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ARTICLE This journal isAnchored palladium (II) in functionalized MCM-41 mesoporous silica was prepared and used as an efficient, recoverable and thermally stable heterogeneous nano catalyst for C-C, C-O and C-N bond formation in cross-coupling reactions in the presence of Ph 3 SnCl. MCM-41 was prepared trough hydrothermal synthesis using tetraethyl orthosilicate (Si(OC 2 H 5 ) 4 ) as silica source and cetyltrimethylammonium bromide (CTAB) as a template. The structure of functionalized MCM-41 was studied by FT-IR, XRD, SEM, TEM, TGA, EDS, ICP and BET techniques.

The present work describes the use of Pd(0)-S-propyl-2-aminobenzothioate Complex immobilized onto functionalized magnetic nanoporous MCM-41(Fe 3 O 4 @MCM-41@Pd-SPATB) as efficient and recyclable nano-organometallic catalyst for C-C bond formation between various aryl halides with phenylboronic acid (Suzuki reaction), aryl halides with triphenyltin chloride (Stille reaction), and aryl halides with n-butyl acrylate (Heck reaction). All the reactions were carried out in PEG-400 as green solvent with short reaction time and good to excellent yields. This catalyst was characterized by FT-IR spectroscopy, XRD, TGA, VSM, ICP-OES, TEM, EDX and SEM techniques. Ease of operation, high efficiency, recovery and reusability for five continuous cycles without significant loss of its catalytic activities or metal leaching are the noteworthy features of the currently employed heterogeneous catalytic system.

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