Synlett 2012; 23(7): 1047-1051
DOI: 10.1055/s-0031-1290751
letter
© Georg Thieme Verlag Stuttgart · New York

Photochemically Induced Synthesis of the Topoisomerase I Inhibitors Indeno[1,2-c]isoquinoline-5,11-diones

Mélanie Dubois
a   Univ Lille Nord de France, 59000 Lille, France
b   USTL, Laboratoire de Chimie Organique Physique, EA CMF 4478, Bâtiment C3(2), 59655 Villeneuve d’Ascq Cedex, France
,
Eric Deniau
a   Univ Lille Nord de France, 59000 Lille, France
b   USTL, Laboratoire de Chimie Organique Physique, EA CMF 4478, Bâtiment C3(2), 59655 Villeneuve d’Ascq Cedex, France
,
Axel Couture*
a   Univ Lille Nord de France, 59000 Lille, France
c   CNRS, UMR 8181 ‘UCCS’, Bâtiment C3(2), 59655 Villeneuve d’Ascq Cedex, France, Fax: +33(3)20436309   Email: axel.couture@univ-lille1.fr
,
Pierre Grandclaudon
a   Univ Lille Nord de France, 59000 Lille, France
b   USTL, Laboratoire de Chimie Organique Physique, EA CMF 4478, Bâtiment C3(2), 59655 Villeneuve d’Ascq Cedex, France
› Author Affiliations
Further Information

Publication History

Received: 13 January 2012

Accepted after revision: 15 February 2012

Publication Date:
05 April 2012 (online)


Abstract

A convenient synthesis of indeno[1,2-c]isoquinoline-5,11-diones has been achieved using combinational photochemical and carbocationic cyclization tactics. The synthetic route involved first the construction of adequately functionalized N-styryl benz­amides via Suzuki–Miyaura cross-coupling reaction with enol phosphate combined with a six-π-electron photocyclization process. The assembling of the title compounds was readily ensured through sequential carbocationic annulation reaction and ultimate oxidation of a latent hydroxy functionality.