Journal
ORGANIC LETTERS
Volume 18, Issue 17, Pages 4336-4339Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.6b02095
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Funding
- National Science Foundation of China [21472151]
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An efficient asymmetric Mannich reaction of isatin-based ketimines withchiral alpha-diazomethylphosphonates has been developed using a binaphthanol-derived silver phosphate as the catalyst. This reaction allowed the construction of a series of chiral oxindoles bearing a quaternary stereocenter and amino group at the C3 position with up to 95% yields and 99% ee. Those products could be further transformed into promising densely functionalized compounds by merging of the oxindole and beta-aminophosphonate.
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