FeCl<sub>3</sub>-Catalyzed Intramolecular Michael Reaction of Styrenes for the Synthesis of Highly Substituted Indenes
作者:Dattatraya H. Dethe、Ganesh M. Murhade、Sourav Ghosh
DOI:10.1021/acs.joc.5b01071
日期:2015.8.21
An intramolecular FeCl3-catalyzed Michael addition reaction of styrene, a poor nucleophile, onto α,β-unsaturated ketones was developed for the synthesis of highly substituted indene derivatives. The method was further applied to the total synthesis of the sesquiterpene natural products (±)-jungianol and 1-epi-jungianol.
Abstract An investigation of nine representative species of the tribe Mutisieae yielded some new results of chemotaxonomic interest. Some new sesquiterpenes and coumarins have been characterised by spectroscopic methods. 5-Methylcoumarins appear to be characteristic of the tribe.
FeCl<sub>3</sub> Catalyzed Prins-Type Cyclization for the Synthesis of Highly Substituted Indenes: Application to the Total Synthesis of (±)-Jungianol and <i>epi</i>-Jungianol
作者:Dattatraya H. Dethe、Ganesh Murhade
DOI:10.1021/ol3032347
日期:2013.2.1
A novel approach was developed for the synthesis of highly substituted indene derivatives, using an FeCl3 catalyzed Prins-type cyclization reaction which was further applied in the total synthesis of jungianol and epi-jungianol.
Gold Catalysis: Efficient Synthesis and Structural Assignment of Jungianol andepi-Jungianol
作者:A. Stephen K. Hashmi、Li Ding、Jan W. Bats、Peter Fischer、Wolfgang Frey
DOI:10.1002/chem.200305092
日期:2003.9.22
Starting from 2-methylfuran and crotonaldehyde, both jungianol and epi-jungianol were prepared by a six-step sequence including a gold-catalyzed arene synthesis and a photochemical S(N)2-like reduction with lithium aluminum hydride. Not a single protective group was needed in the entire synthesis. With both diastereomers in hand, the stereochemicalassignment in the literature could be corrected by
Synthesis of (±)‐
<i>epi</i>
‐Jungianol by the Gold(I)‐Catalyzed Propargyl Claisen Rearrangement/Hydroarylation Cascade Reaction of Propargyl Vinyl Ethers
作者:Antonia Rinaldi、Vittoria Langé、Dina Scarpi、Ernesto G. Occhiato
DOI:10.1002/ejoc.202001555
日期:2021.2.25
The total synthesis of epi‐jungianol was carried out by exploiting the gold(I)‐catalyzed propargyl Claisen rearrangement/hydroarylation cascade reaction of substitutedpropargyl vinyl ethers. The methodology appears suitable for the preparation of natural and bioactive compounds containing the cis 1,3‐disubstituted indane skeleton.