期刊
ORGANIC LETTERS
卷 17, 期 18, 页码 4490-4493出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.5b02157
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资金
- NSFC [21122056, 21321061]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13031]
Zwitterionic dienolates generated from Morita-Baylis-Hillman carbonates of cyclohexen-2-one and a phenolic tertiary amine catalyst underwent divergent cyclization reactions with isatylidene malononitriles. A new [4 + 2] stepwise cyclization process was disclosed to deliver complex bridged spirooxindoles after the initial delta'-regioselective Rauhut-Currier-type reaction with N-methyl electrophiles by the catalysis of beta-isocupreidine, while spirooxindoles incorporating an aromatic chromene motif were generated with N-MOM acceptors in the presence of alpha-isocupreine through different domino transformations.
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