甲醇 、
(S)-3-hydroxy-2,2-dimethyl-3-((4R,5S)-2,2,5-trimethyl-1,3-dioxolan-4-yl)propanal 在
对甲苯磺酸 作用下,
反应 12.0h,
生成 (2S,3R,4S,6R)-tetrahydro-6-methoxy-2,5,5-trimethyl-2H-pyran-3,4-diol 、 (2S,3R,4S,6S)-tetrahydro-6-methoxy-2,5,5-trimethyl-2H-pyran-3,4-diol