
%0 Journal Article
%A Bennett, CR 
%A Cambie, RC 
%A Franich, RA 
%A Fullerton, TJ 
%T Chemistry of the Podocarpaceae. XXI. Preparation of 3-oxo derivatives of 12-Methoxy-18,19-bisnorpodocarpa-4,8,11,13-tetraene and 18,19-Bisnorabieta-4,8,11,13-tetraene
%J Australian Journal of Chemistry
%D 1969/08/01
%V 22
%N 8
%P 1711-1720
%K 
%R https://doi.org/10.1071/CH9691711
%U https://www.publish.csiro.au/paper/CH9691711 
%X 12-Methoxypodocarpa-8,11,13-trien-19-oic acid (11) has been converted into the 3-oxo compound (XX) via the C 3 benzylidene derivative of 12- methoxy-18,19. bisnor-5&#946;-podocarpa-8,11,13-trien-4-one (VIII). The route follows a modification of a sequence used by Zeiss and Martin to convert abieta-8,11,13-trien-18-oic acid (III) into a tricyclic steroid analogue. The latter conversion has been reinvestigated and modified to give a higher yield of 18,19-bisnorabieta-4,8,11,13-tetraen-3-one (XXI). 
