The dimeric products (la‐c) have been prepared by treatment of N‐oxides derived from some indole alkaloids. Their structures have been elucidated by detailed NMR investigations and the structure of 1c determined by X‐ray analysis. The importance of the E2‐type trans‐axial elimination of the N‐acyloxy intermediate in the dimer formation has also been established. The iminium salts 4a‐b and the derived pseudocyanide 6 have been prepared.
ASJC Scopus subject areas