Synthesis of 7-Hydroxycoumarins by Condensation of Resorcinols with Ethyl Propiolate
Kurkowski, Martin F.
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In summary, the ethyl propiolate condensation fills out a valuable hole in the conversion of resorcinols to umbelliferoneso. Its use in the synthesis of psoralenes serves as a good example. But it should be clear, that the reaction has a potential use in a variety of other syntheses involving the formation of a 4-unsubstituted pyrone ring onto a benzene nucleus.