Synthesis 2003(12): 1837-1843
DOI: 10.1055/s-2003-41026
PAPER
© Georg ThiemeVerlag Stuttgart · New York

Syntheses of Showdomycin andits Anomer Using N-(Triisopropylsilyl)pyrrole asa Synthetic Equivalent for the Maleimide C3-Anion

Natasha L. Hungerford, David J. Armitt, Martin G. Banwell*
Research School of Chemistry, Instituteof Advanced Studies, The Australian NationalUniversity, Canberra, ACT 0200, Australia
Fax: +61(2)61258114; e-Mail: mgb@rsc.anu.edu.au;
Further Information

Publication History

Received 9 July 2003
Publication Date:
13 August 2003 (online)

Abstract

Showdomycin (1) and its anomer (2) have been prepared in four steps fromreadily available trichloroacetimidate 9.The key step involves reaction of the last compound with the titlepyrrole 3 so as to form a chromatographically separable mixtureof the pyrrole C-glycosides 10 and 11. Thesepyrroles are desilylated then oxidized to the corresponding maleimidesusing PCC.

11

Compound 7 canbe purchased from the Aldrich Chemical Company.