
%0 Journal Article
%A Bolte, ML 
%A Crow, WD 
%A Yoshida, S 
%T Plant growth regulators in <I>Eucalyptus grandis</I>. IV. Synthetic approaches to G-regulator analogues
%J Australian Journal of Chemistry
%D 1982/07/01
%V 35
%N 7
%P 1411-1419
%K 
%R https://doi.org/10.1071/CH9821411
%U https://www.publish.csiro.au/paper/CH9821411 
%X A new synthetic approach is described to the plant growth regulators of the hexahydrobenzo[e]- 1,2-dioxin group (the G-regulators of Eucalyptus grandis). Condensation of 1,3-diketones with aldehydes under Lewis acid catalysis gives, in good yield, the 1 : 2 adducts (4H-1,3-dioxins); these are simultaneously cleaved and (with some exceptions) oxidized on silica gel to the desired structure. In this way synthesis of a number of G-regulator analogues of similar physiological activity has been achieved. 
