期刊
CHEMICAL COMMUNICATIONS
卷 51, 期 39, 页码 8330-8333出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cc02096d
关键词
-
资金
- NSFC [21302032, 21373073]
- PCSIRT [IRT 1231]
A chiral cooperative catalysis of NHC and Bronsted acid for a formal [4+2] reaction of unprotected isatins and enals was developed for the direct synthesis of unprotected spiro[indoline-3,2'-pyran]-2,6'(3'H)-diones in good to excellent yields (up to 95%) with high enantioselectivities (up to >93% ee).
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