HfCl4/NaBH4体系对亚砜的脱氧还原

Fine Chemicals(2013)

Cited 23|Views17
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Abstract
对HfCl4/NaBH4体系下亚砜的脱氧还原反应进行了研究.考察了溶剂、温度、摩尔比等因素对该反应的影响.结果表明,在HfCl4/NaBH4体系下,当溶剂为四氢呋喃(THF)、n(底物)∶n(HfCl4)∶n(NaBH4)=0.8∶0.34∶4.0时,亚砜回流反应0.6~1.5 h,脱氧还原得收率88% ~ 99%的硫醚产物.此外,在上述脱氧反应过程中,—NO2,—OMe,—F,—Cl,—Br等宫能团具有兼容性.该法对二苯基亚砜、二苄基亚砜尤为适合,收率高达98% ~ 99%.
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Key words
drug materials,HfCl4,sulfoxides,NaBH4,deoxygenation,sulfides,KBH4
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