Synthesis 2012; 44(20): 3197-3201
DOI: 10.1055/s-0032-1317149
paper
© Georg Thieme Verlag Stuttgart · New York

Synthesis of γ,δ-Unsaturated Selenoamides via the Seleno-Claisen Rearrangement of in situ Generated Allylic Vinyl Selenides from Selenoamides and Allylic Bromides­

Toshiaki Murai*
Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan   Fax: +81(58)2932614   Email: mtoshi@gifu-u.ac.jp
,
Tatsuya Ezaka
Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan   Fax: +81(58)2932614   Email: mtoshi@gifu-u.ac.jp
,
Shinzi Kato
Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan   Fax: +81(58)2932614   Email: mtoshi@gifu-u.ac.jp
› Author Affiliations
Further Information

Publication History

Received: 04 July 2012

Accepted after revision: 31 July 2012

Publication Date:
04 September 2012 (online)


Abstract

The deprotonation of α-monosubstituted selenoamides with LDA followed by allylation gives γ,δ-unsaturated selenoamides in good to high yields. In the initial step, allylation may take place at the selenium atom of lithium eneselenolates to form allylic vinyl selenides, which then undergo seleno-Claisen rearrangement. As allylic bromides, γ,γ-disubstituted compounds such as geranyl and neryl bromides could also be used to give products that incorporated tertiary-quaternary stereogenicity with high efficiency.