Silveira CC, Braga AL, Vieira AS, Zeni G. Stereoselective synthesis of enynes by nickel-catalyzed cross-coupling of divinylic chalcogenides with alkynes.
J Org Chem 2003;
68:662-5. [PMID:
12530908 DOI:
10.1021/jo0261707]
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Abstract
(Z,Z)- and (E,E)-divinylic selenides and telurides undergo direct coupling with terminal alkynes in the presence of a nickel/CuI catalyst at room temperature to give (Z)- and (E)-enyne systems in good yields and with complete retention of configuration.
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