期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 11, 期 9, 页码 1451-1455出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ob27288e
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资金
- National Natural Science Foundation of China [21172112, 21172118]
- National Basic Research Program of China (973 Program) [2010CB833300, 2012CB821600]
- Fundamental Research Funds for the Central Universities
- Program for New Century Excellent Talents in University
- State Key Laboratory on Elemento-organic Chemistry (Nankai University, China)
A regioselective [3 + 2] cycloaddition of benzofuranone type active olefins with allenoates catalyzed by trivalent phosphines has been developed, which provided an easy access to enriched functionalized spirocyclic benzofuranones. The reactions accommodated a number of benzofuranone type electron-deficient olefins and allenoates to give the desired 3-spirocyclopentane benzofuran-2-ones or 2-spirocyclopentane benzofuran-3-ones with moderate to excellent yields (up to 99%) and moderate to good regioselectivities (up to 11 : 1).
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