Base-promoted cascade reactions for the synthesis of:
(a) 3,3-dialkylated isoindolin-1-ones and 3-methyleneisoindolin-1-ones
(b) 3,4-dialkylated isoindolin-1-ones and 2-methyleneisoindolin-1-ones
(c) 2,3-dialkylated isoindolin-1-ones and 4-methyleneisoindolin-1-ones
(d) 3,5-dialkylated isoindolin-1-ones and 1-methyleneisoindolin-1-ones