Synlett 2003(9): 1263-1266
DOI: 10.1055/s-2003-40358
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

A Direct Carbometallation-Stereoselective Cycloaddition-Ring Closing Metathesis Route to the Tricyclic ABC Core of Taxoids

Nidia P. Villalva-Servín, Alain Laurentb, Glenn P. A. Yap, Alex G. Fallis*a
a Centre for Research in Biopharmaceuticals, Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada
Fax: +1(613)5625170; e-Mail: afallis@science.uottawa.ca;
b Aegera Therapeutics Inc., Montreal, Quebec, H3E 1A8, Canada
Further Information

Publication History

Received 11 November 2002
Publication Date:
30 June 2003 (online)

Abstract

The synthesis of the tricyclic ABC ring-system of Taxol® (paclitaxel) is described. This direct route involves sequential reactions employing the carbometallation of a propargyl alcohol, followed by a cis-alkene tether controlled stereoselective intramolecular Diels-Alder reaction to generate the AB-ring system and ring closing metathesis (RCM) of the pendant allyl substituents to construct the C ring.