Journal
ORGANIC LETTERS
Volume 13, Issue 17, Pages 4584-4587Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol201776h
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Funding
- National Natural Science Foundation of China [20972101, 21021001]
- National Basic Research Program of China (973 Program) [2010CB-833300]
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A chemo- and enantioselective [3 + 2] annulation of Morita-Baylis-Hillman carbonates of isatins with propargyl sulfones was catalyzed by a beta-ICD O-MOM ether 1c, affording spirocyclic 2-oxindoles bearing an unusual cyclopentadiene motif in outstanding ee values (up to >99%). More electrophiles, such as N-phenylmaleimide, have been also utilized to deliver complex spirocyclic 2-oxindoles with good results.
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