Journal
ORGANIC LETTERS
Volume 20, Issue 17, Pages 5332-5335Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b02251
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Funding
- National Natural Science Foundation of China [21602148, 21332003]
- Program for Guangdong Introducing Innovative and Entrepreneurial Teams [2016ZT06Y337]
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A novel gold-catalyzed water-mediated carbene cascade reaction of propargyl diazoacetates has been developed. Mechanistic investigation indicates that this reaction is initiated by gold-catalyzed gold carbene formation followed by an unprecedented 6-endo-dig carbocyclization with tethered alkyne through an oxonium ylide intermediate, terminated by a beta-H elimination/protodeauration process to give the aromatized furan products in good to high yields with broad substrate generality. Notably, the proposed gold carbene intermediates are verified by interception experiments.
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