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Retracted : Catalytic activity of Fe(II) and Cu(II) PNP pincer complexes for Suzuki coupling reaction
Author(s) -
Kumar Lolakshi Mahesh,
Ansari Rasheeda M.,
Bhat Badekai Ramachandra
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4054
Subject(s) - chemistry , pincer movement , catalysis , phenylboronic acid , copper , coupling reaction , solvent , pyridine , polymer chemistry , medicinal chemistry , diamine , suzuki reaction , schiff base , selectivity , metal , inorganic chemistry , nuclear chemistry , organic chemistry , palladium
Iron and copper PNP pincer complexes of the type [Fe(L)SO 4 ] and [Cu(L)OCOCH 3 ] are reported and represented as C‐1 and C‐2 catalyst. Both the complexes were synthesized using bis(diphenylphosphino)pyridine‐2,6‐diamine [L], and salts of ‘Fe’ and ‘Cu’ by direct coordination method. The as synthesized complexes were characterized using FTIR, UV–Vis, mass analysis and TGA. The effect of reaction time, catalyst load, solvent and base on the reaction between phenylboronic acid and para substituted bromobenzenes in the presence of the catalysts were investigated for evaluating the catalytic efficiency of the complexes. The results obtained highlight the enhanced C‐C coupling reactions with the use of 0.4 mol% of the catalyst C‐1 in 14 h and 0.6 mol% of C‐2 in 16 h respectively with Cs 2 CO 3 base and ACN as solvent media. Of the two complexes reported, C‐1 with iron as catalytically active metal is more stable and active towards coupling which is reflected in its better coupling yields in lesser reaction time compared to copper bearing C‐2 complex.