Synthesis 2002(10): 1445-1453
DOI: 10.1055/s-2002-33112
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart · New York

Organolithium-Induced Synthesis of Unsaturated Diols from Epoxides of Dihydrofurans and Dihydropyrans

David M. Hodgson*a, Matthew A. H. Stenta, Francis X. Wilsonb
a Dyson Perrins Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QY, UK, Fax: +44(1865)275674; e-Mail: david.hodgson@chem.ox.ac.uk ;
b Roche Discovery (Welwyn), 40 Broadwater Road, Welwyn Garden City, Herts AL7 3AY, UK
Further Information

Publication History

Received 2 February 2002
Publication Date:
01 August 2002 (online)

Abstract

Dihydrofuran and dihydropyran epoxides undergo a stereospecific­ alkylative double ring-opening with organolithiums to provide a new route to substituted alkenediols.

1

New address: Xenova Limited, 957 Buckingham Avenue, Slough, Berks SL1 4NL, UK.

20

Epoxidation with mCPBA (1.1 equiv, CH2Cl2, 25 °C, 16 h) gave epoxides 21 and 22 (21: 22, 1: 2) in 75% yield.