
TY  - JOUR
A1  - Blair, IA 
A1  - Mander, LN 
A1  - Mundill, PHC 
A1  - Pyne, SG 
T1  - Studies on the total synthesis of gibberellins. A new strategy for A-ring construction
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1981
VL  - 34
IS  - 9
SP  - 1887
EP  - 1898
KW  - 
UR  - https://doi.org/10.1071/CH9811887 
N2  - 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. 
ER  -

