All articles of this category Secondary and tertiary alcohols are efficiently dehydrated by reaction with p -toluenesulfonic acid supported on silica gel. In particular, the procedure allows the direct conversion of 3-hydroxy-steroids into Δ 2 -olefins or Δ 3,5 -dienes, without passing through the mesylate or tosylate esters.
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D'ONOFRIO et al. (1985) studied this question.
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