Stereo- and regio-chemical control in phenylthio migration around rings of sizes 5–15
Abstract
Acid-catalysed rearrangement of cyclic alcohols with neighbouring syn or anti phenylthio groups leads to allylic sulfides with endo- or exo-cyclic double bonds. Only the anti alcohols rearrange for ring sizes n= 5–10 but the syn alcohol rearranges if n= 12 or 15. The reasons for the product distribution, both regio- and stereo-chemical, are examined by molecular mechanics calculations.
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