Synthesis 2010(2): 233-238  
DOI: 10.1055/s-0029-1217089
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Microwave-Assisted Cross-Metathesis of Unsaturated Thiocyanates: Application to the Synthesis of Thiocyanatins A and B and Analogues

Fanny Cros, Béatrice Pelotier, Olivier Piva*
Université de Lyon, Université Lyon 1, Institut de Chimie et de Biochimie Moléculaire et Supramoléculaire (ICBMS), UMR 5246 CNRS, 43, Bd du 11 novembre 1918, 69622 Villeurbanne cedex, France
Fax: +33(4)72448136; e-Mail: piva@univ-lyon1.fr;
Further Information

Publication History

Received 27 May 2009
Publication Date:
26 October 2009 (online)

Abstract

The syntheses of thiocyanatin B and related dithiocyanates have been carried out by cross metathesis of unsaturated thiocyanates promoted by a ruthenium catalyst. The efficiency of the reaction depends strongly on the nature of the catalyst, the length of the alkenyl chain, and the mode of activation (conventional heating or microwave activation). In the later case, isomerization of double bonds took place and altered the course of the reaction. Alternatively, thiocyanatins A and B were synthesized by only a three-step and a two-step procedure, respectively, from readily available tosylates.