PDF herunterladen
Synlett 1994; 1994(7): 533-534
DOI: 10.1055/s-1994-22918
letter
© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

A New Synthesis of Cyclopenta[a]phenanthrene Involving Cyclization of 2-(2-Naphthyl)-cyclopentylidenemalonodinitrile

Tadeusz Górecki* , Janusz J. Sepiol
  • *Department of Organic Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
18. September 2002 (online)

 als PDF herunterladen  Lizenzen und Reprints Alle Artikel dieser Rubrik

16,17-Dihydro-15H-cyclopenta[a]phenanthrene (6) is synthesized in four steps by condensation of 2-(2-naphthyl)cyclopentanone (1) with malonodinitrile, cyclization of the cyclopentylidenemalonodinitrile 2 in concentrated sulfuric acid to 11-amino-16,17-dihydro-15H-cyclopenta[a]phenanthrene-12-carbonitrile (3), and the sequential removal of the nitrile and the amine functional groups from 3.