124190-50-7Relevant articles and documents
Stereo-complementary two-step cascades using a two-enzyme system leading to enantiopure epoxides
Seisser, Birgit,Lavandera, Ivan,Faber, Kurt,Spelberg, Jeffrey H. Lutje,Kroutil, Wolfgang
, p. 1399 - 1404 (2007)
A novel one-pot, two-step, two-enzyme cascade is described. Pro-chiral α-chloro ketones are stereoselectively reduced to the corresponding halohydrins as an intermediate by a biocatalytic hydrogen transfer process. The intermediate is transformed to the corresponding epoxide by a non-enantioselective halohydrin dehalogenase. Thus, by combining a Prelog- or anti-Prelog alcohol dehydrogenase with a non-selective halohydrin dehalogenase, enantiopure (R)- as well as (S)-epoxides were obtained.
Shifting the equilibrium of a biocatalytic cascade synthesis to enantiopure epoxides using anion exchangers
Schrittwieser, Joerg H.,Lavandera, Ivan,Seisser, Birgit,Mautner, Barbara,Lutje Spelberg, Jeffrey H.,Kroutil, Wolfgang
experimental part, p. 483 - 488 (2009/07/25)
Hydroxide-loaded anion exchangers have been successfully employed to shift the equilibrium of a one-pot, two-step, two-enzyme cascade reaction affording enantiopure epoxides starting from prochiral α-chloroketones. The α-chloroketones were asymmetrically reduced employing an alcohol dehydrogenase and then transformed further to the corresponding epoxides employing halohydrin dehalogenases. Each epoxide enantiomer could be obtained with up to 93% conversion in enantiomerically pure form (>99% ee). In contrast to previous studies the amount of hydride donor (2-propanol) could be reduced due to favoured halohydrin formation in the reduction of α-chloroketones.