Synthesis 2009(4): 636-642  
DOI: 10.1055/s-0028-1083341
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

A New Class of Tröger’s Base Analogues Bearing Spiro[4.5] Lactone Straps

Andrew B. Mahona, Donald C. Craigb, Andrew C. Try*a
a Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
Fax: +61(2)98508313; e-Mail: andrew.try@mq.edu.au;
b School of Chemistry, University of New South Wales, NSW 2052, Australia
Further Information

Publication History

Received 25 September 2008
Publication Date:
27 January 2009 (online)

Abstract

A protocol for the introduction of spiro[4.5] lactone straps onto the Tröger’s base scaffold has been developed. The conversion­ was found to be most efficient when an appropriate carboxylic­ acid derivative reacted with 5,6,11,12-tetrahydrodibenzo[b,f][1,5]diazocines. Whilst phthaloyl dichloride was the main strap-forming precursor used, other 1,2-unsaturated dicarboxylic acids could be used in the presence of N,N′-dicyclohexylcarbodi­imide.