one-pot approach for the synthesis of polycyclicfused δ-lactams via the sequential phosgenation, Pd/NBE-catalyzed ortho-carbamoylation/ipso-Heck-type cyclization, and C–H activation from readily available aryl halides, amines, and triphosgenes. This reaction stands out as the first example of the in situ carbamoyl chloride formation from readily available amine precursors, presenting an alternative to