Synthesis of (±)-4,5-<i>dia</i>-Parthenolide, an Unnatural Parthenolide Stereoisomer
作者:Robert R. A. Freund、Hans-Dieter Arndt
DOI:10.1021/acs.joc.6b01985
日期:2016.11.18
A short total synthesis of the novel unnatural parthenolide diastereomer (±)-4,5-dia-parthenolide was accomplished in 13 steps and an overall yield of 1.75% starting from commercially available (E,E)-farnesol. The challenging isopropenyl side chain oxidation was regioselectively achieved via a newly developed stepwise dihydroxylation procedure, employing a Bartlett–Smith iodocarbonate cyclization followed
The invention provides a method for converting sesquiterpene. The method includes reacting a sesquiterpene substract with a sesquiterpene converting enzyme. The enzyme is from a species or organism containing sesquiterpenes. The sesquiterpene substrate is not naturally present in the species or organism.
Climbing the Oxidase Phase Ladder by Using Dioxygen as the Sole Oxidant: The Case Study of Costunolide
作者:Kyriaki Gennaiou、Antonis Kelesidis、Alexandros L. Zografos
DOI:10.1021/acs.orglett.4c00406
日期:2024.4.19
discovery. Despite the progress made in their synthesis, their extensive oxidative decoration makes their chemo- and stereoselectivesyntheseshighly challenging. Herein, we report our effort to mimic part of the oxidase phase used in the costunolide pathway to achieve the protecting-group-free total synthesis of santamarine, dehydrocostus lactone, estafiatin, and nine more related natural sesquiterpenoid lactones