
%0 Journal Article
%A Blair, IA 
%A Mander, LN 
%A Mundill, PHC 
%A Pyne, SG 
%T Studies on the total synthesis of gibberellins. A new strategy for A-ring construction
%J Australian Journal of Chemistry
%D 1981/09/01
%V 34
%N 9
%P 1887-1898
%K 
%R https://doi.org/10.1071/CH9811887
%U https://www.publish.csiro.au/paper/CH9811887 
%X 3-(4',6'-Dimethoxynaphthalen-1'-yl)propanoic acid (10) was transformed to 8-methoxy-5-(3'-oxo- butyl)-1,2,3,4-tetrahydronaphthalene-2-carboxyic acid (8) and its 2-hydroxy derivative (9) by conventional synthetic reactions. Acid-catalysed cyclization of the derived diazomethyl ketones (23), (24) and (25) led to dienones (26), (27) and (28) which readily underwent base-catalysed 1,4-conjugate addition to provide the hydroethanophenanthrenetriones (30), (31) and (32) respectively. 
