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We have developed Pd‐catalyzed oxidative cyclization reactions of a wide range of azulene‐2‐carboxylic acids with a large number of activated as well as unactivated 1,3‐dienes, consequently allowing a streamlined synthetic method for the selective preparation of monosubstituted alkenyl dihydroazulenolactones and their derivatives. [ABSTRACT FROM AUTHOR]

Sequential C(2)‐bromoarylation reaction and intramolecular CO bond formation from azulene‐1‐carboxylic acids and di(2‐bromoaryl)iodonium salts produced azulenolactones in one pot. The sequential reaction proceeded smoothly through the copper(I)‐mediated cyclization of 2‐(2‐bromoaryl)azulene‐1‐carboxylic acids derived from the regioselective iridium(III)‐catalyzed C(2)‐bromoarylation reaction without decarboxylation. [ABSTRACT FROM AUTHOR]