Abstract
Aryne–imine–aryne coupling: Two molar amounts of arynes have been formally inserted into carbon−nitrogen double bonds of imines. This aryne–imine–aryne coupling reaction selectively produces acridane derivatives via intermediary generation of transient aza-o-quinone methides. The use of imines with steric bulk at the imine carbon, which leads to preferential formation of ‘outward’ aza-o-quinone methides, is the key for this reaction. More information can be found in the Communication by Hiroto Yoshida et al. on page 973 in Issue 8, 2017 (DOI: 10.1002/ajoc.201700251).
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