The tetrahydroquinolines obtained through the Povarov multicomponent reaction have been oxidized to the corresponding quinoline, giving access to a single product through a two-step sequence. Several oxidizing agents were studied and manganese dioxide proved to be the reagent of choice, affording higher yields, cleaner reactions and practical protocols.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3170197 | PMC |
http://dx.doi.org/10.3762/bjoc.7.110 | DOI Listing |
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