PDF herunterladen
Synthesis 1997; 1997(8): 963-966
DOI: 10.1055/s-1997-1277
paper
© 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.

Electrocyclization of β-Arylvinyl Ketenimines: Formal Syntheses of the Alkaloid from Marine Origin, 5,8-Dihydro-7-methoxy-1,6-dimethylisoquinoline-5,8-dione, and 3-Ethoxycarbonylrenierol

Pedro Molina* , Angel Vidal, Fulgencio Tovar
  • *Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, Espinardo-30071, Murcia, Spain, Fax +34(68)364149
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
31. Dezember 2000 (online)

  als PDF herunterladen  Lizenzen und Reprints Alle Artikel dieser Rubrik

A new six-step synthetic route for the preparation of the alkaloid from marine origin, 5,8-dihydro-7-methoxy-1,6-dimeethylisoquinoline-5,8-dione is reported. The method is based on the electrocyclization of the appropriate β-arylvinyl ketenimine, available by aza Wittig reaction of the corresponding vinyl iminophosphorane with (trimethylsilyl)ethenone followed by decarboxylation and further oxidative demethylation. Likewise, this method has successfully been applied to the preparation of the 3-ethoxycarbonylrenierol.

isoquinoline quinone - formal synthesis - ketenimine - aza Wittig/electrocyclic ring closure