(2'E,4'E)-1-hydroxy-3-methyl-2-(4'-methyl-hexa-2',4'-dienoyl)-8,9,10-trimethoxyanthracene 在
selenium(IV) oxide 作用下,
以
various solvent(s) 为溶剂,
以10%的产率得到(1'E)-5-methyl-2-(1'-methyl-1'-propenyl)-7,11,12-trimethoxy-2,3-dihydro-4H-anthra<1,2-b>pyran-4-one