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Synthesis 2010(2): 233-238
DOI: 10.1055/s-0029-1217089
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
Further Information
Received
27 May 2009
Publication Date:
26 October 2009 (online)
Publication History
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.
Key words
metathesis - thiocyanates - Hoveyda-Grubbs catalyst - marine natural products - thiocyanatins
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