(S)-2-Methoxy-2,4-dimethyl-3,4-dihydro-2H-pyrano[3,2-c]chromen-5-one 以
甲醇 为溶剂,
反应 24.0h,
生成
(2S,4S)-cis-2-hydroxy-2,4-dimethyl-3,4-dihydro-2H,5H-pyrano<3,2-c><1>benzopyran-5-one 、
(2R,4S)-2-Hydroxy-2,4-dimethyl-3,4-dihydro-2H-pyrano[3,2-c]chromen-5-one