Abstract
AbstractPalladium‐catalyzed oxidative [4+2] cyclization reactions were developed from the C−H activation reaction of N‐methoxyazulene‐1‐ and 2‐carboxamides with symmetrical and unsymmetrical alkynes under a molecular oxygen atmosphere, producing azulenopyridinone derivatives with novel azulene skeletons in good to excellent yields with a wide substrate scope and excellent functional group tolerance.magnified image
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