Synthesis of (+)-altholactone, (+)-7-epi-altholactone, (−)-etharvensin, and (+)-alumheptolide-A using Pd-catalyzed carbonylation
作者:Yuki Miyazawa、Yasunao Hattori、Hidefumi Makabe
DOI:10.1016/j.tetlet.2018.09.062
日期:2018.11
Syntheses of (+)-altholactone isolated from Goniothalamus giganteus and its C-7 epimer (+)-7-epi-altholactone, (−)-etharvensin and (+)-alumheptolide-A were achieved. The lactone ring of these compounds was constructed using Pd-catalyzed carbonylation.
Enantiospecific Semisynthesis of (+)-Almuheptolide-A, a Novel Natural Heptolide Inhibitor of the Mammalian Mitochondrial Respiratory Chain
作者:Almudena Bermejo、José R. Tormo、Nuria Cabedo、Ernesto Estornell、Bruno Figadère、Diego Cortes
DOI:10.1021/jm9706574
日期:1998.12.1
(etharvensin (8) type) have been successfully achieved from the chiral unsaturated alpha-pyrone altholactone (7). This new method is a direct and one-step enantiospecific alkoxylation of altholactone (7) in concentrated acid medium, followed by formation of the eight-membered-ring zeta-lactone. The reaction mechanism operating in the synthesis of the heptolide skeleton is postulated to be a direct