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Selective Acceptorless Conversion of Primary Alcohols to Acetals and Dihydrogen Catalyzed by the Ruthenium(II) Complex Ru(PPh 3 ) 2 (NCCH 3 ) 2 (SO 4 )
Author(s) -
Kossoy Elizaveta,
DiskinPosner Yael,
Leitus Gregory,
Milstein David
Publication year - 2012
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.201100672
Subject(s) - ruthenium , chemistry , triphenylphosphine , nitrile , acetonitrile , medicinal chemistry , alcohol , catalysis , molecule , stereochemistry , organic chemistry
Abstract The complex bis(acetonitrile)bis(triphenylphosphine)ruthenium(II) sulfate [Ru(PPh 3 ) 2 (NCCH 3 ) 2 (SO 4 )], fully characterized spectroscopically and by a single crystal X‐ray study, catalyzes at 110 °C the direct transformation of primary alcohols to the corresponding acetals with liberation of molecular hydrogen. The formation of acetals proceeds via direct substitution of the hydroxy group of the hemiacetal intermediate by an alcohol molecule. The closely related bis(triphenylphosphine)ruthenium(II) acetate [Ru(PPh 3 ) 2 (OAc) 2 ] catalyzes the conversion of primary alcohols to the corresponding esters rather than acetals.