Preparation and Catalytic Evaluation of a Palladium Catalyst Deposited over Two‐Dimensional Zeolite ITQ‐2 Modified with N‐Donor Groups

Abstract

Abstract.Two-dimensional zeolite ITQ-2 was reacted successively with (3-chloropropyl)triethoxysilane, 2-(N,N-diethylamino)ethylamine, and ammonia to give a support bearing the ϵSi(CH 2 ) 3 NHCH 2 CH 2 NEt 2 groups at the surface. Subsequent treatment with palladium(II) acetate afforded an immobilized palladium catalyst 3, which was tested in the Heck coupling of n-butyl acrylate with bromobenzene to give n-butyl cinnamate (4). This (pre)catalyst, which acts as a source of active metal species for the reaction occurring in the liquid phase, showed good activity in N,N-dimethylformamide and N,N-dimethylacetamide at 150°C. Reaction tests with different