Phytochemicals from <i>Echinacea</i> and <i>Hypericum</i>: A Direct Synthesis of Isoligularone
作者:George A. Kraus、Jaehoon Bae、Junwon Kim
DOI:10.1080/00397910701215544
日期:2007.4.1
Abstract Reaction of trienes with α,β‐unsaturated aldehydes produces bicyclic products via a tandem Diels–Alder/ene reaction. The adduct from tiglic aldehyde was converted into isoligularone by conversion to a furan followed by benzylic oxidation.
Synthesis of the tetracyclic ring system of cumbiasin via tandem radical cyclizations
作者:George A. Kraus、Junwon Kim
DOI:10.1016/j.tetlet.2006.08.081
日期:2006.10
The tetracyclic ring system of cumbiasin was synthesized by a Diels–Alder reaction followed by tandem ring forming reactions from an alpha-keto radical.
姜黄素的四环系统是通过Diels-Alder反应,然后由α-酮基串联形成环而合成的。
Tandem Diels−Alder/Ene Reactions
作者:George A. Kraus、Junwon Kim
DOI:10.1021/ol048847d
日期:2004.9.1
[reaction: see text] The reactions of unsaturated aldehydes and triene 3 afford adducts via a tandemDiels-Alder/ene reaction.