Enantioselective Synthesis and Absolute Configuration Assignment of Gabosine O. Synthesis of (+)- and (−)-Gabosine N and (+)- and (−)-Epigabosines N and O
作者:Ramón Alibés、Pau Bayón、Pedro de March、Marta Figueredo、Josep Font、Georgina Marjanet
DOI:10.1021/ol060173e
日期:2006.4.1
approach to the synthesis of gabosines and other related carba-sugars starting from a masked p-benzoquinone has been designed. The enantioselective acetylation of the hydroxyketal 2 provides a practical entry to either enantiomer of the target products. The strategy has been applied to the synthesis of (+)- and (-)-gabosines N and O and (+)- and (-)-epigabosines N and O. The absoluteconfiguration of natural
An efficient approach to either enantiomer of trans-cyclohex-2-ene-1,4-diol
作者:Ramon Alibés、Pedro de March、Marta Figueredo、Josep Font、Georgina Marjanet
DOI:10.1016/j.tetasy.2004.02.003
日期:2004.4
(1S,4S)-Cyclohex-2-ene- 1,4-diol has been synthesised starting from a chiral p-benzoquinone equivalent. The sequence can be equally applied to the preparation of the (1R,4R)-enantiomer of the target diol. (C) 2004 Elsevier Ltd. All rights reserved.
An Efficient Protocol for the Enantioselective Preparation of a Key Polyfunctionalized Cyclohexane. New Access to (<i>R</i>)- and (<i>S</i>)-4-Hydroxy-2-cyclohexenone and (<i>R</i>)- and (<i>S</i>)-<i>trans</i>-Cyclohex-2-ene-1,4-diol
作者:Pau Bayón、Georgina Marjanet、Gladis Toribio、Ramon Alibés、Pere de March、Marta Figueredo、Josep Font
DOI:10.1021/jo800107h
日期:2008.5.1
accessible raw materials such as p-methoxyphenol, ethylene glycol, and thiophenol, a protocol has been developed to prepare multigram quantities of the polyfunctionalized cyclohexane (±)-7. A highly efficient resolution of (±)-7 has been achieved through enantioselective acetylation catalyzed by Candida antarctica lipase B. Straightforward and enantioselective syntheses of 4-hydroxy-2-cyclohexenone, 1