Stereoselective synthesis of enynes by nickel-catalyzed cross-coupling of divinylic chalcogenides with alkynes |
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| Authors: | Silveira Claudio C Braga Antonio L Vieira Adriano S Zeni Gilson |
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| Institution: | Departamento de Química, Universidade Federal de Santa Maria, C. P. 5001, CEP 97105-900, RS, Brazil. silveira@quimica.ufsm.br |
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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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