萘酚 、
ethyl 4-phenyl-2-oxobut-3-enoate 在
1-(((1R,4aS,10aR)-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthren-1-yl)methyl)-3-((1R,2R)-2-(pyrrolidin-1-yl)cyclohexyl)thiourea 作用下,
以
乙醚 为溶剂,
反应 36.5h,
生成
(2R,4S)-ethyl 2-hydroxy-4-phenyl-3,4-dihydro-2H-benzo[h]chromene-2-carboxylate 、
(2S,4R)-ethyl 2-hydroxy-4-phenyl-3,4-dihydro-2H-benzo[h]chromene-2-carboxylate