Enantioselective, Catalytic One‐Pot Synthesis of
<i>γ</i>
‐Butyrolactone‐Based Fragrances
作者:Ceyda Kumru、Thomas Classen、Jörg Pietruszka
DOI:10.1002/cctc.201801040
日期:2018.11.7
Herein the preparative (1 g scale), stereoselective syntheses of various alkyl‐substituted γ‐butyrolactone fragrances 1 is described. The α,β‐unsaturated γ‐keto esters 2 as starting materials were synthesized by a Horner‐Wadsworth‐Emmons reaction and are further reduced by an ene reductase and alcohol dehydrogenase in a one‐pot enzyme cascade to nine desired γ‐butyrolactones 1, among them whisky (1 c)
Platinum/Copper Dual‐Catalyzed Asymmetric Vinylogous Addition Reactions for the Synthesis of Functionalized Indoles
作者:Qingdong Hu、Chang Guo
DOI:10.1002/anie.202305638
日期:2023.7.24
An efficient platinum/copper dual-catalyzed asymmetric vinylogous addition reaction has been developed. This efficient process provides a novel approach for the asymmetricsynthesis of highly valuable indoles bearing a quaternary stereocenter with excellent enantioselectivity (up to 99 % ee).