Cu(I) metal organic framework catalyzed C-C and C-N coupling reactions

DABCO (1,4-diazabicyclo[2.2.2]octane) based Cu(I) metal organic framework (here after represented as Cu(I)-MOF) catalyzed Sonogashira cross-coupling reaction of iodobenzene and phenylacetylene was conducted smoothly to afford diphenylacetylene in excellent yield under N-2 atmosphere. For comparative study, piperidine based Cu(I) clusters were also investigated. Among these catalysts, Cu(I)-MOF exhibited higher activity with good selectivity for the C-C cross-coupled product. Cu(I) catalysts investigated in this study exhibited similar activity in the C-C homo-coupling reaction of phenylacetylene in O-2 atmosphere. Application of these catalysts was extended in the C-N coupling reactions between phenylboronic acid and aromatic/aliphatic/heterocyclic amines. Cu(I)-MOF can be readily recovered from the reaction mixture and reused for several cycles without loss in the catalytic activity. (C) 2014 Elsevier Ltd. All rights reserved.