Walker SE, Boehnke J, Glen PE, Levey S, Patrick L, Jordan-Hore JA, Lee AL. Ligand- and base-free Pd(II)-catalyzed controlled switching between oxidative Heck and conjugate addition reactions.
Org Lett 2013;
15:1886-9. [PMID:
23578003 DOI:
10.1021/ol400539h]
[Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A simple change of solvent allows controlled and efficient switching between oxidative Heck and conjugate addition reactions on cyclic Michael acceptor substrates, catalyzed by a cationic Pd(II) catalyst system. Both reactions are ligand- and base-free and tolerant of air and moisture, and the controlled switching sheds light on some of the factors which favor one reaction over the other.
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