Synthesis of β-Lactams by Convenient Annelation of Imines

Abstract
2-Acyl-3-oxo-4,5-benzo-1,2-thiazoline 1,1-dioxide (3) provides good yield routes to monocyclic 3-lactams (6) and tricyclic β-lactams (7) from a variety of imines (4) and 1-substituted-3,4-dihydroisoquinolines (5).

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