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Chemistry LibreTexts

Brønsted Acid Additions

  • Page ID
    897
  • [ "article:topic", "Lower Division", "Organic", "authorname:wreusch", "showtoc:no" ]

    The stereoselectivity of Brønsted acid addition is sensitive to experimental conditions such as temperature and reagent concentration. The selectivity is often anti, but reports of syn selectivity and non-selectivity are not uncommon. Of all the reagents discussed here, these strong acid additions (E = H in the following equation) come closest to proceeding by the proposed two-step mechanism in which a discrete carbocation intermediate is generated in the first step. Such reactions are most prone to rearrangement when this is favored by the alkene structure.

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