Phosphonate, zeolite-like

Copper(n) Phosphonates - p-Cu (CH3P03), an Original 3-Dimensional Structure with a Channel-Type Arrangement/norg. Chem. 1994, 55, 4885 Drumel, S. Janvier, P Demand, D. Bujoli, B., Synthesis and Crystal-Structure of Zn(03PC2H4NH2), the First Functionalized Zeolite-Like Phosphonate / Chem. Soc. Chem. Commun. 1995, 1051 Drumel, S. Janvier, P Barboux, P Bujoli-Doeuff, M. Bujoli, B., Synthesis, Structure, and Reactivity of Some Functionalized Zinc and Copper(ll) Phosphonates Inorg. Chem. 1995,34, 148. 

Although the structural chemistry of molybdenum and vanadium phosphates is very diverse these compounds seem to be prototypes for open framework transition and main group metal phosphates. Recent results have shown that zeolite-like compounds like zinc/cobalt phosphates [731, indium phosphates [74], nickel/aluminum phosphates [75], cobalt/boron phosphates [76], manganese and cobalt phosphonates with giant 44-membered rings forming ellipsoidal cavities [77] can be synthesized. All these examples show that the diverse chemistry of octahedral-tetrahedral framework structures is a vast field where... 

More and more, solid catalysts like zeolites, clays or resins are used instead of traditional catalysts. Thus, zeolites are good catalysts for the acylation of non-heterocyclic aromatic compounds, both in the gas phase [2] and in the liquid phase [3]. The acylation of thiophene and of furan can also be carried out in the gas phase with M-5 catalysts [4]. Lasdo and co-woikers have shown that modified clays like montmorillonite doped with ZnCl2 can catalyse the reactioi of arenes with substituted benzoyle chlorides in good yields [5] (70 to 100%). Delmas and co-workers have reported the acylation of furan by carboxylic acids with nafion-H [6] (sulfonic resin) and duolite [7] (ion exchanged phosphonic resin). One of the advantages of these catalysts is the safety of environment. Actually, the use of homogeneous catalysts causes problems of corrosion, waste and troublesome workups [8,9]. 

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