ChemInform Abstract: The Convergent (AB + CD) Route to 9-Acetyl-7,8,9,10-tetrahydronaphthacenedione.
Abstract
The bis(bromomethyl)dihydrothiophene dioxide (I), derived from 2,3-dimethyl-1,3-butadiene, reacts with methyl vinyl ketone (II), forming the thermally labile hexahydrobenzothiophene dioxide (III).
ChemInform Abstract
The bis(bromomethyl)dihydrothiophene dioxide (I), derived from 2,3-dimethyl-1,3-butadiene, reacts with methyl vinyl ketone (II), forming the thermally labile hexahydrobenzothiophene dioxide (III). This is coupled with the bromonaphthoquinone (IV) to give the acetyltetrahydronaphthacenedione (V) which is also prepared from the dibromide (VI) via the ketone (VII).