Stereochemical Control in Microbial Reduction. 30. Reduction of Alkyl 2-Oxo-4-phenylbutyrate as Precursors of Angiotensin Converting Enzyme (ACE) Inhibitors
作者:Duc Hai Dao、Yasushi Kawai、Kouichi Hida、Sander Hornes、Kaoru Nakamura、Atsuyoshi Ohno、Mutsuo Okamura、Takeshi Akasaka
DOI:10.1246/bcsj.71.425
日期:1998.2
corresponding alkyl (R)-2-hydroxy-4-phenylbutyrates, versatile chiral buildingblocks in organic synthesis, in high chemical yield (80—90%) with excellent stereoselectivity ( > 90%ee). The reaction has been run in aqueous diethyl ether at 30 °C for 24 h under the catalysis of bakers’ yeast (Saccharomyces cerevisiae) which was preincubated for 6 h in the presence of phenacyl chloride. The amount of
Chiral Sulfinamide-Olefin Ligands: Switchable Selectivity in Rhodium-Catalyzed Asymmetric 1,2-Addition of Arylboronic Acids to Aliphatic<i>α</i>-Ketoesters
作者:Ting-Shun Zhu、Ming-Hua Xu
DOI:10.1002/cjoc.201300063
日期:2013.3
es have been developed as efficient novel ligands for the rhodium‐catalyzed enantioselective 1,2‐addition of arylboronic acids to challenging aliphatic α‐ketoesters. By employing the linear or branched sulfinamide‐olefin ligands, interesting enantioselectivity as well as regioselectivity reversal in the related asymmetricadditions were observed.