Abstract:
The Diels Alder addition of naphthoquinone (2a) to 1-trimethylsilyloxybuta-1,3-diene (3) afforded a 1.4 : 1 ratio of Diels Alder adducts (5a) and (6a) which were easily separated by flash chromatography. Individual treatment of adducts (5a) and (6a)