Journal
ORGANIC LETTERS
Volume 14, Issue 23, Pages 6032-6035Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol302922t
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- National Science Foundation [CHE-1213578]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1213578] Funding Source: National Science Foundation
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The Sonogashira/5-endo-dig/6-endo-dig cascade fuses a polycyclic aromatic backbone to the electron-rich furan subunit. The transformation proceeds in modest yields as a one-pot reaction. Efficiency of the full cascade is increased by removal of base prior to the addition of gold catalyst. Under these conditions, conversion to the full cascade products is achieved in nearly quantitative yields without purification of the intermediate products. Extension of the cascade toward triynes opens access to benzofuran-fused chrysene derivatives.
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