Hydrogen transfer pathways of the asymmetric reduction of α,β-unsaturated ketone mediated by baker’s yeast
作者:Yuan Chu、Ben Li Zhang、Virginie Silvestre、Jin Pei Cheng
DOI:10.1016/j.bioorg.2006.04.002
日期:2006.6
the quantity of yeast. When the amount of yeast is very large, the enzymes use preferentially certain unidentified substance stored in the yeast cells rather than the added glucose as electrondonor. In this case, the hydrogen transferred by the cofactor is mainly of water origin. When the yeast amount is low, the added glucose is more efficiently used by the enzymes as electrondonor and its hydrogen
Asymmetric synthesis of α-chiral ketones by the reduction of enones with baker's yeast
作者:Yasushi Kawai、Motoko Hayashi、Norihiro Tokitoh
DOI:10.1016/s0957-4166(01)00537-7
日期:2001.11
asymmetric reduction of α,β-unsaturatedketones (enones) having a pyridyl ring affords the corresponding optically active α-substituted ketones (α-chiral ketones) with excellent stereoselectivity. The position of the heteroatom, as well as the bulk of the α-substituent, plays an important role in governing the stereoselectivity in the reduction of a carboncarbon doublebond.