重氮甲烷 、
(2S,3R,4S)-4-((2R,3R,5S)-3,5-Dimethyl-6-oxo-tetrahydro-pyran-2-yl)-3-formyloxy-2-methyl-pentanoic acid 以
乙醚 为溶剂,
反应 0.25h,
以73%的产率得到(2S,3R,4S)-4-((2R,3R,5S)-3,5-Dimethyl-6-oxo-tetrahydro-pyran-2-yl)-3-formyloxy-2-methyl-pentanoic acid methyl ester