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

1,7-Electrocyclisations of stabilised azomethine ylides.

In: Tetrahedron letters (Tetrahedron Lett.), Jg. 44 (2003) ; Nr. 4, S. 793-794
ISSN: 0040-4039
Zeitschriftenaufsatz / Fach: Chemie
Ester-stabilized a,b:g,d-unsatd. azomethine ylides were generated by the deprotonation method from isoquinolinium salts. 1,7-Electrocyclization of these dipoles followed by a 1,5-hydrogen shift, gives tetrahydro[5,6]azepino[2,1-a]isoquinolines I (R = MeO2C, PhCH2, PhCO, CH2:CHCH2).