One-Step Synthesis of Furan Rings from α-Isopropylidene Ketones Mediated by Iodine/DMSO: An Approach to Potent Bioactive Terpenes
作者:Jonida Salihila、Lúcia Silva、Helena Pérez del Pulgar、Ana Quílez Molina、Azucena González-Coloma、A. Sonia Olmeda、José F. Quílez del Moral、Alejandro F. Barrero
DOI:10.1021/acs.joc.9b00704
日期:2019.6.7
transformation of α-isopropylidene ketones into furan rings following a biomimetic approach. This methodology has been used for the synthesis of terpene furans such as mintfurane, curzerene, atractylon, and isoatractylon, all of them possessing interesting biological activities. The synthesis of linderazulene directly from 4,5-epoxygermacrone via a cascade reaction shows the potential of this protocol
Biotransformation of germacrane epoxides by Cichorium intybus
作者:Dennis P. Piet、Robert Schrijvers、Maurice C.R. Franssen、Aede de Groot
DOI:10.1016/0040-4020(95)00272-a
日期:1995.5
The biotransformation of germacrone-4,5-epoxide (2), germacrone-1,10-epoxide (3), isogermacrone-4,5-epoxide (5), germacrene B-4,5-epoxide (6) and germacrene B-I,10-epoxide (7) by a suspension of fresh chicory root (Cichorium intybus) was investigated. Enzyme catalysed cyclisations towards substituted guaianes and eudesmanes were observed.