Kinetic resolution of a series of cyclopentene-1,4-diol derivatives has been successfully achieved with enantiomeric excess up to 99.4% and a kf/ks ratio of 55 by a rhodium-catalyzed redox-isomerization reaction in a noncoordinating solvent.
在非配位溶剂中,通过铑催化的氧化还原异构化反应,已成功实现了一系列环戊烯-1,4-二醇衍生物的动力学拆分,对映体过量高达99.4%,k f / k s比为55。
Regiocontrol in MnIII-Mediated Oxidative Heterobicyclizations: Access to the Core Skeletons of Oroidin Dimers
作者:Xianghui Tan、Chuo Chen
DOI:10.1002/anie.200601208
日期:2006.6.26
Ring Expansive Routes to Quinolizidine Alkaloids: Formal Synthesis of (−)-Lasubine II
synthesis is reported. The approach involves a conjugate reduction/alkylation sequence carried out on triisopropylsilyl-protected (S)-4-(-)-hydroxycyclopentenone, the formation of the quinolizidone ring system through nitrogen ring expansion, and the addition of an arylmetallic species to the resulting lactam. This work resulted in the preparation of 2-epi-lasubine II and a formal synthesis of lasubine
Chemoenzymatic routes to cyclopentenols: the role of protecting groups on stereo- and enantioselectivity
作者:Simon Specklin、Anna Dikova、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1016/j.tetlet.2014.10.105
日期:2014.12
lyloxycyclopent-2-en-1-one was very efficiently obtained from diacetate of cis-cyclopent-2-en-1,3-diol using enzymatic desymmetrization with CAL-B. In these sequences, TIPS proved to be the best protecting group.