Efficient Synthesis of (+)-Kalafungin and (-)-Nanaomycin D by Asymmetric Dihydroxylation, Oxa-Pictet-Spengler Cyclization, and H2SO4-Mediated Isomerization
Efficient Synthesis of (+)-Kalafungin and (-)-Nanaomycin D by Asymmetric Dihydroxylation, Oxa-Pictet-Spengler Cyclization, and H2SO4-Mediated Isomerization
Formal synthesis of nanaomycin D via a Hauser–Kraus annulation using a chiral enone-lactone
作者:Najmah P.S. Hassan、Briar J. Naysmith、Jonathan Sperry、Margaret A. Brimble
DOI:10.1016/j.tet.2014.09.014
日期:2015.9
A formal total synthesis of nanaomycin D has been achieved. The strategy employed made use of a one-pot cyclisation–stereoselective reduction of a hydroxyketone to install the pyranonaphthalene moiety after execution of a Hauser–Kraus annulation using a chiral enone-lactone as the Michael acceptor to append the γ-lactone ring. The chirality in the chiral enone-lactone was established using a Sharpless