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Chirale Biindole. Organokatalytische asymmetrische Additionen zwischen 2‐substituierten 3,3′‐Biindolen und Elektrophilen werden von F. Shi et al. in ihrer Zuschrift auf S. 3046 beschrieben.
The first catalytic asymmetric construction of 3,3′‐bisindole skeletons bearing both axial and central chirality has been established by organocatalytic asymmetric addition reactions of 2‐substituted 3,3′‐bisindoles with 3‐indolylmethanols (up to 98 % yield, all >95:5 d.r., >99 % ee). This reaction also represents the first highly enantioselective construction of axially chiral 3,3′‐bisindole...
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