] and both copper(II) and iron(III) nitrates [12].…”

Nitration of phenolic compounds by metal salts impregnated Yb-Mo-montmorillonite KSF

“…1 Nitration of aromatic compounds is one of the most important industrial processes [2][3][4][5][6][7][8][9] and is the subject of a large body of literature. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] In our laboratory, we have been seeking out a more practical process for the nitration of substituted phenols using stoichiometric or a small excess amount of nitric acid under mild conditions because the development of environmentally friendly practical procedures for the nitration of aromatic compounds is highly desirable. [24][25][26][27] However, in our previously reported nitration processes for phenolic compounds, 500 mg of KSF for 1.0 mmol of phenolic compounds must be required to give the nitrated products in good yields.…”