Synthesis 2019; 51(16): 3117-3126
DOI: 10.1055/s-0037-1610709
paper
© Georg Thieme Verlag Stuttgart · New York

Nickel-Catalyzed Homocoupling of (Z)-β-Iodoenol Esters: Stereoselective Access to (Z,Z)-Buta-1,3-diene-1,4-diyl Diesters

,
Victorio Cadierno*
Laboratorio de Compuestos Organometálicos y Catálisis (Unidad Asociada al CSIC), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Orgánica e Inorgánica, IUQOEM, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain   Email: vcm@uniovi.es
› Author Affiliations
This work was supported by the Spanish MINECO Secretaría de Estado de Investigación, Desarrollo e Innovación (CTQ2016-75986-P) and the University of Oviedo (PAPI-18-GR-2011-0032).
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Publication History

Received: 20 February 2019

Accepted after revision: 05 April 2019

Publication Date:
25 April 2019 (online)


Dedicated to Prof. Pablo Espinet on the occasion of his 70th birthday

Abstract

A straightforward and broad-scope procedure to obtain symmetrically substituted buta-1,3-diene-1,4-diyl diesters, based on the homocoupling of the corresponding (Z)-β-iodoenol esters, is presented. It involves the use of a catalytic system composed of [NiCl2(PPh3)2] (10 mol%), NaI (10 mol%), and excess of Zn dust. The reactions proceed in THF at room temperature with exquisite preservation of the stereochemistry of the C=C bond of the starting iodoolefins, thus leading to the final dienes as the corresponding Z,Z-stereoisomers exclusively.

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