“…Catalyst 4 is particularly one of the most efficient Ru (II) complexes used for racemization in chemoenzymatic dynamic kinetic resolutions (Csjernyik et al, 2004;Martín-Matute et al, 2004. This catalyst is activated by bases such as t-BuOK and is able to quickly racemize alcohols under mild temperatures in the presence of lipases, so that it has been employed in the DKR of several alcohols Bogár et al, 2007aBogár et al, , 2007bCsjernyik et al, 2004;Edin et al, 2006;Ema et al, 2012;Engstrom et al, 2011;Fransson et al, 2006;Johnston et al, 2010;S. Kim et al, 2013;Krumlinde et al, 2009;Leijondahl et al, 2009;Lihammar et al, 2011Lihammar et al, , 2013Mangas-Sánchez et al, 2009;Martín-Matute et al, 2004, 2006Norinder et al, 2007;Shuklov et al, 2014;Solarte et al, 2014;Träff et al, 2008Träff et al, , 2011Warner et al, 2012), including the large-scale DKR of 1-phenylethanol to give (R)-1-phenylethanol (Bogár et al, 2007a).…”