Scalable and sustainable electrochemical allylic C–H oxidation
作者:Evan J. Horn、Brandon R. Rosen、Yong Chen、Jiaze Tang、Ke Chen、Martin D. Eastgate、Phil S. Baran
DOI:10.1038/nature17431
日期:2016.5.5
transformation, the majority of conditions still use highly toxic reagents (based around toxic elements such as chromium or selenium) or expensive catalysts (such as palladium or rhodium). These requirements are problematic in industrial settings; currently, no scalable and sustainable solution to allylicoxidation exists. This oxidation strategy is therefore rarely used for large-scale synthetic applications
Total Synthesis of (−)‐Rotundone and (−)‐
<i>epi</i>
‐Rotundone from Monoterpene Precursors
作者:Fabian Rüthi、Fridtjof Schröder
DOI:10.1002/hlca.202000129
日期:2020.11
gave (−)‐rotundone by Nazarov cyclization of a precursor 13a. Diastereomer (−)‐epi‐rotundone was separated from (−)‐rotundone chromatographically. An alternative route from rac‐citronellal provided a diastereomer mixture of racemic Nazarov precursor 13 through a TRIP‐catalyzed intramolecular aldolization, thus indicating that the Nazarov cyclization precursor 13a is in principle accessible from (−)‐(S)‐citronellal
[EN] 1-HYDROXY-OCTAHYDROAZULENES AS FRAGRANCES<br/>[FR] 1-HYDROXY-OCTAHYDROAZULÈNES EN TANT QUE PARFUMS
申请人:GIVAUDAN SA
公开号:WO2012001018A1
公开(公告)日:2012-01-05
(3S,5R)-3,8-dimethyl-5-(prop-1-en-2-yl)-octahydroazulen-1-ols, their use as flavour or fragrance ingredient, and a process of their production by oxidation in the presence of laccase.
Effective analysis of rotundone at below-threshold levels in red and white wines using solid-phase microextraction gas chromatography/tandem mass spectrometry
of rotundoneusingtandemmassspectrometry in multiple reaction monitoring (MRM) mode with d5‐rotundone as internal standard. With limits of detection (LODs) of 1.5 ng/L in whitewine and 2.0 ng/L in redwine, intraday repeatability CV values of 6% and 5% at 50 ng/L and 500 ng/L and interday repeatability CV values of 13% and 6% at 50 ng/L and 500 ng/L, respectively, the improved protocol provides
(3S,5R)-3,8-dimethyl-5-(prop-1-en-2-yl)-octahydroazulen-1-ols, their use as flavor or fragrance ingredient, and a process of their production by oxidation in the presence of laccase.