Diastereoselective synthesis of dihydroisoindolo[2,1-a]quinolin-11-ones by solvent-free AMCell-SO₃H-catalyzed imino Diels-Alder/intramolecular amide cyclization cascade reactions.

2014 
Nineteen bioactive highly functionalized 6,6a-dihydroisoindolo[2,1-a]quinolin-11(5H)-one derivatives were easily prepared in good yield without solvent using catalytic amorphous milled cellulose sulfonic acid (AMCell-SO3H), substituted anilines, propenyl-phenols, and phthaldehydic acid. The cascade reaction gave high regioselectivity and diastereoselectivity.
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