作者:M. Mark midland、Alfonso tramontano、Aleksander kazubski、Richard S. graham、David J.S. tsai、Daniel B. cardin
DOI:10.1016/s0040-4020(01)82422-4
日期:1984.1
Propargyl ketones are readily reduced by the asymmetric reducing agent B-3-pinanyl-9- borabicyclo[3.3.1]-nonane (Alpine-borane). The reagent prepared from (+)-α-pinene and 9-BBN provides the R enantiomer while the S enantiomer can be obtained from (-)-α-pinene. Alternatively the S enantiomer can be prepared from the reagent derived from 9-BBN and the benzyl ether of nopol (6,6-dimethyl-bicyclo[3.11
One-Pot Deracemization of<i>sec</i>-Alcohols: Enantioconvergent Enzymatic Hydrolysis of Alkyl Sulfates Using Stereocomplementary Sulfatases
作者:Markus Schober、Michael Toesch、Tanja Knaus、Gernot A. Strohmeier、Bert van Loo、Michael Fuchs、Florian Hollfelder、Peter Macheroux、Kurt Faber
DOI:10.1002/anie.201209946
日期:2013.3.11
Hand in hand: The title transformation was achieved using a pair of sulfatases acting through inversion and retention of configuration on opposite substrate enantiomers. Using Pseudomonas aeruginosa arylsulfatase PAS with alkylsulfatase PISA1 in one‐pot leads to sec‐alcohols (80 to >99 % conversion) with 91 to greater than 99 % ee.