Diastereoselective tandem 6-exo carbolithiation intramolecular ring opening in (-)-8-aminomenthol-derived perhydrobenzoxazines. A new synthesis of enantiopure 4-substituted tetrahydro isoquinolines and 2-azabenzonorbornanes

1. Pedrosa, R.
2. Andrés, C.
3. Iglesias, J.M.
4. Pérez-Encabo, A.