Synthesis 2016; 48(24): 4509-4518
DOI: 10.1055/s-0035-1562536
paper
© Georg Thieme Verlag Stuttgart · New York

Stereoselective Synthesis of 2Z,4E-Configured Dienoates through Tethered Ring Closing Metathesis

Bernd Schmidt*
Universitaet Potsdam, Institut fuer Chemie, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam-Golm, Germany   eMail: bernd.schmidt@uni-potsdam.de
,
Stephan Audörsch
Universitaet Potsdam, Institut fuer Chemie, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam-Golm, Germany   eMail: bernd.schmidt@uni-potsdam.de
,
Oliver Kunz
Universitaet Potsdam, Institut fuer Chemie, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam-Golm, Germany   eMail: bernd.schmidt@uni-potsdam.de
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Publikationsverlauf

Received: 14. Juni 2016

Accepted after revision: 19. Juli 2016

Publikationsdatum:
31. August 2016 (online)


Abstract

A two-step sequence leading from racemic allylic alcohols and vinylacetic acid to ethyl (2Z,4E)-dienoates is described. The sequence involves Steglich esterification of the reactants, followed by a one-pot ring closing metathesis–base induced elimination–alkylation reaction to furnish the products in high stereoselectivity. Trapping of the intermediate sodium carboxylates is accomplished efficiently using Meerwein’s salt Et3OBF4.

Supporting Information