5-Methyl-2-(4-methyl-pent-3-enyl)-pyran-4-one 在
盐酸 作用下,
生成 (3aS,6S,6aR)-3a-Hydroxy-6-isopropenyl-2-methyl-4,5,6,6a-tetrahydro-3aH-pentalen-1-one 、 (3aR,6S,6aS)-3a-Hydroxy-6-(1-hydroxy-1-methyl-ethyl)-2-methyl-4,5,6,6a-tetrahydro-3aH-pentalen-1-one 、 (3aR,6R,6aS)-3a-Hydroxy-2-methyl-6-[1-methyl-1-(2,2,2-trifluoro-ethoxy)-ethyl]-4,5,6,6a-tetrahydro-3aH-pentalen-1-one