Supported on Montmorillonite

Kenawy 64) immobilized ammonium and phosphonium peripheral functionalized dendritic branches on a montmorillonite supported chloromethylstyrene/methyl methacrylate copolymer (74-75). These polymer/montmorillonite-supported dendrimers were used as phase transfer catalysts (PTC) for the nucleophilic substitution reaction between -butyl bromide and thiocyanate, cyanide, and nitrite anions in a toluene or a benzene/water system. These PT catalysts could be recycled by filtration of the functionalized montmorillonite from the reaction mixture. Generally, 

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Another possible alternative oxidant that has recently been investigated is an Fe(VI) species, potassium ferrate, K2Fe04, supported on montmorillonite clay.14 This reagent gives clean, high-yielding oxidation of benzylic and allylic alcohols, but saturated alcohols are less reactive. 

Certain manganese porphyrins adsorbed on silica or alumina, or intercalated in different mineral matrices such as montmorillonite, are also very efficient in alkane hydroxylation.150 151 Alcohol yields and alcohol ketone ratios are remarkably higher than those obtained with the corresponding soluble manganese porphyrins. Manganese tetra(4-Al-methylpyridiniumyl)porphyrin supported on montmorillonite, for instance, is efficient in the hydroxylation of compounds of low reactivity such as n-pentane and n-heptane.151... 

Ammonium chlorochromate supported on montmorillonite K-10 (2.6 mmol) was mixed with the neat oxime (1.6 mmol) in a small beaker. The beaker was placed inside a microwave oven operating at full power (900 W). After completion of die reaction (monitored by TLC), the product was extracted with CH2C12. The filtrate was evaporated to dryness, and the residue was passed through a small bed of silica gel to afford die corresponding carbonyl compounds after removal of the solvent. 

Oxidation of a.-methylpyrroles. Treatment of the pyrrole 1 with TTN supported on montmorillonite clay effects the expected oxidative rearrangement of the 3-acetyl group... 

Condensation of dimethyl urea, paraformaldehyde, and primary amines supported on montmorillonite Kio under MWI in dry media gave triazinones 778 (R = = Me, Z = O) in 71-84% yields within 6 min (Scheme 150) (99JCR(S)392). 

Zhang, Z., Guo, C.-Y., Cui, N., Ke, Y, and Hu, Y. 2004. Preparation of linear low density polyethylene by in situ copolymerization of ethylene with Zr supported on montmorillonite/ Fe/methylaluminoxane catalyst system. Journal of Applied Polymer Science 94 1690-1696. 

MoMnd. Small manganese oxidic nano-particles supported on montmorillonite. 

Three component condensation of N,N -dimethyl urea, paraformaldehyde and primary amines using montmorillonite K10 clay in dry media under microwave irradiation (MWI) lead to the formation of triazones whereas condensation of dimethyl urea and paraformaldehyde supported on montmorillonite KIO using MWI gave 4-oxo-oxadiazinone (Scheme 82)7 ... 

Shin S-YA, Simon LC, Soares JBP, Scholz G, McKenna TFL (2009) Gas-phase polymerization with transition metal catalysts supported on montmorillonite - a particle morphological study. Macromol Symp 285(1) 64—73... 

The condensation of EAA with phenol for the preparation of hymecromone using a catalyst of Bronsted acidity, 12-tungstophosphoric acid supported on montmorillonite KIO (PWA/montmoriUonite-KlO) in solventless system in 69% yield was reported by B. Vijayakumar and G. Ranga Rao (12MI233). 

Choudhary etal. reported that their InCla catalyst supported on montmorillonite-KIO [143] or Si-MCM-41 [144] for the acetylation of t-butanol using acetic anhydride was also met with high conversion to the ester, with minimal amounts of isobutylene observed. Salavati-Niasari et al. also reported similar results with InCla supported... 

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