E. Csuzdi et al., INTRAMOLECULAR CYCLIZATION WITH IMINIUM IONS SYNTHESIS OF 1,4-DIAZABICYCLO[4.3.1]DECENE DERIVATIVES, Tetrahedron letters, 34(27), 1993, pp. 4343-4346
Intramolecular cyclization reactions between iminium ion and conjugate
d double bond as a nucleophilic terminator producing 1.4-diazabicyclo[
4.3.1]decene derivatives were observed.