An easy approach to the synthesis of azahelicenes is based on the photochemical cyclisation of symmetrically or asymmetrically 1,2-aryl-substituted double bonds. In the synthesis of 2,13-diaza[5]helicene, irradiation of 9-(2-pyridin-4-yl-vinyl)-benzo[h]isoquinoline yielded 2,9-diaza-dibenzo[a.h]anthracene together with the desired helicene, and the ratio of the two products depends on the solvent. In this paper we suggest that the ratio between the two products should not be ascribed to different transitions induced by the solvent but to different populations of the two Z conformers

2, 13-Diaza [5] helicene: synthesis, theoretical calculations and spectroscopic properties

LONGHI, Giovanna;
2009-01-01

Abstract

An easy approach to the synthesis of azahelicenes is based on the photochemical cyclisation of symmetrically or asymmetrically 1,2-aryl-substituted double bonds. In the synthesis of 2,13-diaza[5]helicene, irradiation of 9-(2-pyridin-4-yl-vinyl)-benzo[h]isoquinoline yielded 2,9-diaza-dibenzo[a.h]anthracene together with the desired helicene, and the ratio of the two products depends on the solvent. In this paper we suggest that the ratio between the two products should not be ascribed to different transitions induced by the solvent but to different populations of the two Z conformers
File in questo prodotto:
File Dimensione Formato  
arkivoc2009.pdf

gestori archivio

Tipologia: Full Text
Licenza: DRM non definito
Dimensione 123 kB
Formato Adobe PDF
123 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/165505
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 12
social impact