Biochemical syntheses O 0035Asymmetric anti-Prelog Reduction of Ketones Catalyzed by Paracoccus pantotrophus and Comamonas sp. Cells via Hydrogen Transfer. -Isopropanol is used as a hydrogen source for the conversion of a wide range of cyclic and linear, aromatic and aliphatic ketones to the corresponding alcohols. Ketones containing α-ester groups are hydrogenated selectively [cf. (Xb)]. -(LAVANDERA, I.; HOELLER, B.; KERN, A.; ELLMER, U.; GLIEDER, A.; DE WILDEMAN, S.; KROUTIL*, W.; Tetrahedron: