HIGH-PRESSURE CYCLOADDITIONS OF PYRONES - SYNTHESIS OF HIGHLY FUNCTIONALIZED 6-MEMBERED RINGS BY INHIBITION OF CARBON-DIOXIDE LOSS
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A series of highly functionalized bicyclic adducts (3-6) have been prepared via the high-pressure (20-40 kbar) cycloaddition of 3-hydroxy-2-pyrone (2) with various dieno-philes at room temperature. 1977, American Chemical Society. All rights reserved.