Metal-free base-mediated oxidative annulation cascades to 3-substituted-3-hydroxyoxindole and its 3-spirocyclic derivativeTools Liu, Min, Zhang, Chunxia, Ding, Mingruo, Tang, Bencan and Zhang, Fengzhi (2017) Metal-free base-mediated oxidative annulation cascades to 3-substituted-3-hydroxyoxindole and its 3-spirocyclic derivative. Green Chemistry, 19 . pp. 4509-4514. ISSN 1463-9262
Official URL: http://dx.doi.org/10.1039/c7gc01783a
AbstractA simple and efficient method was developed for the construction of the medicinally important 3-substituted-3-hydroxyoxindoleand its 3-spirocyclic derivativeswith readily available aniline derivatives as starting materials. Thishighly atom-and step-economical one-pot protocolwas carried out undermetal-freebase-mediated conditions througha novel oxidative annulationstrategywith oxygen as the oxidant.The key intermediates were isolated and confirmed.A reasonablereaction pathway was proposed and supported by both the preliminary experiments and computational studies.
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