Nyerges, Miklos; Pinter, Aron; Viranyi, Andrea; Bitter, Istvan; Toke, Laszlo:

Synthesis of benz[5,6]azepino[4,3-b]indoles by 1,7-electrocyclisation of azomethine ylides.

In: Tetrahedron letters (Tetrahedron Lett.), Jg. 46 (2005) ; Nr. 3, S. 377-380
ISSN: 0040-4039
Zeitschriftenaufsatz / Fach: Chemie
A new, general route to the benz[5,6]azepino[4,3-b]indole ring system has been developed via the 1,7-dipolar electrocyclisation reactions of azomethine ylides derived from easily available 3-formyl indole derivs. The intermediacy of azomethine ylides was shown by the trapping of the proposed a,b:g,d-conjugated dipole with N-phenylmaleimide.