Synthesis 2008(14): 2199-2210  
DOI: 10.1055/s-2008-1067148
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

New Octahydropyrido[3,4-b]acridine Scaffolds for Combinatorial Chemistry

Claas Lüder Diedrich, Detlev Haase, Jens Christoffers*
Institut für Reine und Angewandte Chemie, Universität Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26111 Oldenburg, Germany
Fax: +49(441)7983873; e-Mail: jens.christoffers@uni-oldenburg.de;
Further Information

Publication History

Received 15 April 2008
Publication Date:
18 June 2008 (online)

Abstract

Friedländer reaction of aminobromobenzaldehydes with an optically active decahydroisoquinolone building block gave new octahydropyrido[3,4-b]acridines with quantitative regioselectivity. The products define a platform for combinatorial chemistry. Bromine functions could be reacted further using Suzuki, Heck, Sonogashira, and Buchwald-Hartwig reactions as well as cyanations. The secondary amino function was deprotected and coupled with amino acids and benzoic acid derivatives. A small model library has been prepared.

11

CCDC-682901 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html [or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44(1223)336033; e-mail: deposit@ccdc.cam.ac.uk].

13

cataCXium FSulf = dicyclohexyl{2-sulfo-9-[3-(4-sulfo-phenyl)propyl]-9H-fluoren-9-yl}phosphonium hydrogen-sulfate; cataCXium C = trans-bis(acetato)bis[2-(di-2-tolyl-phosphino)benzyl]dipalladium(II); cataCXium PIntB = 2-(di-tert-butylphosphino)-1-phenylindole, cataCXium FBu = (9-butyl-9H-fluoren-9-yl)dicyclohexylphosphonium tetrafluoroborate.