ethyl (4aR,5S,8aR)-2-hydroxy-5-(4-methoxyphenyl)-8-(4-methylphenyl)sulfonyl-2,3,4,4a,5,8a-hexahydropyrano[2,3-b]pyridine-7-carboxylate 在
2-碘酰苯甲酸 作用下,
以
二甲基亚砜 为溶剂,
生成
ethyl (4aR,5S,8aR)-5-(4-methoxyphenyl)-8-(4-methylphenyl)sulfonyl-2-oxo-4,4a,5,8a-tetrahydro-3H-pyrano[2,3-b]pyridine-7-carboxylate