Dibenzo[a,o]phenanthro[3,4-s]pycene, a configurationally stable double helicene: synthesis and determination of its conformation by NMR and GIAO calculations

Diego Peña; Agustín Cobas; Dolores Pérez; Enrique Guitián; Luis Castedo

doi:10.1021/ol034433t

Dibenzo[a,o]phenanthro[3,4-s]pycene, a configurationally stable double helicene: synthesis and determination of its conformation by NMR and GIAO calculations

Org Lett. 2003 May 29;5(11):1863-6. doi: 10.1021/ol034433t.

Authors

Diego Peña¹, Agustín Cobas, Dolores Pérez, Enrique Guitián, Luis Castedo

Affiliation

¹ Departamento de Química Orgánica y Unidad Asociada al CSIC, Universidad de Santiago, 15782 Santiago de Compostela, Spain.

PMID: 12762672
DOI: 10.1021/ol034433t

Abstract

[reaction: see text] A double helicene formed by a pentahelicene and a heptahelicene with two rings in common was obtained by palladium-catalyzed cyclotrimerization of 3,4-didehydrophenanthrene and was characterized conformationally by NMR and GIAO calculations.