Palladium anchored on amine-functionalized K10 as an efficient, heterogeneous and reusable catalyst for carbonylative Sonogashira reaction
作者： Sujit P. Chavan , G.Bishwa Bidita Varadwaj , Kulamani Parida , Bhalchandra M. Bhanage
DOI: 10.1016/J.APCATA.2015.09.019
关键词: Electrophile 、 Heterogeneous catalysis 、 Aryl 、 Phosphine 、 Moiety 、 Chemistry 、 Catalysis 、 Combinatorial chemistry 、 Sonogashira coupling 、 Organic chemistry 、 Palladium
摘要: Abstract The present work describes the immobilization of palladium chloride (II) on amine functionalized K10 support and its application toward carbonylative Sonogashira reactions. various catalyst characterization techniques revealed successful grafting APTES moiety clay surface through covalent bonding Pd with NH 2 groups APTES@K10 co-ordinate bonding. immobilized was successively applied for copper phosphine free reaction aryl hetero iodides terminal alkynes. To our delight, electron withdrawing halides can be efficiently utilized as an electrophiles giving higher selectivity carbonylated products. Moreover, dibenzoylmethane which is a potential synthetic intermediate in organic transformation has been also synthesized using this protocol. Recovery by simple filtration reuse up to four consecutive cycles ensure robustness catalytic
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