
%0 Journal Article
%A Ahmad, MS 
%A Sharma, RP 
%A Siddiqui, H 
%A Shafiullah, 
%T Further observations concerning steroidal, &#946;-lactones. Boron trifluoride catalysed rearrangements of &#946;-lactones in the cholestane series
%J Australian Journal of Chemistry
%D 1968/07/01
%V 21
%N 7
%P 1867-1872
%K 
%R https://doi.org/10.1071/CH9681867
%U https://www.publish.csiro.au/paper/CH9681867 
%X B-Nor-5&#946;-cholestane-3,3,5-diol-6-carboxylic acid 5,6-lactone 3-acetate on treatment with BF3 etherate in ether or ether-acetic anhydride gave B-norcholest-5-en-3&#946;-ol-6-carboxylic acid 3-acetate and 19-nor-5-methyl-B-nor-5&#946;-cholest-9(10)-en-3,3-ol-6-carboxylic acid 3-acetate, a product of the Westphalen rearrangement. B-Nor-5&#946;-cholestan-5-ol-6-carboxylic acid 5,6-lactone under similar reaction conditions provided the product of the Westphalen rearrangement, 19-nor-5-methyl-B-nor-5&#946;-cholest-9(10)-ene-6-carboxylic acid. 
