(S)-ethyl 2-(cyclohexenyloxy)propanoate 、
methyl 4-phenyl-2-oxo-3-butenoate 在
tris(6,6,7,7,8,8-heptafluoro-2,2-dimethyl-3,5-octadionato)europium(III) 作用下,
以
Petroleum ether 为溶剂,
反应 72.0h,
以64%的产率得到methyl 8a-((S)-1-ethoxy-1-oxopropan-2-yloxy)-4-phenyl-4a,5,6,7,8,8a-hexahydro-4H-chromene-2-carboxylate