Abstract
Studies on the Field of Natural Products Chemistry, 71. Psoralen and Angelicin by Reaction of 7‐Hydroxycoumarin with 4‐Chloro‐1,3‐dioxolan‐2‐oneDirect condensation of umbelliferone (1) with 4‐chloro‐1,3‐dioxolan‐2‐one (2) yields 15% psoralen (3) and 20% angelicin (4).

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