An Efficient Formal Synthesis of the Human Telomerase Inhibitor (±)-γ-Rubromycin
作者:Dominea C. K. Rathwell、Sung-Hyun Yang、Kit Y. Tsang、Margaret A. Brimble
DOI:10.1002/anie.200903316
日期:2009.10.12
in the naphthazarin and isocoumarin fragments facilitates the acid‐mediated spiroketalization step to afford the key densely functionalized spiroketal (see picture; EOM=ethoxymethyl) in the formal synthesis of (±)‐γ‐rubromycin. A novel regioselective allyloxylation/Claisen rearrangement of 2‐azido‐1,4‐naphthoquinone provides access to the highly oxygenated naphthazarin fragment.
Synthesis of the carbon skeleton of the griseorhodins
作者:Darcy J. Atkinson、Daniel P. Furkert、Margaret A. Brimble
DOI:10.1016/j.tet.2014.11.030
日期:2015.1
A synthetic strategy to access the carbonskeleton of the griseorhodin family of natural products has been developed. The key step involved the acid-mediated spirocyclisation of a highly functionalised dihydroxyketone. The delicate electronic balance between the electron rich naphthalene moiety and the electron-withdrawing isocoumarin ring system were finely tuned to facilitate the acid-mediated spirocyclisation