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A Versatile and High‐Yield Route to Active and Well‐Defined Catalysts [Ru(bisphosphane)(H)(solvent) 3 ](BF 4 )
Author(s) -
Wiles Jason A.,
Bergens Steven H.,
Vanhessche Koenraad P. M.,
Dobbs Daniel A.,
Rautenstrauch Valentin
Publication year - 2001
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20010302)40:5<914::aid-anie914>3.0.co;2-#
Subject(s) - yield (engineering) , catalysis , solvent , ruthenium , chemistry , combinatorial chemistry , nanotechnology , organic chemistry , materials science , metallurgy
Simple and efficient : Protonation of [Ru(1,2:5,6‐ η ‐cod)( η 6 ‐cot)] (cod=1,5‐cyclooctadiene, cot=1,3,5‐cyclooctatriene) with HBF 4 ⋅Et 2 O and then reaction with chiral bisphosphane ligands ( $_{\rm PP}^{\frown }$ =Me‐DuPHOS, BINAP, Tol‐BINAP, JOSIPHOS) affords the corresponding [Ru( $_{\rm PP}^{\frown }$ )(H)( η 6 ‐cot)] + or [Ru( $_{\rm PP}^{\frown }$ )(1,2,3,4,5‐ η ‐C 8 H 11 ′)] + (C 8 H 11 ′=2,4‐cyclooctadienyl; see scheme). Exposure of these cations to H 2 in solvents (sol) such as acetone, methanol, and THF affords [Ru( $_{\rm PP}^{\frown }$ )(H)(sol) 3 ] + , which are catalysts for (amongst other things) enantioselective hydrogenations of alkenes.