(2R,3R,4S)-tert-butyl 3-(3,5-dimethoxyphenyl)-2-(2-oxoethyl)-4-phenyl-3,4-dihydro-2H-pyran-6-carboxylate 在
scandium tris(trifluoromethanesulfonate) 作用下,
以
氯仿 为溶剂,
反应 26.0h,
生成 tert-butyl 7,9-dimethoxy-6-(2-oxo-2-phenylethyl)-1-phenyl-4a,5,6,10b-tetrahydro-1H-benzo[f]chromene-3-carboxylate 、 (1S,4aR,6S,10bR)-tert-butyl 7,9-dimethoxy-6-(2-oxo-2-phenylethyl)-1-phenyl-4a,5,6,10b-tetrahydro-1H-benzo[f]chromene-3-carboxylate