[(1S,6R)-4-Isopropyl-3-methoxy-1-methyl-2,5-dioxo-6-(2-oxo-ethyl)-cyclohex-3-enyl]-acetaldehyde 在
dibenzylammonium trifluoroacetate 作用下,
以
苯 为溶剂,
生成 (3aS,7aR)-6-Isopropyl-5-methoxy-3a-methyl-4,7-dioxo-3a,4,7,7a-tetrahydro-3H-indene-1-carbaldehyde 、 (3aR,7aR)-5-Isopropyl-6-methoxy-7a-methyl-4,7-dioxo-3a,4,7,7a-tetrahydro-3H-indene-1-carbaldehyde