Add time:07/28/2019         Source:sciencedirect.com

A novel transformation of 7-hydroxy-2-methyl-2-(4-methyl-3-pentenyl)-4-chromanone (1) to intramolecular 1,3-arene-alkene photocycloadduct, (1S,2R,5S,7S,10S,13R)6,6,10-trimethyl-14-oxapentacyclo[8.3.1.01,7.02,1305,13] tetradecane-3,12-dione (3) via secondary photorearrangement of 1,2-arene-alkene photocycloadduct (2) has been described.

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