Efficient and stereoselective syntheses of isomerically pure 4-aminotetrahydro-2H-thiopyran 1-oxide derivatives have successfully been achieved. Isomerically pure (4-nitrophenyl)sulfonyltetrahydro-2H-thiopyran 1-oxides were identified by X-ray crystallographic analyses, and isomerically pure sulfoxide derivatives were characterized by ¹H NMR. An oxidation reaction of tert-butyl(4-nitrophenyl)sulfonyl(tetrahydro-2H-thiopyran-4-yl)carbamate with Oxone provided steric control, affording its trans sulfoxide with high efficiency and selectivity. From the obtained trans sulfoxide derivatives, cis sulfoxide derivatives were synthesized conveniently by a hydrogen chloride catalyzed isomerization.

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异构纯4-氨基四氢-2 H-噻喃-1-氧化物衍生物的高效立体选择性合成

已成功实现了异构体纯的4-氨基四氢-2 H-硫代吡喃1-氧化物衍生物的高效和立体选择性合成。通过X射线晶体学分析鉴定了异构体纯的（4-硝基苯基）磺酰基四氢-2 H-噻喃1-氧化物，并且通过¹ H NMR表征了异构体纯的亚砜衍生物。叔丁基（4-硝基苯基）磺酰基（四氢-2 H-硫代吡喃-4-基）氨基甲酸酯与氧酮的氧化反应提供了空间控制，从而提供了高效率和选择性的反式亚砜。由所获得的反式亚砜衍生物，通过氯化氢催化的异构化方便地合成了顺式亚砜衍生物。