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Ruthenium( II ) Complexes Bearing Schiff Base Ligands for Efficient Acceptorless Dehydrogenation of Secondary Alcohols †
Author(s) -
Hao Zhiqiang,
Liu Kang,
Feng Qi,
Dong Qing,
Ma Dongzhu,
Han Zhangang,
Lu GuoLiang,
Lin Jin
Publication year - 2021
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.202000363
Subject(s) - chemistry , ruthenium , triethylamine , dehydrogenation , schiff base , catalysis , medicinal chemistry , nuclear magnetic resonance spectroscopy , stereochemistry , organic chemistry
Four ruthenium(II) complexes 1—4 [RN=CH‐(2,4‐( t Bu) 2 C 6 H 2 O)]RuH(PPh 3 ) 2 (CO) (R = C 6 H 5 , 1; R = 4‐MeC 6 H 4 , 2; R = 4‐ClC 6 H 4 , 3; R = 4‐BrC 6 H 4 , 4) bearing Schiff base ligands were prepared by treating RuHClCO(PPh 3 ) 3 with RN=CH‐(2,4‐( t Bu) 2 C 6 H 2 OH (L1—L4) in the presence of triethylamine. Their structures were fully characterized by elemental analysis, IR, NMR spectroscopy and X‐ray crystallography. These Ru(II) complexes exhibit high catalytic performance and good functional‐group compatibility in the acceptorless dehydrogenation of secondary alcohols, affording the corresponding ketones in 82%—94% yields.