Journal
CHEM
Volume 4, Issue 8, Pages 1983-1993Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2018.07.004
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Funding
- NSF [CHE-1619590]
- NIH [1R01GM120240-01]
- NSFC [21629201]
- Direct For Mathematical & Physical Scien [1619590] Funding Source: National Science Foundation
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM120240] Funding Source: NIH RePORTER
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Gold-catalyzed oxidative coupling of alkynes was developed as an efficient approach for the synthesis of challenging cyclic conjugated diynes (CCD). Compared with the classic copper-promoted oxidative coupling reaction of alkynes, this gold-catalyzed process exhibited a faster reaction rate due to rapid reductive elimination from the Au(III) intermediate. This unique reactivity thus allowed a challenging diyne macrocyclization to take place with high efficiency. Condition screening revealed an [(n-Bu)(4)N](+)[Cl-Au-Cl](-) salt as the optimal pre-catalyst. Macrocycles with ring size between 13 and 28 atoms were prepared in moderate to good yields, which highlighted the broad substrate scope of this new strategy. Furthermore, the synthetic utilities of the CCDs for copper-free click chemistry have been demonstrated, showcasing the potential application of this strategy in biological systems.
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