来源：Journal of Heterocyclic Chemistry, 2013, 50(2): 272-280.
DOI：10.1002/jhet.1010
摘要
A novel reaction of isatins, 2-cyanoacetamide, and cyclic 1,3-diketones in ethanol was reported. The reaction gave the unexpected spirooxindole ethyl carboxylates in excellent yields and the spirooxindole carboxamide was not observed.
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