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Synthesis of lactam‐embedded indolizine core structures. The yields given are for the isolated product after four steps. [a] Ag2O was used to catalyze the 1,3‐dipolar cycloaddition. [b] [AuPPh3Cl] was used as a catalyst; DDQ was added for the oxidative aromatization. Boc=tert‐butoxycarbonyl.
