
%0 Journal Article
%A Cambie, RC 
%A Grigor, BA 
%A Hayward, RC 
%A Nielson, AJ 
%T Chemistry of the Podocarpaceae. XLIX. Isomerization of 12-Methoxy-19-norpodocarpatetraenes
%J Australian Journal of Chemistry
%D 1974/09/01
%V 27
%N 9
%P 2017-2024
%K 
%R https://doi.org/10.1071/CH9742017
%U https://www.publish.csiro.au/paper/CH9742017 
%X Methods for isomerization of the 12-methoxy-19-norpodocarpatetraene mixture obtained from oxidative decarboxylation of 12-methoxypodocarpa-8,11,13-trien-19-oic acid (1) with lead tetraacetate have been examined. Acid-catalysed isomerization gives a mixture of the endocyclic isomers (11) and (19) while iodine-catalysed isomerization gives a mixture enriched in the isomer (19) to the extent of 80%. Metal-catalysed decarbonylation of the acid chloride (6) and oxidative decarboxylation of the acetoxy acid (7) have also been examined. 
