Journal
ORGANIC LETTERS
Volume 20, Issue 7, Pages 1744-1747Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b00206
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Funding
- National Natural Science Foundation of China [21272074]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
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A novel ring expansion reaction of indene-1,3-dione with alkynyl ketones under transition-metal-free conditions has been developed. This process offers an efficient and direct way to synthesize benzoannulated seven-membered rings or fused-ring compounds through C-C sigma-bond activation. Notable features of the procedure indude easily accessible starting materials, good functional group tolerance, and high atom economy.
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