
%0 Journal Article
%A Mander, LN 
%A Urech, R 
%T Studies on gibberellin synthesis. Preparation of advanced intermediates based on 1 H-2,10a-ethanophenanthrene
%J Australian Journal of Chemistry
%D 1983/06/01
%V 36
%N 6
%P 1177-1185
%K 
%R https://doi.org/10.1071/CH9831177
%U https://www.publish.csiro.au/paper/CH9831177 
%X The phenanthrenone (6) was converted into 1H-2,10a-ethanophenanthrene (16) by means of an acid-induced cyclization of &#945;-diazoketone (14). Protection and hydrogenation of (16), followed by reductive methylation of the resulting tetracyclic ester (20) gave the corresponding dihydro derivatives(22) or (23), potential precursors to gibberellic acid (8). 
