New siloxydienes, 2-amino-4-(trimethylsilyloxy)-1,3-pentadienes which
were easily obtained via enolization of enaminones derived from 2,4-pe
ntane-dione, and immediate silylation, reacted with maleimides to furn
ish reduced benzo[c]pyrrole-1,3-diones as major products, derived from
initial [4 + 2] cycloadducts.