Table 2 Generality of the organocatalytic enantioselective [2 + 2] cycloaddition for the dearomatization of the indole core

From: Triplet state reactivity of iminium ions in organocatalytic asymmetric [2 + 2] photocycloadditions

  1. aKessil lamp at 400 nm.
  2. bReaction time of 18 h.
  3. cSolvent mixture: CHCl3/PhCl (1:1).
  4. dReaction time of 12 h.
  5. eReaction time of 3 h and 0 °C.
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