Journal
CHEMICAL COMMUNICATIONS
Volume 51, Issue 4, Pages 768-771Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cc08117j
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Funding
- National Natural Science Foundation of China [21302109, 21302110, 21375075]
- Taishan Scholar Foundation of Shandong Province
- Excellent Middle-Aged and Young Scientist Award Foundation of Shandong Province [BS2013YY019]
- Scientific Research Foundation of Qufu Normal University [BSQD 2012020]
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A novel and metal-free procedure has been developed for the construction of 3-sulfonated coumarins via the direct difunctionalization of alkynoates with sulfonylhydrazides. The present protocol, which simply utilizes TBAI as the catalyst and TBHP as the oxidant, provides a convenient and highly efficient approach to construct a series of sulfonated coumarins with high regioselectivity and good functional group tolerance.
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