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Synthesis of a series of new ruthenium organometallic complexes derived from pyridine‐imine ligands and their catalytic activity in oxidation of secondary alcohols
Author(s) -
Hao Zhiqiang,
Li Ying,
Li Chen,
Wu Ruitao,
Ma Zhihong,
Li Suzhen,
Han Zhangang,
Zheng Xuezhong,
Lin Jin
Publication year - 2019
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.4750
Subject(s) - chemistry , ruthenium , pyridine , catalysis , imine , toluene , medicinal chemistry , organometallic chemistry , crystal structure , stereochemistry , organic chemistry
Reactions of pyridine imines [C 5 H 4 N‐2‐C(H) = N‐C 6 H 4 ‐R] [R = H (1), CH 3 (2), OMe (3), CF 3 (4), Cl (5), Br (6)] with Ru 3 (CO) 12 in refluxing toluene gave the corresponding dinuclear ruthenium carbonyl complexes of the type { μ ‐ η 2 ‐CH[(2‐C 5 H 4 N)(N‐C 6 H 4 ‐R)]} 2 Ru 2 (CO) 4 ( μ ‐CO) [R = H (7); CH 3 (8); OMe (9); CF 3 (10); Cl (11); Br (12)]. All six novel complexes were separated by chromatography, and fully characterized by elemental analysis, IR, NMR spectroscopy. Molecular structures of 7, 10, 11, and 12 were determined by X‐ray crystal diffraction. Further, the catalytic performance of these complexes was also tested. The combination of { μ ‐ η 2 ‐CH[(2‐C 5 H 4 N)(N‐C 6 H 4 ‐R)]} 2 Ru 2 (CO) 4 ( μ ‐CO) and NMO afforded an efficient catalytic system for the oxidation of a variety secondary alcohols.